taxonID	type	description	language	source
044C38047165EF39D7D3FD5A257594D8.taxon	description	Figs 2, 12	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047165EF39D7D3FD5A257594D8.taxon	type_taxon	Type locality of the nominal species: Santa Cruz Basin, California, on whale falls at 1,000 – 1,700 m (Dahlgren et al. 2004).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047165EF39D7D3FD5A257594D8.taxon	materials_examined	Material examined. United States: ECOSUR- 3006, 2 spec., San Clemente, California, 2,000 m, on whale falls, coll. EE.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047165EF39D7D3FD5A257594D8.taxon	description	Description. Based on the largest specimen: anterior fragment with 172 segments. TL = 66.7 mm, AT = 4.8 mm. Body damaged, depressed, and slender, anterior segments slightly tapered (Fig. 2 A). Body whitish to pale yellow. Notochaetae thick spines, translucent, shiny, inserted on lateral notopodial margins. Prostomium reduced, fused with the first segment, also reduced (Fig. 2 B, D). Lateral antennae reduced inserted on antero-ventral prostomial margin. Median antenna, eyes, and nuchal organs absent. Palps reduced, oval, on posterior margins of the first segment. Mouth fold notched, placed between first and second segment, visible ventrally (Fig. 2 C). Pharynx not exposed, seen by transparency, stylets robust, short. Additional specimen with pharynx exposed with a ring of marginal papillae (Fig. 2 E). Parapodium from segment 69 with notopodium conical, dorsal cirrus short, slightly larger in anterior segments (Fig. 2 F). Notochaetae: thick spines, inserted on lateral notopodial margin, 5 – 13 spines, surrounding notaciculum, each spine with internal horizontal striae and margins slightly denticulate (Fig. 2 G). Notochaetae as long as neuropodium. Largest notochaetae found distally, smallest one in proximal section. Neuropodium conical, twice as long as notopodium. Ventral cirrostyle short inserted over a small cirrophore. Neurochaetae, one group: Unit 1, falcigers heterogomph. Chaetae with long bidentate shafts, distal tip of blades bidentate, straight and long, 5 – 6 times longer than wide, slightly concave (Fig. 2 H – I). Pygidium unknown. Oocyte size: 11.5 – 33.3 µm (n = 6) (Fig. 2 J). Habitat. Bathyal (1,000 – 1,700 m). Specimen collected on whale falls, same as the nominal species recorded by Dahlgren et al. (2004) and Watson et al. (2016).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047165EF39D7D3FD5A257594D8.taxon	distribution	Distribution. Only known from San Clemente Basin, California (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047165EF39D7D3FD5A257594D8.taxon	discussion	Remarks. This specimen resembles Boudemos flokati (Dahlgren, Glover, Baco & Smith, 2004) but some differences were detected. The specimen of B. cf. flokati shows very reduced notopodia, while specimens of B. flokati have a larger notopodium, as long as neuropodium (Dahlgren et al. 2004: 1881, Fig. 5 a). Moreover, the size of the dorsal and ventral cirri on the specimen B. cf. flokati is smaller than those in specimens of B. flokati, being as long as noto- and neuropodia, respectively. The first two anterior segments of B. cf. flokati have a long dorsal cirrus inserted on the margin of the segment, whereas specimens of B. flokati have a short dorsal cirrus inserted submarginally. Recently, Watson et al. (2016) used the neurochaetae and dorsal and ventral cirri to differentiate two Boudemos species, B. flokati and B. ardabilia (Wiklund, Glover, Johannessen & Dahlgren, 2009). These same features were revised in the examined specimens; observations suggest that B. flokati and B. cf. flokati are distinct species. However, the latter morphospecies must be revised using well-preserved and complete specimens to define its status.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF3BD7D3FE8D24CC9569.taxon	description	Figs 3, 12	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF3BD7D3FE8D24CC9569.taxon	materials_examined	Type locality: Monterey, California, United States, among tunicates, seaweed on pier piles (Johnson 1897). Material examined. Eight specimens. Baja California: ECOSUR- 2118, 3 spec. Ensenada, on rocks, December 15, 1982, coll. MA. Baja California Sur: ECOSUR- 2115 Terminal Lagoon, Bahía Concepción, on sand, May 6, 1981, coll. HL; UMAR-Poly 962, El Caimancito Beach, August 13, 1987, coll. RBZ; UANL 6115, RBueno, January 21, 1999, coll. ALG; ECOSUR- 3070, 2 spec. La Marina, 24 º 09.319´N, 110 º 19.630´W, La Paz Bay, on pier piles, 0.5 m, 2 spec. in 250 cm 2, August 14, 2011, coll. TVG & ADL.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF3BD7D3FE8D24CC9569.taxon	description	Description. Based on the best-preserved specimen (ECOSUR- 3070): complete with 24 segments. TL = 1.7 mm, TW = 0.6 mm. Body short, broad, tapered posteriorly (Fig. 3 A). Body pale yellow. Paleae fan translucent, slightly imbricated dorsally. Prostomium visible among the first four segments. Lateral antennae short, inserted on antero-ventral prostomial margin, median antenna slightly shorter than lateral ones, inserted in front of the anterior eyes. Eyes red-violet, two pairs. Nuchal organ small, oblong, partially covering the prostomium (Fig. 3 B). Palps short, oval, visible in ventral view. Mouth fold wide, placed between segment 3 and 4. Pharynx muscular eversible, not exposed, stylets slender. Parapodium from segment 15, notochaetae in three main groups (Fig. 3 E). Notochaetae: lateral group inserted below notaciculum, 1 – 2 paleae, slender and symmetrical, with 6 – 7 internal ribs (Fig. 3 F); subunit 1, 1 palea, slender, shorter and symmetrical, with 7 internal ribs (Fig. 3 G). Main group, 9 – 11 paleae, broad, curved and asymmetrical, with (17) 18 – 19 (21) internal ribs and 3 finely raised ribs (Fig. 3 H). Median group, 3 – 4 paleae, shorter, curved and asymmetrical, with 10 – 12 internal ribs and 3 – 4 raised ribs (Fig. 3 I). All paleae groups are covered with fine denticles over each internal rib. Neuropodium conical, larger than notopodium. Neurochaetae: unit 1, 1 – 3 superior spinigers, blades straight and long, 4 – 5 times longer than wide (Fig. 3 J). Unit 2, 4 – 5 falcigers, blades straight and medium-sized, 3 times longer than wide (Fig. 3 K). Unit 3, 5 – 6 falcigers, blades straight and short, 2 times longer than wide (Fig. 3 L). Unit 4, 4 falcigers, blades straight and short, 2 times longer than wide (Fig. 3 M). Pygidium quadrate, with two anal cirri (Fig. 3 C). Oocyte size: 47.9 – 59.5 µm (n = 3) (Fig. 3 D). Habitat. Intertidal to subtidal (0.5 – 8 m). Specimens of P. bellis were collected on sand, rocks, pier piles, and as epibionts of fouling community. Specimens of this species have been previously recorded on seaweed and among tunicates attached to pier piles (Johnson 1897).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF3BD7D3FE8D24CC9569.taxon	distribution	Distribution. From Monterey, California to La Paz, Baja California Sur (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF3BD7D3FE8D24CC9569.taxon	discussion	Remarks. Examined specimens agree with the original description of P. bellis by Johnson (1897). This species was previously recorded from the southern Mexican Pacific (Cruz-Gómez & Bastida-Zavala 2018); however, this record was mistaken and is now emended through the recognition of a new species described below.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF36D7D3F92722D99776.taxon	description	Figs 4, 12	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF36D7D3F92722D99776.taxon	materials_examined	Type locality: Jiquilisco Estuary, San Juan, El Salvador (Hartmann-Schröder 1959). Material examined. Costa Rica: UMAR-Poly-OH- 020, cruise pier, Puntarenas, on pier piles, 1.5 m, November 22, 2012, coll. TVG; Four specimens, UMAR-Poly-OH- 019, UMAR-Poly-OH- 030, UMAR-Poly-OH- 031, UMAR-Poly-OH- 032, same data as UMAR-Poly-OH- 020.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF36D7D3F92722D99776.taxon	description	Description. Based on the best-preserved specimen (UMAR-Poly-OH- 020): complete with 37 segments. TL = 1.9 mm, TW = 0.5 mm. Body short, broad, tapered posteriorly (Fig. 4 A). Body pale yellow to bright yellow. Paleae fan translucent, slightly imbricated dorsally. Prostomium not visible, completely retracted among the first anterior segments. Palps short, oval visible in ventral view. Mouth fold wide, placed between segment 3 and 4. Pharynx muscular eversible, not exposed, stylets slender. Parapodium from segment 10, notochaetae in three main groups (Fig. 4 B). Notochaetae: lateral group inserted below notaciculum, 4 – 5 paleae, slender and symmetrical, with 3 – 4 internal ribs (Fig. 4 C); subunit 1, 1 palea, slender, shorter and symmetrical, with 6 internal ribs (Fig. 4 D). Main group, 8 – 10 paleae, broad, curved and asymmetrical, with 12 – 16 (17) and 3 finely raised ribs (Fig. 4 E). Median group, 3 – 4 paleae, short, curved and asymmetrical, with 9 – 12 internal ribs and 2 – 3 raised ribs (Fig. 4 F – G). Neuropodium conical, slightly short than notopodium. Neurochaetae: unit 1, 1 – 3 superior spinigers, blades straight and long, 8 – 9 times longer than wide (Fig. 4 H). Unit 2, 4 – 5 falcigers, blades straight and medium-sized, 4 – 5 times longer than wide (Fig. 4 I). Unit 3, 4 – 5 falcigers, blades straight and short, 3 – 4 times longer than wide (Fig. 4 J). Unit 4, 2 – 3 falcigers, blades straight and short, 3 – 4 times longer than wide (Fig. 4 K). Pygidium quadrate, with two anal cirri (Fig. 4 L). Oocytes not seen. Habitat. Intertidal to subtidal (1.5 – 4 m). Specimens of this species were collected on pier piles and previously recorded on limey-sandy (Hartmann-Schröder 1959).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF36D7D3F92722D99776.taxon	distribution	Distribution. From San Juan, El Salvador, to Puntarenas, Pacific Coast of Costa Rica (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047167EF36D7D3F92722D99776.taxon	discussion	Remarks. Hartmann-Schröder (1959) described Paleanotus macrophthalmum (as a member of Chrysopetalum) from El Salvador, including specimens from Costa Rica. Since then, this species was scarcely recorded in the region, mostly included in compilatory checklists (Molina-Lara & Vargas-Zamora 1995, Dean 2004, Rivera & Romero de Rivera 2008). The species should be redescribed, using the holotype and, because the type specimen is in poor conditions (CW Pers. Comm. 2020), topotype specimens should be considered. Recently, Watson (2015) stated that this chrysopetalid was the only tropical species of Paleanotus; however, the conclusion of this study revealed another species (described below) that can be found in the region and inhabits similar substrata. This species is characterized among tropical Paleanotus species by short, narrow main paleae with fine denticulate internal ribs, rounded brow and serrated margins.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716AEF30D7D3FB00244B967A.taxon	description	Figs 5, 12 LSID: urn: lsid: zoobank. org: act: B 4 CD 57 F 4 - 73 BC- 41 EE- 8 FB 4 - 7 CA 6 AD 7 B 4 B 07	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716AEF30D7D3FB00244B967A.taxon	materials_examined	Type locality: Pinitos Beach, Mazatlán, México. Type material. Holotype: ECOSUR- 258, Pinitos Beach, Mazatlán, Sinaloa, México, northern Mexican Pacific, on bivalve, 4 m, March 27, 2004. Paratype: ECOSUR- 259, Cerritos Beach, Mazatlán, Sinaloa, México, northern Mexican Pacific, May 6, 1980, coll. EE. Other material examined. Twenty-five specimens. Baja California Sur: ECOSUR- 3072, La Marina, 24 º 09.319´N, 110 º 19.630´W, La Paz Bay, on pier pile, 0.5 m, 1 spec. in 250 cm 2, August 14, 2011, coll. TVG & ADL; Sonora: ECO- SUR- 3073, Guaymas, 27 ° 54.041´N, 110 ° 51.26´W, on buoys, 0.5 m, 1 spec. in 250 cm 2, August 11, 2011, coll. TVG & MAC; Guerrero: ECOSUR-P 2975, 21 spec. La Quebrada, 16 º 50´47 ” N, 99 º 54´55 ” W, Acapulco, on Muricanthus sp., 6 – 8 m, May 25, 2000, coll. AM; ECOSUR-P 2973, 14 spec., La Quebrada, 16 º 50´47 ” N, 99 º 54´55 ” W, Acapulco, on Pinctada mazatlanica (Hanley, 1856) 6 – 8 m, May 25, 2000, coll. AM; ECOSUR-P 2970, 8 spec. Los Cantiles, approx. 16 º 51´32 ” N, 99 º 55´37 ” W, Acapulco, on bivalves, 5 – 8 m, May 26, 2000 coll. AM. Oaxaca: ECOSUR-PXXX, Corralero Lagoon, 16 º 14´11 ” N, 98 º 11´36 ” W, on algae, 0.3 m, March 22, 2010, coll. EMD; UMAR-Poly-OH- 028, Puerto Ángel, 15 º 39´55 ” N, 96 º 29´28 ” W, on pier piles, 1 m, May 6, 2017, coll. CVG; UMAR-Poly-OH- 029, Santa Cruz Bay, on the exotic soft bryozoan Amathia verticillata (delle Chiaje, 1822), 1 m, April 10, 2018, coll. CCG.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716AEF30D7D3FB00244B967A.taxon	description	Description. Based on the holotype: complete with 41 segments. TL = 4.6 mm, TW = 1.1 mm. Body short, broad, tapered posteriorly (Fig. 5 A). Body whitish to pale yellow. Paleae fan translucent, slightly imbricated dorsally. Prostomium visible between the first two segments. Lateral antennae short, inserted on antero-ventral prostomial margin, median antenna barely longer than lateral ones (only noted on the holotype), inserted in front of the anterior eyes. Eyes red-violet, two pairs. Nuchal organ small, oblong, partially covering the prostomium (Fig. 5 B). Palps short, oval, visible in ventral view. Mouth fold wide, placed between segment 3 and 4. Pharynx muscular eversible, not exposed, stylets slender. Parapodium from segment 23, notochaetae in three main groups (Fig. 5 D). Notochaetae: lateral group inserted below notaciculum, 3 – 7 paleae, slender and symmetrical with 4 – 5 (7) internal ribs (Fig. 5 E); subunit 1, 1 palea, shorter and symmetrical with 4 – 5 internal ribs (Fig. 5 F). Main group, 10 – 11 paleae, broad, curved and asymmetrical with (12) 13 – 15 (16) internal ribs, these paleae intersperse internal ribs following by finely raised ribs (Fig. 5 G – H). Median group, 4 – 5 paleae, long and asymmetrical; the distal-most slightly longer than main paleae, with 13 internal ribs and 3 finely raised ribs; the next proximal shorter with 13 internal ribs and 2 finely raised ribs; the proximalmost, shortest with 10 (11) internal ribs, raised rib absent (Fig. 5 I – J). All paleae groups are covered with denticles over each internal rib. Neuropodium conical, larger than notopodium. Neurochaetae: unit 1, 1 – 2 superior spinigers, blades slightly curved and long, 10 times longer than wide (Fig. 5 K). Unit 2, 3 – 5 falcigers, blades straight and medium-sized, 2 – 3 times longer than wide (Fig. 5 L). Unit 3, 3 – 4 falcigers, blades straight and medium-sized, 3 times longer than wide (Fig. 5 M). Unit 4, 2 – 3 falcigers, blades straight and short, 2 – 3 times longer than wide (Fig. 5 N). Pygidium quadrate, slightly notched with two anal cirri (Fig. 5 C). Oocytes not seen. Habitat. Intertidal to subtidal (0.3 – 8 m). Specimens of P. karlyae n. sp. were collected as epibionts of bivalves Maricanthus sp. and Pinctada mazatlanica, and on the exotic bryozoan Amathia verticillata, as well among fouling communities.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716AEF30D7D3FB00244B967A.taxon	distribution	Distribution. From La Paz, Baja California Sur to Santa Cruz Bay, Oaxaca (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716AEF30D7D3FB00244B967A.taxon	discussion	Remarks. Paleanotus karlyae n. sp. stands out among the Paleanotus distributed in the region due to its notochaetal features. Specimens of P. karlyae n. sp. are recognized by having main paleae narrow, slightly straight, with reduced apex; further, the range of internal ribs is the lowest among TEP species. On the other hand, P. karlyae n. sp. resembles P. aquifolia Watson, 2015, described from Queensland, Australia. Specimens of both species share the same reduced apex and relatively same length of main paleae (Watson 2015: 719, Figs 4 A – C). However, P. karlyae n. sp. differs in having neurochaetal blades broad and strongly falcate, while P. aquifolia has longer, slender blades (Watson 2015: 719, Figs 4 D – H).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716AEF30D7D3FB00244B967A.taxon	etymology	Etymology. This species is named after Karla J. Humara-Gil, aka “ Karly ”, a dear colleague and specialist on brittle stars, as a token of appreciation for her support during many years. She is the bright light that has guided me through the shadows. The epithet is a noun in the genitive case (ICZN 1999, Art. 31.1.2).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716DEF2CD7D3FDC024BC9282.taxon	description	Figs 7, 12 LSID: urn: lsid: zoobank. org: act: 9 A 3 C 9 FD 2 - 2 DAC- 4 EC 8 - BFBF-ACEBD 3 F 97091	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716DEF2CD7D3FDC024BC9282.taxon	materials_examined	Type locality: Coral Beach, Ixtapa Island, Guerrero, México, on dead coral at 1.5 m (Cruz-Gómez & Bastida-Zavala 2018). Material examined. Five specimens. Baja California Sur: ECOSUR- 3218, La Marina, La Paz Bay, 24 º 09.319´N, 110 º 19.630´W, on pier pilings, 50 cm, 1 spec. / 250 cm 2, August 14, 2011, coll. TVG & ADL. Guerrero: UMAR-Poly 935, 3 spec. Coral Beach, 17 º 40´36 ” N, 101 º 39´22 ” W, Ixtapa Island, on dead coral, 1.5 m, September 19, 2007, coll. SGM et al. Oaxaca: UMAR-Poly 936, Corralero Lagoon, 16 º 14´11 ” N, 98 º 11´36 ” W, on sand, June 18, 2009, coll. JMM & JRC.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716DEF2CD7D3FDC024BC9282.taxon	description	Description. Based on the best-preserved specimen (UMAR-Poly 935): complete with 82 segments. TL = 5.3 mm, TW = 0.7 mm. Body long, broad, tapered posteriorly (Fig. 7 A). Body pale orange to bright yellow. Paleae fan translucent, imbricated dorsally. Prostomium visible among the first five segments. Lateral antennae short, inserted on the antero-ventral prostomial margin, median antenna about the same length of lateral ones. Eyes red-violet, two pairs, fused. Nuchal organ, large, not covering the prostomium (Fig. 7 B). Palps short, oval, visible in ventral view. Mouth fold wide, placed between segment 2 and 3. Pharynx eversible, not exposed, stylets slender. Parapodium from segment 22, notochaetae in three main groups (Fig. 7 E). Notochaetae: lateral group inserted below notaciculum, 4 – 6 paleae, slender and symmetrical, with 3 – 6 internal ribs (Fig. 7 F); subunit 1, 1 palea, broad and symmetrical, with 8 – 12 internal ribs (Fig. 7 F, arrow). Main group, 6 – 7 paleae, broad and symmetrical, with 15 – 17 (19) internal ribs and 3 – 5 raised ribs (Fig. 7 G). Median group, 2 – 3 paleae, curved and asymmetrical, with (7) 8 – 11, and 1 – 2 raised ribs (Fig. 7 H – I). All paleal groups are covered with scattered granules. Neuropodium conical, slightly longer than notopodium. Neurochaetae: unit 1, 3 – 4 superior spinigers, blades curved and long, 15 times longer than wide (Fig. 7 J). Unit 2, 4 – 6 falcigers, blades curved and medium-sized, 3 – 4 times longer than wide (Fig. 7 K). Unit 3, 4 – 5 falcigers, blades curved and medium-sized, 3 – 4 times longer than wide (Fig. 7 L). Unit 4, 2 – 4 falcigers, blades curved and short, 5 times longer than wide (Fig. 7 M). Pygidium quadrate, with two anal cirri (Fig. 7 C). Oocyte size: 8.8 – 10.9 µm (n = 5) (Fig. 7 D). Habitat. Intertidal to subtidal (1 – 4 m). Specimens of this species were collected mostly on dead coral, rocks, algae, as epibiont of bivalves and sponges (Cruz-Gómez & Bastida-Zavala 2018), as well as a member of the fouling community.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716DEF2CD7D3FDC024BC9282.taxon	distribution	Distribution. From La Paz Bay, Baja California Sur to La Tijera, Oaxaca (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804716DEF2CD7D3FDC024BC9282.taxon	discussion	Remarks. Perkins (1985) and Watson (2010; 2015) clarified the differences among Treptopale and similar genera, such as Paleanotus and Arichlidon. This morphological proximity led to a mistake by the author in a previous survey. Here, A. watsonae is recognized and proposed as member of Treptopale under the new combination T. watsonae n. comb. Treptopale watsonae n. comb. resembles T. rudolphi Perkins, 1985 from Florida Keys, in having broad main paleae, short palps, and neurochaetal blades long. However, specimens T. watsonae n. comb. have a tapered, short body (<7 mm), while specimens of T. rudolphi have an elongated, long body (> 7 mm) (Perkins 1985; Watson 2010; CCG Pers. Obs.). Furthermore, T. watsonae n. comb. has a distinct large nuchal organ, while T. rudolphi has a barely perceptible nuchal organ (Perkins 1985: 906, Fig. 26 A, C). Regarding notochaetae, T. watsonae n. comb. has subunit 1 broad and symmetrical, and all groups of notochaetae very ornamented with granules, while T. rudolphi has subunit 1 slender and asymmetrical, and the surface of notochaetae rather smooth (Perkins 1985: 906, Fig. 27 A – D; Watson 2010: 41, Fig. 1 A – D). This is the first record of Treptopale from the TEP.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047170EF2ED7D3FDEC2219926E.taxon	description	Figs 8, 12	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047170EF2ED7D3FDEC2219926E.taxon	materials_examined	Type locality: San Clemente Island, California, USA (Watson et al. 2019). Material examined. ECOSUR- 2998, Bahía de los Ángeles, Baja California, México, northern Mexican Pacific, 1 m, February 24, coll. SSV.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047170EF2ED7D3FDEC2219926E.taxon	description	Description. Based on the only specimen found: complete but fragmented with 14 segments. TL = 0.9 mm, TW = 0.3 mm. Body short, broad, truncated posteriorly (Fig. 8 A). Body whitish. Paleae fan translucent, slightly imbricated dorsally. Prostomium barely visible among the first three segments. Lateral antennae, short, inserted on the antero-ventral prostomial margin, median antenna slightly shorter than lateral ones. Eyes red-violet, two pairs, anterior pair massive. Nuchal organ not present (Fig. 8 B). Palps short, oval, visible in ventral view. Mouth fold small, placed between segment 2 and 3. Pharynx muscular and eversible, not exposed, stylets slender. Parapodium from segment 5, notochaetae in two main groups (Fig. 8 D). Notochaetae: lateral spine curved, without internal ribs (Fig. 8 E). Main group, 10 – 12 paleae; lateral-most palea broad and asymmetrical with 16 – 20 internal ribs (Fig. 8 F); mid-most palea curved and asymmetrical with (20) 24 – 26 (27) internal ribs (Fig. 8 G); midline-most palea shorter, slender and asymmetrical with 14 – 18 internal ribs (Fig. 8 H). Median spine absent. All paleae with hooked tips, rounded brow, margins serrated, and denticles on internal ribs. Neuropodium conical, longer than notopodium. Neurochaetae: unit 1, 5 – 8 superior spinigers, blades straight and long, 10 – 12 times longer than wide (Fig. 8 I). Unit 2, 5 – 6 falcigers, blades straight and medium-sized, 6 – 7 times longer than wide (Fig. 8 J). Unit 3, 5 falcigers, blades straight and medium-sized, 5 – 6 times longer than wide (Fig. 8 K). Unit 4, 2 falcigers, blades curved and short, 4 – 5 times longer than wide (Fig. 8 L). Pygidium rounded, with two long anal cirri (Fig. 8 C). Oocytes not seen. Habitat. Intertidal to subtidal (1 m). Specimens of this species have been collected on algae Padina and rumble coral (Cruz-Gómez & Bastida-Zavala 2018; Watson et al. 2019).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047170EF2ED7D3FDEC2219926E.taxon	distribution	Distribution. From San Clemente Island, California, to Bahía de los Ángeles, Baja California and Estacahuite Bay, Oaxaca (Fig. 12). According to Watson et al. (2019), there is a specimen that possibly belongs to H. zerofskii from French Polynesia; morphological differences were noticed and described then, despite these differences it was still considered part of the H. zerofskii ‘ species complex’.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047170EF2ED7D3FDEC2219926E.taxon	discussion	Remarks. Recently Watson et al. (2019) described H. zerofskii from California, previously recorded as Hyalopale sp. (sensu Cruz-Gómez & Bastida-Zavala 2018: 75) from Oaxaca, and so far, this is the only Hyalopale species known on from the Pacific coast of America. The specimen identified here agrees with H. zerofskii however, some differences were noted. The internal ribs in main paleae vary in number along the species distribution: 25 – 26 (27) in specimens from California (Watson et al. 2019), 24 – 26 (27) in specimens from Gulf of California, and 21 – 25 (27) in specimens from the southern Mexican Pacific (Cruz-Gómez & Bastida-Zavala 2018). Further, raised ribs are notorious in small immature specimens (Cruz-Gómez & Bastida-Zavala 2018); in adult specimens, as those revised here, raised ribs are shallow and only noted by having large denticules on their surface. Regarding neurochaetae, here they were illustrated in detail and lead to note some differences from those in small specimens, the main difference is related to their blade length. Adult specimens have neurochaetal blades from all units with relatively the same length as unit 1 blades, whereas small immature specimens have blades with a distinct length according to their dorso-ventral position (Cruz-Gómez & Bastida-Zavala 2018: Fig. 9 B – E).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047172EF28D7D3FE6021949282.taxon	description	Figs 9, 12 urn: lsid: zoobank. org: act: 422895 C 5 - 5465 - 47 C 9 - B 582 - 1 C 539 A 87 E 635	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047172EF28D7D3FE6021949282.taxon	materials_examined	Type locality: Ángel de la Guarda Island, Baja California, Mexico. Type material. Holotype: ECOSUR- 260, on a separated vial, Ángel de la Guarda Island, Baja California, Mexico, Gulf of California, August 15, 1987, coll. MEH. Paratypes: ECOSUR- 260, 10 spec., same data as holotype.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047172EF28D7D3FE6021949282.taxon	description	Description. Based on the holotype: complete with 37 segments. TL = 4.2 mm, TW = 1.2 mm. Body rectangular, tapered posteriorly (Fig. 9 A). Body pale yellow to orange. Paleae fans bright golden, completely imbricated dorsally. Prostomium retracted between the first two segments. Lateral antennae short, inserted on antero-ventral prostomial margin, median antenna slightly shorter than lateral ones. Eyes red-violet, fused, hard to see in specimens with retracted prostomium. Nuchal organ reduced, partially covering prostomium (Fig. 9 B). Palps long, cylindrical, partially visible in dorsal view. Mouth fold wide, placed between segments 3 and 4. Pharynx eversible, not exposed, stylet slender. Parapodium from segment 22, notochaetae in three main groups (Fig. 9 D). Notochaetae: lateral group inserted below notaciculum, two kinds of paleae: first kind, lateral-most paleae, 1 – 2 paleae, slender, straight and symmetrical, with 6 – 8 internal ribs (Fig. 9 E); second kind, mid-most paleae, 3 – 4 paleae, broader, longer, curved and symmetrical, with 14 internal ribs and 1 – 3 raised ribs (Fig. 9 E, arrow). Main group, 15 paleae, broad and symmetrical with 16 – 17 internal finely denticulated ribs (Fig. 9 F). Subunit 1, 1 palea, broad and asymmetrical with 16 internal ribs (Fig. 9 G). Median group, 3 paleae, short and curved; the mid-most, protruding above the main group level, with serrated margins, 12 internal ribs and 1 raised rib (Fig. 9 H). The next proximal smaller with 10 internal ribs and 1 raised rib, and the proximal-most, smallest with 11 internal ribs and 1 raised rib (Fig. 9 I). Neuropodium conical, smaller than notopodium. Neurochaetae: unit 1, 2 – 4 superior spinigers, blades straight and long, 12 times longer than wide (Fig. 9 J). Unit 2, 3 – 5 falcigers, blades straight and medium-sized, 4 times longer than wide (Fig. 9 K). Unit 3, 4 – 6 falcigers, blades straight and medium-sized or short, 3 – 4 times longer than wide (Fig. 9 L – M). Unit 4, 2 – 3 falcigers, blades curved and short, 3 – 5 times longer than wide (Fig. 9 N – P). Pygidium rounded with a ventral cone and two anal cirri (Fig. 9 C). Oocytes not seen.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047172EF28D7D3FE6021949282.taxon	distribution	Distribution. Only known from Ángel de la Guarda Island, Baja California, Gulf of California (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047172EF28D7D3FE6021949282.taxon	discussion	Remarks. This new species shares morphological features with other two species of the genus, Arichlidon hanneloreae Watson Russell, 1998 and A. acropetalon Watson Russell, 1998, both described from northeast Australia. Arichlidon mucropaleum n. sp. resembles A. hanneloreae in the shape of the paleae shoulders of the main paleae; however, A. mucropaleum n. sp. has a larger apical projection in the paleal apex, while A. hanneloreae has a short apical projection in the paleae apex (Watson Russell 1998: 172, Fig. 6 A – D). On the other hand, A. mucropaleum n. sp. shares with A. acropetalon a long apical projection on the apex of the paleae of the main group; however, the paleal shoulders of A. mucropaleum n. sp. is wider than in A. acropetalon, whose shoulders are shorter and rounded (Watson Russell 1998: 172, Fig. 6 E – F). Despite A. mucropealeum n. sp. does not completely resemble A. reyssi (Katzmann, Laubier and Ramos, 1974), a species described from the Adriatic Sea, both species stand out by sharing a long mid-most median palea, protruding above the main group level. However, the detailed observation of this paleal group also demonstrates that both species are different. Arichlidon mucropaleum n. sp. possesses this median palea with lesser number of internal ribs [12 – 13 vs 15 – 17 (18)], further, the paleal apex presents an apical projection, while A. reyssi possesses a higher number of internal ribs and the paleal apex is inconspicuous. Some differences were noted in the subunit 1 of both species. In A. mucropaleum n. sp. the subunit 1 presents a convex proximal margin in the mid paleal level and its apex presents an apical projection; while the subunit 1 in A. reyssi, has the proximal margin uniformly curved in the mid palea level, and lacks apical projection. This is the first record of Arichlidon from the TEP.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047172EF28D7D3FE6021949282.taxon	etymology	Etymology. The specific epithet mucropaleum is a combination of the Latin singular adjective mucronatus (- a, - um) meaning ‘ provide with a final straight point’, and the Latin singular noun palea meaning ‘ scale’. The name indicates the sharp apical projection on the paleal apex of all paleae, and it is neuter for matching the genus gender (ICZN 1999, Art. 31.2).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF28D7D3FE5E2154951E.taxon	type_taxon	Type species: Bhawania myrialepis Schmarda, 1861, by monotypy.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF28D7D3FE5E2154951E.taxon	diagnosis	Diagnosis after Perkins (1985). Chrysopetalinae with body broad, depressed and long (to 200 segments). Paleae fan yellow to golden bright, completely imbricate dorsally, exhibiting mid-dorsal line surface smooth. Prostomium rectangular, laterally fused with the anterior segments. Pharynx with a pair of thick stylet jaws. Segment 1 reduced, dorsal and ventral cirri present; segment 2 reduced and fused with segment 3, dorsal cirri present, ventral cirri absent; segment 3 reduced, dorsal and ventral cirri present. Posterior segments with dorsal and ventral cirri. Dorsal cirri with cirrophores shorts, cirrostyles retractile into cirrophores. Notochaetae symmetrical with internal ribs and horizontal striae; at the apex, the horizontal striae and internal ribs form a fragile reticulate surface. Main paleae with raised ribs with flattened denticles. Pygidium rounded with two anal cirri, with a medial anal cone.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF28D7D3FE5E2154951E.taxon	discussion	Remarks. Schmarda (1861) erected the genus Bhawania and included B. myrialepis described from Sri Lanka as type species. Then, Grube (1868) identified an apparent new form of chrysopetalid and proposed Psectra and described P. obscura (= Bhawania obscura) as its type species; he argued that although this new genus was close to Bhawania, Psectra lacked dorsal cirri; this was an honest mistake advocated to the retraction faculty of the dorsal cirri. Later, Hartman (1959: 127) reassigned Psectra to Bhawania as a minor synonymy. Perkins (1985) redefined the genus Bhawania sensu lato including details of the first segments, prostomial appendages, and paleae. In the same study, he added notes of some species that should be referred as Bhawania. Since then, Watson (1986; 1998) has erected new genera from forms previously referred as Bhawania (e. g. Paleaequor Watson Russell, 1986, Arichlidon Watson Russell, 1998). Traditionally, the genus Bhawania has been recognized as worms with numerous segments, with a small retracted prostomium and lack of nuchal organ (Fauchald 1977 b). These features are still important; however, other features to be considered are: long body with depressed dorsum; dorsum completely covered by bright yellow paleae; paleae fan markedly imbricated over the mid-dorsal line, main paleae with raised ribs with flattened denticles, and all notochaetal groups with a delicate transparent reticular distal end. Bhawania specimens are found inhabiting coarse sand, volcanic rock, dead coral, shell fragments, algae, bryozoans colonies, tubes of sabellariids and chaetopterids, on the dorsal surface of an amphinomid, galleries of coral-boring sipunculans and sponges (Morgado & Amaral 1981; Perkins 1985; Watson & Faulwetter 2017; Cruz-Gómez & Bastida-Zavala 2018).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF2BD7D3F92821179233.taxon	description	Figs 10, 12 LSID: urn: lsid: zoobank. org: act: 9 ADB 2 A 08 - 0 FF 3 - 4 A 41 - 970 E- 567 E 3 F 217162	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF2BD7D3F92821179233.taxon	materials_examined	Type locality: El Faro breakwater, Mazatlán, Sinaloa, México. Type material. Holotype: ECOSUR- 261, prostomium damaged, El Faro breakwater, Mazatlán, Sinaloa, México, northern Mexican Pacific, on rock, 1 m, February 23, 2004, coll. MTH & PSS. Paratype: ECOSUR- 262, same as holotype. Other material examined. Tropical Eastern Pacific: México: Seven spec. Baja California: ECOSUR- 3213 fragments, Bahía de los Ángeles, March 17, 1985, coll. Lalo & Carolina. Baja California Sur: ECOSUR- 3214, fragments, La Paz Bay, February 23, 2004. Nayarit: ECOSUR- 3215, 2 spec. La Manzanilla, 20 º 44´39 ” N, 105 º 23´11 ” W, on rock with sponge and algae, 2 m, November 29, 2004, coll. BY & PSS. Jalisco: ECOSUR- 3216, fragments, Melaque, on rock with algae, 3 m, December 2, 2004, coll. BY & PSS. Michoacán: UMAR-Poly 937, Faro de Bucerías, October 4, 1994, coll. RBZ & SGM. Oaxaca: UMAR-Poly 855, mouth of Chacahua Lagoon, 15 º 57´59 ’’ N, 97 º 40´44 ’’ W, on tubes of sabellariids, 0.5 m, April 3, 2008, coll. JJG. Costa Rica: Eleven spec. Puntarenas: UMAR-Poly-OH- 025, Cabo Blanco, on volcanic rock, 1 m, November 11, 2012, coll. TVG. UMAR-Poly- OH- 023, UMAR-Poly-OH- 022, same as UMAR-Poly-OH- 025. Guanacaste: Seven spec. MAGNT n. n., UMAR- Poly-OH- 016, UMAR-Poly-OH- 021, UMAR-Poly-OH- 024, UMAR-Poly-OH- 026, Cabuyal beach, on dead coral, 0.5 m, November 4, 2012, coll. TVG. Panamá: One spec. Balboa: ECOSUR-P 3217, Punta Culebra, on sponge, May 30, 2002, coll. SSV. Grand Caribbean region: 1 spec. of Bhawania goodei Webster, 1884 Yucatán: ECO- SUR-PXXX, San Felipe, 21 ° 34´16.0 ” N 88 ° 13´40.2 ” W, on rock, 2 – 4 m, February 18, 1999, coll. RBZ & SSV.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF2BD7D3F92821179233.taxon	description	Description. Based on the holotype: complete with 102 segments. TL = 16.2 mm, TW = 1.4 mm. Body long, narrowed, reduced posteriorly (Fig. 10 A). Body orange to brown, reddish along with dorsal and ventral cirri bases. Paleae fan bright yellow to golden, strongly imbricated dorsally. Prostomium damaged. Prostomium from another specimen (ECOSUR- 3215) retracted among the first three segments. Lateral antennae long, inserted on antero-ventral prostomial margin median antenna slightly shorter than lateral ones, inserted in front of the anterior eyes. Eyes red-violet, two pairs. Nuchal organ, conical nuchal fold, partially covering prostomium (Fig. 10 B). Palps long, cylindrical, visible in dorsal view. Mouth fold small, placed between segment 3 and 4 (Fig. 10 C). Pharynx eversible, not exposed, stylet thick. Parapodium from segment 22, notochaetae in three main groups (Fig. 10 D). Notochaetae: lateral group inserted below notaciculum, 10 – 13 paleae, slender and asymmetrical with (2) 3 – 5 (7) internal ribs, barely seen (Fig. 10 E); subunit 1, 1 – 2 paleae, symmetrical with (5) 6 – 7 (8) internal ribs and serrated margins (Fig. 10 F). Main group, 11 – 13 paleae, broad and symmetrical, with (16) 18 – 21 (22) internal ribs and 3 raised ribs (Fig. 10 G). Median group, 3 paleae, short, very broad and symmetrical; the distal-most palea with 12 – 14 internal ribs and (3) 4 raised ribs; the next proximal palea smaller with 14 internal ribs and 4 raised ribs, and the proximal-most, smallest with (13) 14 – 16 internal ribs and (2) 3 – 4 raised ribs (Fig. 10 H – I). Neuropodium conical, smaller than notopodium. Neurochaetae: unit 1, 2 – 4 superior spinigers, blades straight and long, 9 – 10 times longer than wide (Fig. 10 J). Unit 2, 4 – 5 falcigers, blades straight and medium-sized, 2 – 3 times longer than wide (Fig. 10 K). Unit 3, 4 – 6 falcigers, blades straight and short to medium-sized, 2 – 3 times longer than wide (Fig. 10 L). Unit 4, 2 – 3 falcigers, blades straight and short, 2 – 3 times longer than wide (Fig. 10 M). Pygidium rounded with a ventral cone and two subulate anal cirri (Fig. 10 N). Oocytes not seen. Habitat. Intertidal to subtidal (1 – 3 m). Specimens of this species were collected mainly on rocks, volcanic rock, dead coral, and as epibionts of algae, sponges, and tubes of sabellariids (Cruz-Gómez & Bastida-Zavala 2018).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF2BD7D3F92821179233.taxon	distribution	Distribution. From Bahía de los Ángeles, Baja California, México to Punta Culebra, Balboa, Panamá (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF2BD7D3F92821179233.taxon	discussion	Remarks. In the Pacific coast of tropical America, the genus Bhawania has been repeatedly recorded as B. goodei Webster, 1884, a species with natural distribution in the Grand Caribbean. The latter is comprehensible; the Bhawania morphology is quite similar among species, which makes it difficult to separate from each other. However, a comparison of the TEP material with non-type specimens of B. goodei from the Grand Caribbean region, along with observations by Webster (1884), Perkins (1985), and Watson (Pers. Comm. 2020) revealed subtle but consistent disparities (Table 1). Differences were noticed once middle region segments were dissected. Bhawania bastidai n. sp. have neuropodia shorter than notopodia, with a short neuracicular lobe, 1 / 2 neuropodia length; while B. goodei have larger neuropodia, as long as notopodia, with large neuroacicular lobe, 1 / 3 neuropodia length. This consistent feature was noted in similar size mature specimens; moreover, notes and drawings made by Webster (1884: Plate VII, Fig. 11) help to confirm this. The distinct characters that help to separate both species are found in the main paleae. Specimens of B. bastidai n. sp. possess slightly slender main paleae, with a higher number of internal ribs; while specimens of B. goodei possess broader main paleae, with a lower number of internal ribs (18 – 21 vs 16 – 18). Despite the evident overlap of the numbers of internal ribs, the consistency of the ranges between these species leads to separate them.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047174EF2BD7D3F92821179233.taxon	etymology	Etymology. This species is named after J. Rolando Bastida-Zavala, a dear colleague, friend, and my first academic guide on polychaetes, as recognition of his great labor on polychaetes in México and his tireless effort to build new Mexican taxonomists on marine invertebrates. The epithet is a noun in the genitive case (ICZN 1999, Art. 31.1.2).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047177EF25D7D3FAFF212F9478.taxon	description	Figs 11, 12	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047177EF25D7D3FAFF212F9478.taxon	materials_examined	Type locality: Gulf of Nicoya, Costa Rica, on sand at 44 m (Watson Russell 1986). Material examined. Seven specimens. Costa Rica: Two spec. Puntarenas: UMAR-Poly-OH- 018, cruise pier, on pier piles, 1.5 m, November 22, 2012, coll. TVG. Guanacaste: UMAR-Poly-OH- 027, Cabuyal beach, on dead coral, 0.5 m, November 3, 2012, coll. TVG. Perú: Five spec. Piura: UMAR-Poly 953, 3 spec. Vichayo, 5 ° 47´56 ” S, 80 ° 56´48 ” W, on shells, 0.5 m, 2014, coll. IC. Tumbes: UMAR-Poly 954, 2 spec. Corvina, 3 ° 62´76 ” S, 80 ° 70´76 ” W, in mud, 15 m, 2012.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047177EF25D7D3FAFF212F9478.taxon	description	Description. Based on the best-preserved specimens (UMAR-Poly 954): complete with 57 segments. TL = 6.3 mm, TW = 0.8 mm. Body long, slender, tapered posteriorly (Fig. 11 A). Body pale orange. Paleae fan translucent, imbricated dorsally. Prostomium visible among the first four segments. Lateral antennae short, inserted on the antero-ventral prostomial margin, median antenna about the same length of lateral ones, inserted in front of the first pair of eyes. Eyes red-violet, two pairs. Nuchal organ, small, partially covering the prostomium (Fig. 11 B). Palps long, cylindrical, visible in ventral view. Mouth fold small, placed between segment 2 and 3. Pharynx eversible, not exposed, stylets thick. Parapodium from segment 20, notochaetae in three main groups (Fig. 7 E). Notochaetae: lateral group inserted below notaciculum, 2 – 6 paleae, slender and symmetrical, with 5 – 8 internal ribs (Fig. 11 E); subunit 1, 1 palea, slender and symmetrical, with 9 – 15 internal ribs, and margins finely serrated (Fig. 11 F). Main group, 20 – 26 paleae, broad and symmetrical, with (14) 16 – 19 internal ribs, and 4 – 5 raised ribs (Fig. 11 G). Median group, 3 – 4 paleae shorter, broad, symmetrical, with (12) 13 – 20 internal ribs and 2 – 4 raised ribs (Fig. 11 H). Neuropodium conical, slightly longer than notopodium. Neurochaetae: unit 1, 2 – 4 superior spinigers, blades straight and long, 12 – 14 times longer than wide (Fig. 11 I). Unit 2, 2 – 4 falcigers, blades straight and medium-sized, 6 – 7 times longer than wide (Fig. 11 J). Unit 3, 4 – 5 falcigers, blades straight and medium-size, 4 – 5 times longer than wide (Fig. 11 K – L). Unit 4, 2 – 3 falcigers, blades straight and short, 3 times longer than wide (Fig. 11 M). Pygidium rounded with two anal cirri, and a reduced ventral cone (Fig. 11 C). Oocytes not seen. Habitat. Intertidal to subtidal (0.5 – 15 m). Specimens of P. nicoyensis were collected in mud, shells, dead coral, among the fouling communities; also, previously recorded on coarse sand (Watson Russell 1986).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047177EF25D7D3FAFF212F9478.taxon	distribution	Distribution. From Gulf of Nicoya, Costa Rica to Corvina, Perú (Fig. 12).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047177EF25D7D3FAFF212F9478.taxon	discussion	Remarks. Examined specimens of P. nicoyensis agree with the original description by Watson Russell (1986); however, intraspecific differences were detected. Specimens from Perú have a lower number of paleae on every group of paleae, possibly associated with the size, since these specimens were smaller than those collected from Costa Rica.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717AEF26D7D3FF3D220D94F6.taxon	description	Figs 13, 26	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717AEF26D7D3FF3D220D94F6.taxon	materials_examined	Type locality: Punta Pelícano, Sonora, Gulf of California, at 13 m (Watson Russell 1986). Material examined. Seventy-one specimens. Baja California: ECOSUR- 2982, 3 spec. Bahía de Los Ángeles, May 25, 1986, coll. SSV. Baja California Sur: ECOSUR- 2113, 2 spec. Bahía Concepción, June 17, 1980, coll. RR; ECOSUR- 2114, 3 spec. Bahía Concepción, May 6, 1981, coll. HL; ECOSUR- 2112, 3 spec. El Coyote, Bahía Concepción, April 8, 1982, on coral, coll. EGV; UANL 003670, Bahía Concepción, July 18, 1985, coll. ALG; UANL 0047, Bahía Concepción, July 20, 1985, coll. ALG; UANL 0048, 3 spec. Bahía Concepción, July 20, 1985, coll. SSV; ECOSUR- 2976, El Presidente Beach, La Paz Bay, October 10, 1987, coll. SSV; UMAR-Poly 955, El Presidente Beach, April 20, 1988, col. RBZ; UMAR-Poly 956, 4 spec. El Caimancito Beach, April 20, 1988, coll. RBZ; UMAR-Poly 957, Armenta, Bahía Concepción, on Sargassum sp., coll. RBZ; ECOSUR- 3005, El Caimancito Beach ,, La Paz Bay, February 29, 2004; ECOSUR- 2977, 10 spec. La Paz Bay, 0.7 m, March 1, 2004; ECOSUR- 2989, 2 spec. La Paz Bay, 1 m, March 2, 2004; ECOSUR- 3068, La Marina, 24 º 09.319´N, 110 º 19.630´W, La Paz Bay, on pier piles, 0.5 m, 1 spec. in 250 cm 2, August 14, 2011, coll. MAC & IRS; ECOSUR- 3071, 3 spec. La Marina, 24 º 09.319´N, 110 º 19.630´W, La Paz Bay, on pier piles, 0.5 m, 3 spec. in 250 cm 2, August 14, 2011, coll. TVG & ADL. Nayarit: ECOSUR- 2995, 5 spec. Punta Borrego, on bivalve, 1 m, November 23, 2004; ECOSUR-P 3002, 3 spec. Punta Borrego, on bivalve, 2 m, November 24, 2004; ECOSUR- 3212, La Cruz, on rocks, 0.3 m, November 26, 2004, coll. BY & PSS; ECOSUR- 2938, 7 spec. La Manzanilla, on rock with sponge, 2 m, November 29, 2004, coll. BY & PSS. Jalisco: ECOSUR- 2979, 2 spec. Melaque, on rocks with sand, 1 m, December 1, 2004, coll. BY & PSS; ECOSUR- 2978, 2 spec. andador, Melaque, on rocks, 3 m, December 2, 2004, coll. BY & PSS; ECOSUR- 2980, 2 spec. San Pedro Channel, rock with coral, 5 m, June 26, 2013, coll. BY. Michoacán: UMAR-Poly 958 Caleta de Campos, December 17, 1994, coll. RBZ; UMAR-Poly 959, 6 spec. Caleta de Campos, December 20, 1998, coll. RBZ. Perú: One spec. UMAR-Poly 960, Albacora, Tumbes, 3 ° 64´78 ” S, 80 ° 74´34 ” O, on mud, 8 m, 2012; UMAR- Poly 961, Corvina, Tumbes, 3 ° 62´76 ” S, 80 ° 70´76 ” O, on mud, 15 m, 2012.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717AEF26D7D3FF3D220D94F6.taxon	description	Description. Based on the best-preserved specimen (ECOSUR- 3068): complete with 104 segments. TL = 7.1 mm, TW = 1.3 mm. Body long, slender, tapered posteriorly (Fig. 13 A). Body pale orange to bright orange. Paleae fan translucent, imbricated dorsally. Prostomium visible among the first four segments. Lateral antennae short, inserted on the antero-ventral prostomial margin, median antenna slightly short than lateral ones, inserted in front of the first pair of eyes. Eyes redviolet, two pairs. Nuchal organ, small, partially covering the prostomium (Fig. 13 B). Palps long, cylindrical, visible in ventral view. Mouth fold small, placed between segment 2 and 3. Pharynx eversible, not exposed, stylets thick. Parapodium from segment 15, notochaetae in three main groups (13 E). Notochaetae: lateral group inserted below notaciculum, 3 – 5 paleae, slender and symmetrical, with 4 – 7 ribs (Fig. 13 F); subunit 1, two kinds of paleae: subunit 1 a, broad and symmetrical, with 8 internal ribs and serrated margins; subunit 1 b, larger, broad and symmetrical, with 14 internal ribs (Fig. 13 G). Main group, 15 – 17 paleae, broad and symmetrical, with 17 – 22 internal ribs and (3) 4 – 6 raised ribs (Fig. 13 H). Median group, 3 paleae, shorter, broad and symmetrical, with 14 – 22 internal ribs and (0) 3 – 5 raised ribs (Fig. 13 I). Neuropodium conical, slightly shorter than notopodium. Neurochaetae: unit 1, 1 – 2 superior spinigers, blades curved and long, 20 times longer than wide (Fig. 13 J). Unit 2, 3 – 4 falcigers, blades curved and medium-sized, 5 – 6 times longer than wide (Fig. 13 K). Unit 3, 4 – 6 falcigers, blades curved and medium-sized, 2 – 4 times longer than wide (Fig. 13 L – M). Unit 4, 2 – 3 falcigers, blades curved and short, 2 – 3 times longer than wide (Fig. 13 N). Pygidium rounded with two anal cirri, and a large ventral cone (Fig. 13 C). Oocyte size: 15 – 25 µm (n = 6) (Fig. 13 D). Habitat. Intertidal to subtidal (0.5 – 20 m). Specimens of P. psamathe were collected on rock, sand, mud, as epibiont of bivalves, coral, and among the fouling communities. This species has been also recorded as epibiont of algae, sponges, and in tubes of terebellids and chaetopterids (Watson Russell 1986; Cruz-Gómez & Bastida-Zavala 2018).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717AEF26D7D3FF3D220D94F6.taxon	distribution	Distribution. From Bahía de los Ángeles, Baja California to Albacora, Perú (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717AEF26D7D3FF3D220D94F6.taxon	discussion	Remarks. Specimens from México and Perú shared the same features and agree with the description and illustrations by Watson Russell (1986).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717CEF21D7D3FF3D21A99112.taxon	type_taxon	Type species. Bhawatsonia fusa n. sp.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717CEF21D7D3FF3D21A99112.taxon	diagnosis	Diagnosis. Chrysopetalinae with body broad, rectangular and long (to 400 segments). Paleae fan pale maroon to bright golden, partially imbricate dorsally, most specimens exhibiting mid-dorsal line free of paleae in middle segments. Prostomium rectangular, laterally fused with the anterior segments. Pharynx with a pair of thick stylet jaws. Segment 1 reduced and dorsally fused with segment 2, dorsal and ventral cirri present; segment 2 reduced and fused with segment 3, dorsal cirri present, ventral cirri absent; segment 3 reduced, dorsal and ventral cirri present. Posterior segments with dorsal and ventral cirri. Dorsal cirri with cirrophores large, cirrostyle non-retractile. Notochaetae symmetrical with internal ribs and horizontal striae on the paleal surface. Main paleae with raised ribs with denticles. Pygidium bulbous with two anal cirri, with a medial anal cone.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717CEF21D7D3FF3D21A99112.taxon	etymology	Etymology. The genus is named after Charlotte Watson, a specialist in chrysopetalids, in recognition of her contribution to the study of these marine annelids, and for her valuable comments and support during this research. The name also refers to Bhawania, the genus to which the new genus seems to be closest. The name is a combination of Bhawania, and the last name of Charlotte, but in order to make it more euphonic, the last three letters of the genus-group name were removed and the Latin suffix ‘ ia’, feminine indicative, was added. Gender. Feminine.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717CEF21D7D3FF3D21A99112.taxon	discussion	Remarks. Bhawatsonia n. gen. includes species previously known as Paleanotus purpurea Rioja, 1947 and Bhawania riveti Gravier, 1908, and three other new species. The members of the new genus share the following features: maroon to violet body, long body, numerous segments, anterior segments retractile, dorsal cirrophores massive, and symmetrical paleae. Combination of these features could lead to confusion within other related genera such as Bhawania and Paleaequor. Among Chrysopetalinae, Bhawatsonia n. gen. resembles Bhawania and Paleaequor in having long bodies with numerous segments, anterior segments retractile, and symmetrical paleae. However, specimens of Bhawatsonia n. gen. have longer bodies, measuring between 6.7 mm and 120 mm in length, with to 400 segments and rectangular body shape, whereas the largest specimens recorded of Bhawania do not exceed 70 mm in length, with up to 220 segments (Schmarda 1861), and the one of Paleaequor do not exceed 20 mm, with 120 segments (Watson Russell 1986), and in both genera specimens have depressed bodies. Furthermore, specimens of Bhawatsonia n. gen. present non-imbricated paleae fan along the mid-dorsal line in most of the specimens, and notopodia possess a massive dorsal cirrophore with non-retractile cirrostyle, while specimens of Bhawania and Paleaequor exhibit their paleae fan imbricated over the dorsum and their dorsal rami with retractile cirrostyles into reduced cirrophores (Perkins 1985; Watson Russell 1986). Regarding notochaetae, the main difference is found in the tip of the paleae. Members of Bhawatsonia n. gen. have the paleal apex thick and entire, with its internal ribs and horizontal striae extended to it; meanwhile, Bhawania has the apex delicate and often eroded, with its internal ribs and horizontal striae turned into a reticulated surface, and Paleaequor has the paleal apex hyaline and entire, with its internal ribs barely extended in the hyaline section. Moreover, between Bhawania and Bhawatsonia n. gen. the denticulation also differs; denticulation in the paleae of Bhawatsonia n. gen. if present, is fine, barely seen and sharp, while in Bhawania it is obvious and flattened. The new features considered here are stiffness and body color. Chrysopetalins are usually fragile worms with pale orange to bright yellow bodies; but as a novelty, the new genus members are stiff worms with maroon to violet bodies. The former was noticed during the preparation of the slides. Most of Chrysopetalinae members are fragile worms that can break easily, which make easier the dissection of a segment, by only pulling out the segment using a fine needle or fine tweezers. Nevertheless, the fragmentation of specimens of Bhawatsonia n. gen. is rare, and the dissection of a segment required a razor to obtain the complete segment, most likely due to the thickness of the ventral longitudinal muscular fibers (Fig. 16 A). Several authors indicated some species previously assigned to Bhawania, Paleanotus or Chrysopetalum could be regarded as members of a new group. Monro (1933) recognized that “ C. ” riveti shared more features with Bhawania than with Chrysopetalum and suggested the new combination as “ B. ” riveti. Later, Perkins (1985) suggested that Paleanotus purpurea should be transferred to Bhawania because of its retractile prostomium. Watson Russell (1991) discussed the similarities of “ C. ” riveti with Strepternos Watson Russell, 1991 and indicated that this species belonged to a new genus. Now is clear that “ Chrysopetalum ” riveti belong to the new genus, but this must be formalized through the proposal of a neotype and its description and illustration of topotype material, because the type material is lost (CW Pers. Comm. 2020). More recently, Charlotte Watson (Pers. Comm. 2017) suggested that Bhawania goodei and “ Bhawania ” riveti should be considered two different species complexes. Here, these two groups are referred as from two genera, Bhawania sensu stricto, and Bhawatsonia n. gen. Hitherto, the new genus appears to be restricted in the TEP; however, it may also be present in the Grand Caribbean region. Records of B. purpurea n. comb. (as P. purpurea) and “ C. ” riveti (as B. riveti) in the Caribbean (Rullier 1974; Cubit & Williams 1983) could indicate the presence of specimens of Bhawatsonia n. gen. in the Caribbean region. Either way, the revision of specimens identified as Bhawania and Paleaequor deposited in scientific collections in the world could indeed, belong to this new genus. Bhawatsonia n. gen. specimens are found inhabiting rocks, sand, dead and living coral, bivalves and pier piles, or inside of sand tubes of other polychaetes (Fig. 17 B – D) (Monro 1933; Rioja 1945; Fauchald 1997; Cruz-Gómez & Bastia-Zavala 2018).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717DEF23D7D3FD2B21C09462.taxon	description	Figs 14 – 15, 26 LSID: urn: lsid: zoobank. org: act: 2 F 7115 F 8 - 50 BE- 4897 - A 849 - 4 ADC 85 C 2860 F	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717DEF23D7D3FD2B21C09462.taxon	materials_examined	Type locality: Aticama, Nayarit, México. Type material. Holotype: ECOSUR- 263, Aticama, Nayarit, México, northern Mexican Pacific, on bivalve, 2 m, November 25, 2004. Paratype: ECOSUR- 264, same as holotype. Other material examined. Six specimens. Baja California: ECOSUR- 3219, 2 spec. Bahía de los Ángeles, May 25, 1986, coll. SSV. Baja California Sur: ECOSUR- 3220, El Presidente, La Paz Bay, October 4, 1987, coll. SSV & ALG; ECOSUR- 3221, 2 spec. El Presidente, La Paz Bay, October 10, 1987, coll. SSV. Jalisco: ECOSUR- 3222, 2 spec. Barra de Navidad, on rock, 4 m, December 3, 2004, coll. BY & PSS.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717DEF23D7D3FD2B21C09462.taxon	description	Description. Based on the holotype: complete with 74 segments. TL = 8 mm, TW = 1.8 mm. Body stiffed, long, narrowed posteriorly (Fig. 14 A). Body orange to brown, dorsal and ventral cirri bases darker (Fig. 14 G). Paleae fan bright maroon to golden, non-imbricated dorsally. Prostomium retracted among the first four segments. Lateral antennae long, inserted on antero-ventral prostomial margin, median antenna slightly shorter than lateral ones, inserted in front of anterior eyes. Eyes red-violet, two pairs. Nuchal organ, semicircular nuchal fold, partially covering prostomium (Fig. 14 B, D). Palps short, ovoid, visible only in ventral view. Mouth fold small, placed between segment 3 and 4 (Fig. 14 C, E). Pharynx eversible, not exposed, stylet thick. Parapodium from segment 49, notochaetae in three main groups (Fig. 14 H). Notochaetae: lateral group inserted below notaciculum, 1 paleae, very slender and symmetrical, with 1 – 2 (3) internal ribs (Fig. 14 I); subunit 1, 1 palea, slender and symmetrical, with 9 – 10 (11) internal ribs (Fig. 14 J). Main group, 7 – 9 paleae, broad and symmetrical, with (14) 15 – 18 (20) internal ribs and 4 – 5 finely raised ribs (Fig. 14 K). Median group, 3 paleae, shorter, slender and asymmetrical; the distal-most palea with 10 – 11 internal ribs and 3 raised ribs; the next proximal palea smaller with (8) 10 internal ribs and 1 raised rib, and the proximal-most and smallest with 8 internal ribs and 1 raised rib (Fig. 15 A – B). All paleae with serrated margins. Neuropodium conical, smaller than notopodium. Neurochaetae: unit 1, 2 superior spinigers, blades straight and long, 15 – 16 times longer than wide (Fig. 15 C). Unit 2, 6 falcigers with blades straight and short, 1 – 2 times longer than wide (Fig. 15 D). Unit 3, 4 falcigers with blades straight and short, 2 times longer than wide (Fig. 15 E – F). Unit 4, 2 falcigers with blades straight and medium-sized, 5 – 6 times longer than wide (Fig. 15 G). Blades bidentate, bent distally. Pygidium conical with two anal cirri (Fig. 15 H). Oocytes not seen. Habitat. Subtidal (2 – 4 m). Specimens of this species were collected mainly on rocks, and as epibionts of bivalves.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717DEF23D7D3FD2B21C09462.taxon	distribution	Distribution. From Bahía de los Ángeles, Baja California to Barra de Navidad, Jalisco (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717DEF23D7D3FD2B21C09462.taxon	discussion	Remarks. Bhawatsonia fusa n. sp., along with Bhawatsonia sp., belongs to the Bhawatsonia n. gen. members with broad main paleae and slender median paleae. Specimens of those species can be differentiated by the form of the main paleae; in B. fusa n. sp. specimens have broader main paleae, whereas specimens of Bhawatsonia sp. have slightly slender main paleae. In addition, subunit 1 appears to be taxonomically relevant in the members of the new genus. Specimens of B. fusa n. sp. have the subunit 1 with a rounded tip, and a range of internal ribs of 9 – 10, maximum of 12; whereas, specimens of Bhawatsonia sp. have the subunit 1 with an acute tip, and a range of internal ribs of 12 – 13, maximum of 14. Occurrence with specimens of B. purpurea n. comb. is common; however, both species are different. Bhawatsonia fusa n. sp. possess subunit 1 broad, with slightly higher rib number, 9 – 10, maximum 11; while B. purpurea n. comb. possess subunit 1 slender, with 8 – 10 internal ribs. Further, the main paleae of B. fusa n. sp. is clearly broader and shorter with slightly reduced rib number, 15 – 18, maximum 20 internal ribs; meanwhile, B. purpurea n. sp. possesses slender and longer main paleae with 17 – 18, maximum 23 interna ribs.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804717DEF23D7D3FD2B21C09462.taxon	etymology	Etymology. The specific epithet is made after the Latin singular adjective fusa (- us, - um) meaning ‘ broad’. The name indicates the broad shape of upper middle section of the main paleae, and it is feminine for matching the genus gender (ICZN 1999, Art. 32.2).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047140EF1ED7D3FF3D25BE9410.taxon	description	Figs 16 – 17, 26	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047140EF1ED7D3FF3D25BE9410.taxon	materials_examined	Type locality: El Mogote, La Paz Bay, Baja California Sur. Neotype locality: El Caimancito Beach, La Paz Bay, Baja California Sur. Type material. Neotype: ECOSUR- 265, El Caimancito Beach, La Paz Bay, Baja California Sur, México, Gulf of California, on rock, 1 m, March 2, 2004, coll. MTH & PSS. Paraneotypes: ECOSUR- 266, 3 spec. same data as holotype. ECOSUR- 267, 3 spec. El Presidente, La Paz Bay, October 10, 1987, coll. SSV. Additional material. Twenty specimens. Baja California: ECOSUR- 2120, 2 spec. Cerro Tiburones, May 7, 1981, coll. HA; ECOSUR- 2988, 2 spec. Bahía de Los Ángeles, March 17, 1985, coll. Lalo & Carolina; ECO- SUR-PXXX, 3 spec. Bahía de Los Ángeles, May 25, 1986, coll. SSV. Baja California Sur: ECOSUR- 2992, El Caimancito Beach, La Paz Bay, on rocks, 1 m, March 2, 2004, coll. MTH & PSS; ECOSUR- 2984, La Paz Bay, 1 m, March 2, 2004.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047140EF1ED7D3FF3D25BE9410.taxon	description	Description. Based on the neotype: complete with 87 segments. TL = 15.1 mm, TW = 2.7 mm. Body stiffed, long, narrowed posteriorly. Body dark violet to brown, dorsal and ventral cirri bases darker (Fig. 16 A). Paleae fan bright maroon to bright golden, non-imbricated dorsally. Prostomium retracted among the first six segments. Lateral antennae long, inserted on antero-ventral prostomial margin, median antenna slightly shorter than lateral ones, inserted in front of anterior eyes. Eyes red-violet, two pairs. Nuchal organ, semicircular nuchal fold, partially covering prostomium (Fig. 16 B). Palps short, ovoid, visible only in ventral view. Mouth fold small, placed between 3 and 4 segments. Pharynx eversible, not exposed, stylets thick. Parapodium from segment 51, notochaetae in three main groups (Fig. 16 E). Notochaetae: lateral group inserted below notaciculum, 1 – 2 paleae, very slender and symmetrical, with 2 – 3 internal ribs (Fig. 16 F); subunit 1, 1 – 2 paleae, slender and symmetrical with 8 – 10 internal ribs (Fig. 16 G). Main group, 11 – 15 paleae, broad and symmetrical, with 17 – 21 (23) internal ribs and slightly serrated margins (Fig. 16 H). Median group, 3 paleae short, wide, asymmetrical, margins serrated; the distal-most palea with 12 – 14 (16) internal ribs and 3 raised ribs, the next proximal palea smaller with 11 – 12 internal ribs, and the proximal-most and smallest with 10 internal ribs (Fig. 16 I). Neuropodium conical, larger than notopodium. Neurochaetae: unit 1, 2 superior spinigers, blades straight and long, 10 – 11 times longer than wide (Fig. 16 J). Unit 2, 7 – 9 falcigers, blades straight and short, 2 – 3 times longer than wide (Fig. 16 K). Unit 3, 3 – 7 falcigers, blades straight and short, 3 – 4 times longer than wide (Fig. 16 L – M). Unit 4, 2 falcigers, blades straight and medium-sized, 6 – 7 times longer than wide (Fig. 16 N). Blades bidentate, bended distally. Pygidium regenerated, rounded with two anal cirri (Fig. 16 C; 17 A). Oocyte size: 11.5 – 14.6 µm (n = 4) (Fig. 16 D). Habitat. Intertidal to subtidal (1 – 6.1 m). Specimens of B. purpurea n. comb. were collected on rocks and previously as epibiont of stony coral, and bivalves as Spondylus sp. and Pinna sp. (Rioja 1947; Cruz-Gómez & Bastida-Zavala 2018). One complete specimen from La Paz Bay (ECOSUR- 2992) was found inside of a sand tube (Fig. 17 B – D).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047140EF1ED7D3FF3D25BE9410.taxon	distribution	Distribution. From Cerro Tiburones, Baja California to La India Beach, Oaxaca (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047140EF1ED7D3FF3D25BE9410.taxon	discussion	Remarks. Bhawatsonia purpurea n. comb. is a chrysopetalid rarely recorded, but its records include both coast of America: in the Pacific side from Baja California Sur (Rioja 1947) and Oaxaca (Cruz-Gómez & Bastida-Zavala 2018), and in the Caribbean, from Cuba (Rullier 1974). However, the latter record needs to be confirmed. This species has a complicated taxonomic history (summarized by Cruz-Gómez & Bastida-Zavala 2018), mainly due to the supposed relevant features considered in the original description, such as the prostomium, based on which it was established in Paleanotus (Rioja 1947). When other features were considered, like the numerous segments, paleae, and body shape, it was related to Bhawania (Perkins 1985). Until this study, the generic status of the species was not clear. In addition, type material designated by Rioja is currently lost (Salazar-Vallejo 1989) (ICZN 1999, Art. 75.3.4). In order to solve the taxonomic status of B. purpurea n. comb., designation of a neotype was necessary (ICZN 1999, Art. 75.1; Art. 75.3.1). The specimen selected as neotype fits with the original description by Rioja (1947) (ICZN 1999, Art. 75.3.3); specimens features were described, illustrated and, compared to related species (ICZN 1999, Art. 75.3.2). Because the type locality (El Mogote, La Paz Bay) has been modified (ICZN 1999, Art. 76.3), the neotype specimen was collected nearby (El Caimancito Beach, La Paz Bay) approximately 4 km from the type locality, thus the environmental conditions were similar (ICZN 1999, Art. 75.3.6). The neotype, paraneotypes and non-type specimens were deposited in the reference collection at ECOSUR (ICZN 1999, Art. 75.3.7). Specimens of B. purpurea n. comb. resemble those of B. nenoae n. sp. in having slender main paleae and broad median paleae. However, specimens of B. purpurea n. comb. have main paleae with consistent width along the margins and narrower shoulders, whereas B. nenoae n. sp. has main paleae with their upper middle section broader, and wider shoulders. Regarding subunit 1 paleae, specimens of B. pupurea n. comb. possess a slender palea with a range of 8 – 10 internal ribs, while specimens of B. nenoae n. sp. possess a broader palea with a range of 12 – 14 internal ribs. Further, some specimens of B. purpurea n. comb. stand out among Bhawatsonia n. gen., and other Chrysopetalinae genera, in having the largest specimens with numerous segments, up to 400. A paratype from La Paz Bay (ECOSUR- 266) was the largest one examined; it has a total length of 12.64 cm and up to 400 segments.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047143EF1FD7D3FF3D22669647.taxon	description	Figs 18, 26 LSID: urn: lsid: zoobank. org: pub: F 0 D 7412 B- 5968 - 4459 - 9 BA 4 - F 1 A 314 BA 8 EC 7	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047143EF1FD7D3FF3D22669647.taxon	materials_examined	Type locality: Hornos Beach, Acapulco, Guerrero, México. Type material. Holotype: ECOSUR- 269, Hornos Beach, 16 ° 51´6 ” N, 99 ° 54´1 ” W, Acapulco, Guerrero, México, southern Mexican Pacific, on Spondylus sp. April 19, 2008, coll. SSV & LCP.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047143EF1FD7D3FF3D22669647.taxon	description	Description. Based on the holotype: complete with up to 300 segments. TL = 38 mm, TW = 2.3 mm. Body stiffed, long, narrowed posteriorly (Fig. 18 A). Body pale violet to brown, dorsal and ventral cirri bases darker. Paleae fan bright maroon to golden, non-imbricated dorsally. Prostomium completely retracted among the first six, caused by the fixation method. Antennae, prostomium, nuchal organ not seen; eyes barely noticed. Palps long, cylindrical, visible only in ventral view. Mouth fold small, placed between segment 3 and 4. Pharynx eversible, not exposed and not detected by transparency. Parapodium from segment 142, notochaetae in three main groups (Fig. 18 B). Notochaetae: lateral group inserted below notaciculum, 2 paleae, very slender and symmetrical, with 2 internal ribs (Fig. 18 C); subunit 1, 1 palea, broader and symmetrical, with 12 – 14 internal ribs (Fig. 18 D). Main group, 14 – 16 paleae, broader and symmetrical, with 18 – 20 internal ribs (Fig. 18 E). Median group, 2 paleae, curved, shorter and asymmetrical; the distal-most palea with 13 internal ribs and, the proximal-most and smallest with 13 internal ribs (Fig. 18 F – G). Neuropodium conical, smaller than the notopodium. Neurochaetae: unit 1, 2 superior spinigers, blades straight and long, 12 – 13 times longer than wide (Fig. 18 H). Unit 2, 8 falcigers, blades straight and short, 2 – 3 times longer as wide (Fig. 18 I – J). Unit 3, 6 falcigers, blades straight and short, 2 – 3 times longer than wide (Fig. 18 K – L). Unit 4, 2 falcigers, blades straight and medium-sized, 4 – 5 times longer than wide (Fig. 18 M). Blades bidentate, bended distally. Pygidium conical, with two anal cirri (Fig. 18 N). Oocytes not seen. Habitat. Subtidal. The specimen examined was collected as epibiont of bivalves.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047143EF1FD7D3FF3D22669647.taxon	distribution	Distribution. Only known from Acapulco, Guerrero (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047143EF1FD7D3FF3D22669647.taxon	discussion	Remarks. B. nenoae n. sp. resembles B. purpurea n. comb. in having slender main paleae and broad median paleae, but they can be differentiated using the form of main paleae and the features present in the subunit 1 paleae (see B. purpurea n. comb. remarks). Moreover, specimens of B. nenoae n. sp. can be easily recognized by possessing the proximal-most median palea drop-like shape.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047143EF1FD7D3FF3D22669647.taxon	etymology	Etymology. The species is named after the author’s sister, Jaemy Cruz-Gómez, aka “ Neno ”, in recognition of her support and company during our childhood and even now regardless of the distance. The epithet is a noun in the genitive case (ICZN 1999, Art. 31.1.2).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047144EF19D7D3FC2022659186.taxon	description	Figs 20, 25, 26	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047144EF19D7D3FC2022659186.taxon	materials_examined	Type locality: Rosario Beach, Coiba Island, Panamá, on dead coral at 2.5 m (Aguado et al. 2003). Material examined. Nine specimens. Baja California Sur: ECOSUR- 2991, El Caimancito Beach, February 29, 2004; ECOSUR- 2981, La Paz Bay, 1 m, March 02, 2004. Sinaloa: UANL- 0046, 2 spec. Mazatlán, July 18, 1985, coll. SSV. Jalisco: ECOSUR-XXX Melaque, December 01, 2004. Michoacán: UMAR-Poly 938, 2 spec. Caleta de Campos, pier piles, 3 m, October 7, 1994, coll. RBZ & SGM. Guerrero: ECOSUR- 3001, Los Cantiles, 5 m, May 26, 2000; ECOSUR-P 2985, La Quebrada, on Pinctada sp., 2 m, May 25, 2000; ECOSUR-PXXX, La Quebrada, on Pinctada sp., 6 m, May 25, 2002, coll. AM; UMAR-Poly 939, 2 spec. Coral Beach, 17 º 40 ’ 36 ” N, 101 º 39 ’ 22 ” O, Ixtapa, on dead coral, 1. 5 m, September 19, 2007, coll. SGM et al. Oaxaca: ECOSUR- 2993, La Entrega, on stromatolite, 3 m, May 23, 2000; UMAR-Poly 940, Estacahuite Bay, 15 º 40´05 ” N, 96 º 28´56 ” W, on dead coral, June 3, 2007, coll. JJG & PHM; UMAR-Poly 941, Corralero Lagoon, 16 º 14´11 ” N, 98 º 11´36 ” W, on sand, June 18, 2009, coll. JMM & JRC.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047144EF19D7D3FC2022659186.taxon	description	Description. Based on the best-preserved specimen (ECOSUR- 2991): complete with 78 segments. TL = 10.2 mm, TW = 1.5 mm. Body long, broad, tapered posteriorly (Fig. 20 A). Body whitish to pale yellow. Paleae fan bright yellow, slightly imbricated dorsally. Prostomium visible between the first two segments. Lateral antennae short, inserted on the antero-ventral prostomial margin, median antenna slightly shorter than lateral ones, inserted in front of the first pair of eyes. Eyes red-violet, two pairs, first pair larger. Nuchal organ, small, not covering the prostomium (Fig. 20 B). Palps long, cylindrical, visible in dorsal view. Mouth fold large, placed between segment 3 and 4. Pharynx eversible, not exposed, stylets thick. Parapodium from segment 35, notochaetae in three main groups (Fig. 20 E). Notochaetae: lateral group inserted below notaciculum, 2 – 6 paleae, narrow and asymmetrical, with 2 – 3 (4) internal ribs and 1 raised rib (Fig. 20 G). Main group, 10 – 14 paleae; lateral-most paleae, slender and asymmetrical, with (4) 5 – 6 internal ribs and 0 – 1 raised rib (Fig. 20 H); mid-most paleae, asymmetrical or symmetrical, with (5) 6 – 7 (8) internal ribs (Fig. 20 I); midlinemost paleae, broad and asymmetrical, with 6 – 7 internal ribs (Fig. 20 J). Median group, 2 – 4 paleae, shorter, narrow and asymmetrical, with 3 – 4 internal ribs and 1 raised rib (Fig. 20 K). All paleal groups with margins markedly serrated, including the small dorsal spines (Fig. 20 F); paleal dorsal surface ornamented with tiny tubercles. Neuropodium conical, longer than notopodium. Neurochaetae: unit 1, 1 – 2 falcigers, blades straight and long, 14 – 15 times longer than wide (Fig. 20 L). Unit 2, 7 – 8 falcigers, blades straight and medium-sized, 6 – 7 times longer than wide (Fig. 20 M). Unit 3, 5 – 6 falcigers, blades straight and medium-sized, 5 – 7 times longer than wide (Fig. 20 N). Unit 4, 4 – 5 falcigers, blades straight and short, 4 – 5 times longer than wide. Pygidium rounded with two anal cirri (Fig. 20 C). Oocyte size: 25.6 – 30 µm (n = 4) (Fig. 20 D). Habitat. Intertidal to subtidal (1 – 11.7 m). Specimens of this species were collected in rocks, dead coral, pier piles, and as epibionts on sponge, mollusk, and sabellariids tubes. The species has been collected on living and dead coral, coarse sand and pier piles (Aguado et al. 2003; Cruz-Gómez & Bastida-Zavala 2018).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047144EF19D7D3FC2022659186.taxon	distribution	Distribution. From La Paz Bay, Baja California Sur to Uvas Island, Panama (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047144EF19D7D3FC2022659186.taxon	discussion	Remarks. The specimens of C. elegantoides revised herein agree with the description by Aguado et al. (2003). Originally, Aguado et al. (2003) stated that specimens of C. elegantoides lack interramal gland, and this feature was used to differentiate it from other related species such as C. elegans Bush in Verrill, 1910. However, the morphological significance should be reevaluated in order to confirm if the feature is useful to separate species. According to Watson (Pers. Comm. 2020), the development of the interramal gland, along with the cirrophoral gland, depends on the maturity of the specimen examined.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047145EF19D7D3FD5020D094FD.taxon	description	Figs 21, 26	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047145EF19D7D3FD5020D094FD.taxon	materials_examined	Type locality: Bajo Mali Rock (7 º 39´00 ” N, 81 º 41´40 ” W), Coiba Island, Panamá, on coarse sand at 0 – 4 m (Aguado et al. 2003). Material exmined. Baja California Sur: UMAR-Poly 942, La Paz Bay, coll. RBZ, no further data.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047145EF19D7D3FD5020D094FD.taxon	description	Description. Based on the only specimen found: complete with 32 segments. TL = 2.7 mm, TW = 0.4 mm. Body long, broad, tapered posteriorly (Fig. 21 A). Body pale orange. Paleae fan bright yellow, slightly imbricated dorsally. Prostomium visible between the first two segments. Lateral antennae short, inserted on the antero-ventral prostomial margin, median antenna short, half of lateral ones, inserted in front of the first pair of eyes. Eyes red-violet, two pairs. Nuchal organ, small, not covering the prostomium (Fig. 21 B). Palps long, cylindrical, visible in dorsal view. Mouth fold large, placed between segment 3 and 4. Pharynx eversible, not exposed, stylets thick. Parapodium from segment 27, notochaetae in three main groups (Fig. 21 D). Notochaetae: lateral group inserted below notaciculum, 3 – 4 paleae, narrow and asymmetrical, with 1 – 2 internal ribs (Fig. 21 E); subunit 1, 1 paleae, broader and asymmetrical, with 5 internal ribs (Fig. 21 F). Main group, 20 – 24 paleae; lateral-most paleae, asymmetrical, with (8) 10 – 13; mid-most paleae, symmetrical, with 10 – 11 internal ribs and 0 – 1 raised ribs; midline-most paleae, asymmetrical, with (8) 10 – 12 (Fig. 21 G). Median group, 3 – 4 paleae, shorter, curved and asymmetrical, with 4 – 8 internal ribs and 0 – 1 raised rib (Fig. 21 H). All paleal groups with margins finely serrated, dorsal paleal surface ornamented with raised tubercles. Neuropodium conical, longer than notopodium. Neurochaetae: unit 1, 2 – 5 falcigers, blades straight and long, 11 – 12 times longer than wide (Fig. 21 I). Unit 2, 6 – 8 falcigers, blades straight and medium-sized, 3 – 4 times longer than wide. Unit 3, 5 – 6 falcigers, blades straight and medium-sized, 6 – 7 times longer than wide (Fig. 21 K). Unit 4, 2 – 3 falcigers, blades straight and short, 2 – 3 times longer than wide (Fig. 21 L). Pygidium rounded with two anal cirri (Fig. 21 C). Oocytes not seen. Habitat. Intertidal to subtidal (0 – 10 m). The sole specimen examined was possibly obtained from dead coral (Bastida-Zavala Pers. Comm. 2017). Previously, specimens of C. maculatum were collected in rocks, dead coral, and coarse sand (Aguado et al. 2003; Cruz-Gómez & Bastida-Zavala 2018).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047145EF19D7D3FD5020D094FD.taxon	distribution	Distribution. From La Paz Bay, Baja California Sur to Roca Bajo Mali, Panamá (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C38047145EF19D7D3FD5020D094FD.taxon	discussion	Remarks. Recently, the suffix of the epithet was modified by Read (2018) to match with the neuter gender of the genus (ICZN 1999, Art. 31.2). The species is easily distinguishable among Chrysopetalum due to broad main paleae.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF16D7D3FF3D24AF95AB.taxon	description	Figs 22, 26	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF16D7D3FF3D24AF95AB.taxon	materials_examined	Type locality: San Pedro Harbor, California, U. S. A., at 4.5 m (Johnson 1897). Material examined. twenty-seven specimens. Baja California Sur: ECOSUR- 2116, Terminal Lagoon, Bahía Concepción, on coarse sand, May 6, 1981, coll. HL; ECOSUR- 2111, Morro Point, June 23, 1982, coll. SSV; UANL 0049, Requesón Beach, Bahía Concepción, July 19, 1985, coll. ALG; UANL 0047, 2 spec. Bahía Concepción, July 20, 1985, coll. ALG; UMAR-Poly 943, 4 spec. Bahía Concepción, May 15, 1988, coll. RBZ. Jalisco: ECO- SUR- 2983, 2 spec. San Patricio Melaque, on rocks with sand, 1 m, December 1, 2004, coll. BY & PSS. Guerrero: UMAR-Poly 944, 14 spec. Coral Beach, 17 º 40´36 ” N, 101 º 39´22 ” W, Ixtapa, on dead coral, 1. 5 m, September 19, 2007, coll. SGM et al.; UMAR-Poly 945, Azul Beach, Coyula, September 20, 2007, coll. SGM et al. Oaxaca: ECOSUR-PXXX, La Entrega Beach, Huatulco, on stromatolite, 3 m, May 23, 2000, coll. SSV et al.; UMAR-Poly 946, Panteón Beach, 15 º 39´50 ” N, 96 º 29´43 ” W, on sediment, 3 m, May 21, 2008.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF16D7D3FF3D24AF95AB.taxon	description	Description. Based on the best-preserved specimen (ECOSUR- 2111): complete with 44 segments. TL = 5.6 mm, TW = 1.3 mm. Body long, broad, tapered posteriorly (Fig. 22 A). Body pale whitish to pale yellow. Paleae fan bright yellow, slightly imbricated dorsally. Prostomium visible between the first two segments. Lateral antennae short, inserted on the antero-ventral prostomial margin, median antenna shorter than lateral ones, inserted between the first pair of eyes. Eyes red-violet, two pairs. Nuchal organ, small, not covering the prostomium (Fig. 20 B). Palps long, cylindrical, visible in dorsal view. Mouth fold large, placed between segment 3 and 4. Pharynx eversible, not exposed, stylets thick. Parapodium from segment 30, notochaetae in three main groups (Fig. 22 E). Notochaetae: lateral group inserted below notaciculum, 2 – 3 paleae, narrow and asymmetrical, with 2 – 3 internal ribs and 0 – 1 raised rib (Fig. 22 F); subunit 1, 1 palea, broad and asymmetrical, with 4 – 5 internal ribs (Fig. 22 G). Main group, 15 – 19 paleae; lateral-most paleae, broad and asymmetrical, with 5 internal ribs; mid-most paleae, symmetrical with 5 – 6 internal ribs; midlinemost paleae broad, asymmetrical, with 6 internal ribs (Fig. 22 H). Median group, 3 – 4 paleae, shorter, slender and asymmetrical, with 4 – 5 (6) internal ribs and 0 – 1 raised rib (Fig. 22 I – K). All paleal groups with margins finely serrated, and dorsal paleal surface ornamented with tiny tubercles. Neuropodium conical, longer than notopodium. Neurochaetae: unit 1, 1 – 2 falcigers, blades straight and long, 7 – 8 times longer than wide (Fig. 22 L). Unit 2, 4 – 5 falcigers, blades straight and medium-sized, 6 – 7 times longer than wide (Fig. 22 M). Unit 3, 5 – 7 falcigers, blades straight and medium-sized, 6 – 7 times longer than wide (Fig. 22 N). Unit 4, 3 – 4 falcigers, blades straight and medium-sized, 5 – 6 times longer than wide (Fig. 22 O). Pygidium rounded with two anal cirri (Fig. 22 C). Oocyte size: 58.4 – 83.3 µm (n = 5) (Fig. 22 D). Habitat. Intertidal to subtidal (0.5 – 9.7 m). Specimens of C. occidentale were collected on sediment, rock, dead coral, and as epibiont on stromatolite. This species has been recorded as epibiont on bivalve, P. damicornis (Linnaeus, 1758), bryozoa, hydrozoa, tunicate, sponges, chaetopterids tubes, and as a member of the fouling community (Rioja 1941; Hartman 1961; Cruz-Gómez & Bastida-Zavala 2018).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF16D7D3FF3D24AF95AB.taxon	distribution	Distribution. From San Pedro Harbor, California to Galápagos Islands (Johnson 1897; Monro 1933; Rioja 1941; Hartman 1961; Perkins 1985; Gómez et al. 1997; Dean et al. 2012; Cruz-Gómez & Bastida-Zavala 2018) (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF16D7D3FF3D24AF95AB.taxon	discussion	Remarks. Specimens revised herein agree with the description made by Perkins (1985), Aguado et al. (2003) and Cruz-Gómez & Bastida-Zavala (2018). Intraspecific differences were noted on northern specimens from Jalisco; these have large cirrophoral glands, which differs from the southern specimens from Oaxaca, whose glands are smaller. This condition is related to the maturity of the specimens (CW Pers. Comm. 2020).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF17D7D3F97B25769496.taxon	description	Figs 23, 25, 26 urn: lsid: zoobank. org: act: F 68660 D 1 - DFF 8 - 4 DDF- 86 FB- 296 B 0 C 1 A 532 C	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF17D7D3F97B25769496.taxon	materials_examined	Type locality: La Manzanilla, Nayarit, México. Type material. Holotype: ECOSUR- 270, on a separated vial, La Manzanilla, Nayarit, México, northern Mexican Pacific, 2 m, November 29, 2004, coll. BY & PSS. Paratypes: ECOSUR- 271, 3 spec., same data as holotype. ECOSUR- 272, La Cruz, Nayarit, México, northern Mexican Pacific, on rock, 0.5 m, November 26, 2004, coll. BY & PSS. Other material examined. Twenty-one specimens. Baja California Sur: ECOSUR- 3069, Marina Palmira, 24 º 10.992´N, 110 º 18.185´W, La Paz Bay, 0.5 m, 1 spec. / 250 cm 2, August 15, 2011, coll. TVG & MAC. Jalisco: ECOSUR- 3210, 2 spec. Andador, San Pedro Melaque, on rocks with algae, 3 m, December 2, 2004, coll. BY & PSS; ECOSUR- 3211, 4 spec. Barra de Navidad, on rocks, 4 m, December 3, 2004, coll. BY & PSS; ECOSUR- 3067, 6 spec. Pajarera Island, on coral, 7 m, June 26, 2013, coll. BY. Michoacán: UMAR-Poly 948, Faro de Bucerías, October 4, 1994, coll. RBZ & SGM. Guerrero: UMAR-Poly 949, Manzanillo Beach, 16 º 50´31 ” N, 99 º 54´37 ” W, on sponge, 1 m, September 21, 2007, coll. SGM et al. Oaxaca: UMAR-Poly 950, UMAR-Poly 951, 3 spec., Estacahuite Bay, 15 º 40´05 ’’ N, 96 º 28´56 ’’ W, on algae and dead coral, 0.5 m, July 3, 2007; UMAR-Poly 952, 3 spec. El Maguey Beach, July 4, 2007. Grand Caribbean region: 1 spec. of Chrysopetalum elegans Quintana Roo: ECO- SUR-PXXX, Aventura Beach, Cancún, 1 m, February 19, 2001, coll. MTH.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF17D7D3F97B25769496.taxon	description	Description. Based on the holotype: complete with 53 segments. TL = 6.7 mm, AT = 1.2 mm. Body long, tapered posteriorly (Fig. 23 A). Body pale orange to brown. Paleae fan translucent to golden bright, slightly imbricated dorsally. Prostomium visible among the first five segments. Lateral antennae long, inserted on antero-ventral prostomial margin, median antenna slightly shorter than lateral ones. Eyes red-violet, two pairs. Nuchal organ large, round, partially covering prostomium (Fig. 23 B). Palps long, cylindrical, visible in dorsal view. Mouth fold wide, placed between segment 3 and 4. Pharynx eversible, not exposed, stylets slender. Parapodium from segment 27, notochaetae in three main groups (Fig. 23 E). Notochaetae: lateral group inserted below notaciculum, 4 – 5 paleae, slender and narrow, with 2 – 3 internal ribs and 0 – 1 raised rib (Fig. 23 F). Main group, 15 – 18 paleae; lateral-most, slender, curved and asymmetrical, with 5 – 6 (7) internal ribs (Fig. 23 G); midmost, broader and symmetrical, with 5 – 7 internal ribs (Fig. 23 H); midline-most, slender and asymmetrical, with 4 – 5 (6) internal ribs (Fig. 23 I). Median group, 3 – 4 paleae short, curved and asymmetrical; the distal-most with 3 internal ribs and 1 raised rib; the next proximal palea smaller with 3 internal ribs and 1 raised rib, and the proximalmost with 2 internal ribs (Fig. 23 J – K). All paleal groups with margins markedly serrated, and dorsal paleal surface ornamented with tiny tubercles. Neuropodium leaf-shaped, larger than notopodium. Neurochaetae: unit 1, 4 – 5 falcigers, blades straight and long, 7 times longer than wide (Fig. 23 L). Unit 2, 4 – 6 falcigers, blades straight and long, 4 – 5 times longer than wide (Fig. 23 M). Unit 3, 3 falcigers, blades straight and medium-sized, 5 – 6 times longer than wide (Fig. 23 N). Unit 4, 2 – 3 falcigers, blades straight and short, 4 – 5 times longer than wide (Fig. 23 O). Pygidium rounded with two anal cirri (Fig. 23 C). Oocyte size: 40.3 – 64.2 µm (n = 3) (Fig. 23 D). Habitat. Intertidal to subtidal (0.5 – 7 m). Specimens of C. mexicanum n. sp. were collected mostly on rocks and as epibiont of algae, sponges, and as members of the fouling community.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF17D7D3F97B25769496.taxon	distribution	Distribution. From La Paz Bay, Baja California Sur to La Tijera, Oaxaca (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF17D7D3F97B25769496.taxon	discussion	Remarks. Chrysopetalum mexicanum n. sp. belongs to the group of Chrysopetalum with slender paleae, such as C. elegans Bush in Verrill, 1900, C. elegantoides and C. tovarae n. sp. Specimens of C. mexicanum n. sp. possess main paleal group with two different forms of main paleae: mid-most shorter and wider, which resembles those on C. occidentale, whereas the lateral-most long and slender which, resembles those on C. elegantoides and C. tovarae n. sp. However, the differences can also be found in this group of paleae. Main paleae of C. elegantoides are broader than those in C. mexicanum n. sp. (7 times wider than long vs 9 times wider than long); regarding C. tovarae n. sp., the specimens possess main paleae thinner than those in C. mexicanum n. sp. (11 times wider than long vs 9 times wider than long). On the other hand, C. mexicanum n. sp. possesses all paleae groups present tips with an acute distal projection, while C. elegantoides and C. tovarae n. sp. present rounded tips. Finally, C. elegans has all main paleae slender and long, from the lateral-most to midline-most main paleae, whereas C. mexicanum n. sp. has lateral-most and midline-most main paleae long and slender, and the mid-most main paleae short and broad.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714AEF17D7D3F97B25769496.taxon	etymology	Etymology. The specific epithet indicates where the first specimen was collected, from the Pacific coast of México. The name includes a suffix to match the genus gender (ICZN 1999, Art. 32.2), meaning Mexican.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714EEF0DD7D3FF3D218E9056.taxon	description	Figs 24, 25, 26 LSID: urn: lsid: zoobank. org: act: CD 6 C 7 D 54 - 6701 - 48 FA- 9885 - AAABFB 63 CC 2 F	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714EEF0DD7D3FF3D218E9056.taxon	materials_examined	Type locality: La Marina, La Paz Bay, Baja California Sur, México. Type material. Holotype. ECOSUR- 273, Marina Palmira, 24 º 10.992´N, 110 º 18.185´W, La Paz Bay, pier piles, 0.5 m, 1 spec. / 250 cm 2, August 15, 2011, coll. TVG & ADL; Paratype: ECOSUR- 274, La Marina, 24 º 09.319´N, 110 º 19.630´W, La Paz Bay, pier piles, 0.5 m, 1 spec. / 250 cm 2, August 14, 2011, coll. TVG & ADL. Other material examined. One specimen. Baja California Sur: UMAR-Poly 947, La Paz Bay, on sponge Aplysina fistularis (Pallas, 1766), 5 m, November 1989, coll. MAB et al.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714EEF0DD7D3FF3D218E9056.taxon	description	Description. Based on the holotype: complete with 59 segments. TL = 9.3 mm, AT = 2 mm. Body short, tapered posteriorly (Fig. 24 A). Body pale orange to brown. Paleae fan translucent to golden bright, slightly imbricated dorsally. Prostomium visible among first five segments. Lateral antennae long, inserted on antero-ventral prostomial margin, median antenna as long as lateral ones, inserted behind the first pair of eyes. Eyes red violet, two pairs, with a secondary extra pair of eyes. Nuchal organ small, round, non-covering prostomium (Fig. 24 B). Palps short, oval, visible in dorsal view. Mouth fold small, placed between segment 4 and 5. Pharynx eversible, not exposed, stylets slender. Parapodium from segment 20, notochaetae in three main groups (Fig. 24 E). Notochaetae: lateral group inserted below notaciculum, 5 – 6 paleae, slender and narrow, with 2 internal ribs and 1 raised rib (Fig. 24 F); Main group, 11 – 16 paleae; lateral-most, slender, curved and asymmetrical, with 6 internal ribs (Fig. 24 G); mid-most, broader, slightly shorter and symmetrical, with 6 – 7 internal ribs (Fig. 24 H); midline-most, slender and asymmetrical, with 6 internal ribs (Fig. 24 I). Median group, 3 – 5 paleae, short, narrow and asymmetrical; the distal-most (usually, duplicate) with 2 – 3 internal ribs and 1 raised rib; the next proximal palea smaller with 2 – 3 internal ribs and 1 raised rib, and the proximal-most with 2 internal ribs and 1 raised rib (Fig. 24 J). All paleal group with margins markedly serrated, on dorsal paleal surface ornamented with tiny tubercles. Neuropodium leaf-shaped, larger than notopodium. Neurochaetae: unit 1, 2 – 3 falcigers, blades straight and long, 7 – 10 times longer than wide (Fig. 24 K – L). Unit 2, 3 – 4 falcigers, blades straight and medium-sized, 5 – 6 times longer than wide (Fig. 24 M). Unit 3, 6 – 7 falcigers, blades straight and medium-sized, 5 – 6 times longer than wide (Fig. 24 N). Unit 4, 2 – 3 falcigers, blades straight and short, 3 – 4 times longer than wide (Fig. 24 O). Pygidium rounded with two anal cirri (Fig. 24 C). Oocyte size: 11.5 – 21.4 µm (n = 4) (Fig. 24 D). Habitat. Intertidal to subtidal (0.5 – 5 m). Specimens of this species were collected as epibionts of A. fistularis and as members of fouling community.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714EEF0DD7D3FF3D218E9056.taxon	distribution	Distribution. Only known from La Paz Bay, Baja California Sur, Mexico (Fig. 26).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714EEF0DD7D3FF3D218E9056.taxon	discussion	Remarks. Chrysopetalum tovarae n. sp. resembles C. elegans, C. elegantoides and C. mexicanum n. sp., in having slender paleae, however, some features help to separate them from each other. Differences among these species can be summarized as follows: C. tovarae n. sp. has long, slender paleae; C. mexicanum n. sp. and C. elegantoides have long and broader paleae (see C. mexicanum n. sp. remarks), and C. elegans have longer and even more slender paleae (11 times wider than long vs 15 times wider than long). The range of internal ribs of main paleae was discarded as relevant per se, because the range overlapped among the species of Chrysopetalum with slender paleae from the TEP and the TNP. However, the consistency of the number of internal ribs can be used to identify the species. Specimens of C. elegantoides and C. mexicanum n. sp. exhibit a wide range of internal ribs, while specimens of C. tovarae n. sp. have a well delimited range of internal ribs [(4) 5 – 7 (8) vs 6 – 7]. Further, width and shape of the apex of the main paleae were evaluated and appears to be relevant. Main paleae from similar sizes specimens (~ 6 mm length) of C. elegantoides (n = 5), C. mexicanum n. sp. (n = 5) and C. tovarae n. sp. (n = 3) were revised. Differences were found in the lateral-most main palea, and midlinemost main palea; the mid-most palea did not show an evident difference among species. On the other hand, and in order to observe the paleal proportions, imaginary lines were drawn using marginal teeth as reference. The distal line (DL) was traced from the second distal-most left tooth to the right one, the medium line (ML) from the fourth distal-most left tooth to the right one, and the proximal line (PL) from the sixth distal-most left tooth to the right one; the treatment was repeated in all the evaluated main paleae (Fig. 25). Specimens of C. tovarae n. sp. share with C. elegantoides the paleal apex broad and rounded, with the internal ribs extended into the apex (Fig. 25 A – D; 25 E – H), while specimens of C. mexicanum n. sp. have the paleal apex slender and acute, with the internal ribs not extended into the apex (Fig. 25 C – D). Specimens of C. tovarae n. sp. have lateral-most main palea with the PL short, 2 1 / 2 longer than DL, and about the same length of the ML, which provides the palea with slender appearance (Fig. 25 I – J); whereas specimens of C. elegantoides and C. mexicanum n. sp. have the same type of palea with the PL wide, 2 1 / 2 as long as the DL, and longer than the ML, which provides the palea with broad appearance (Fig. 25 A – B, E – F). About the midline-most main palea, specimens of C. tovarae n. sp. have the PL long, twice as long as DL, and about the same length of ML, which provides the palea with slender appearance (Fig. 25 K – L); whereas C. elegantoides and C. mexicanum n. sp. the PL long, twice as long as DL, and slightly longer than ML, which provides the palea with broad appearance (Fig. 25 C – D, G – H). Regarding neurochaetae, specimens of C. tovarae n. sp. have the blades of unit 1 slender, slightly curved, and long, about 1 1 / 2 times longer than unit 2; while specimens of C. elegantoides and C. mexicanum have the blades of unit 1 broad, straight and long, and about the same length of unit 2. This kind of peculiar long blades has been previously seen in another species of the genus. Specimens of Chrysopetalum hernancortezae Perkins, 1985 described from Florida, have the blade from the superior spiniger (unit 1) slender, slightly curved, and long, about 2 1 / 2 times longer than unit 2, much longer than those in C. tovarae n. sp.	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
044C3804714EEF0DD7D3FF3D218E9056.taxon	etymology	Etymology. This species is named after María Ana Tovar-Hernández, in recognition of her contribution to the knowledge of polychaetes, especially on sabellids; further, and her studies on exotic marine invertebrates. Also, she kindly provided material for this study and collected this new species. The epithet is a noun in the genitive case (ICZN 1999, Art. 31.1.2).	en	Cruz-Gómez, Christopher (2021): A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific. Zootaxa 5068 (1): 1-59, DOI: https://doi.org/10.11646/zootaxa.5068.1.1
