taxonID	type	description	language	source
AB5287C1FFDFA90538B4AB4BFA06A024.taxon	description	The main distinctive characters used in the key are the shape of the parapodial lamellae, the shape of acicular lobes and the chaetae types. Although there is some doubt about the existance of Inermonephtys foretmontardoi Ravara, Cunha & Pleijel, 2010, Nephtys caeca (Fabricius, 1780), N. ciliata (Müller, 1788), N. hystricis McIntosh, 1900, N. longosetosa Örsted, 1842 and N. paradoxa Malm, 1874 in the Sea of Marmara and the Black Sea, they are included in the key. The information included in the key is based on previous works that studied type material of these species (especially Ravara et. al. 2010; Dnestrovskaya 2020). Also it is thought that the new Inermonephtys species found in this study was previously designated as I. foretmontardoi in the region.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFDEA90E38B4AB7BFC38A340.taxon	description	(Figures 2 – 4) urn: lsid: zoobank. org: act: 1 C 719 DAD-B 8 C 1 - 4 E 95 - ACE 7 - CEC 32 B 55 DF 07	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFDEA90E38B4AB7BFC38A340.taxon	materials_examined	Material examined. Holotype: ESFM-POL / 2000 - 910, Aegean Sea, 03 August 2000, Saros Bay, 40 ˚ 20 ’ 03 ” N, 26 ˚ 13 ’ 12 ” E, 94 m, muddy sand. Paratypes: ESFM-POL / 2013 - 1305, Sea of Marmara, 15 June 2013, station Y 21, 40 ° 35 ’ 14 ’’ N, 27 ° 57 ’ 16 ’’ E, 50 m, muddy sand with shell fragments; ESFM-POL / 2000 - 911, Aegean Sea, 03 August 2000, Saros Bay, 40 ˚ 20 ’ 03 ” N, 26 ˚ 13 ’ 12 ” E, 94 m, muddy sand, 3 specimens; ESFM-POL / 2000 - 916, 02 August 2000, Gökçeada, 40 ˚ 13 ’ 20 ” N, 26 ˚ 03 ’ 00 ” E, 96 m, mud, 2 specimens; ESFM-POL / 2000 - 912, 15 September 2000, Didim, 37 ˚ 23 ’ 55 ” N, 27 ˚ 06 ’ 52 ” E, 71 m, muddy sand, 6 specimens; ESFM-POL / 2000 - 917, 14 September 2000, Kuşadası Bay, 37 ˚ 55 ’ 18 ” N, 27 ˚ 07 ’ 41 ” E, 78 m, mud, 1 specimen; ESFM-POL / 2000 - 918, 29 September 2000, Güllük Bay, 37 ˚ 12 ’ 43 ” N, 27 ˚ 12 ’ 18 ” E, 85 m, mud, 1 specimen; ESFM-POL / 2000 - 915, 18 September 2000, Bodrum, 36 ˚ 59 ’ 00 ” N, 27 ˚ 05 ’ 35 ” E, 83 m, mud, 3 specimens; ESFM-POL / 2000 - 919, 18 September 2000, Gökova Bay, 36 ˚ 58 ’ 30 ” N, 27 ˚ 57 ’ 10 ” E, 109 m, muddy sand, 1 specimen; ESFM-POL / 2000 - 913, 21 September 2000, Bozburun, 36 ˚ 42 ’ 30 ” N, 28 ˚ 00 ’ 15 ” E, 57 m, muddy sand, 1 specimen; ESFM-POL / 2016 - 349, 15 August 2016, Aliağa, 38 ° 49 ’ 23.88 ” N, 26 ° 57 ’ 4.74 ” E, 21 m, mud, 1 specimen; ESFM-POL / 2000 - 914, 23 September 2000, Marmaris, 36 ˚ 44 ’ 30 ” N, 28 ˚ 26 ’ 10 ” E, 110 m, sand with mud, 1 specimen. Additional material. Levantine Sea: ESFM-POL / 2005 - 3416, 30 September 2005, Finike Bay, 36 ° 16 ’ 3.47 ” N, 30 ° 11 ’ 19.81 ” E, 100 m, mud, 1 specimen; ESFM-POL / 2005 - 3417, 30 September 2005, Finike Bay, 36 ° 16 ’ 7.88 ” N, 30 ° 12 ’ 22.66 ” E, 100 m, mud, 2 specimens.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFDEA90E38B4AB7BFC38A340.taxon	description	Description. Holotype (ESFM-POL / 2000 - 910) posteriorly incomplete, 25.7 mm long, 2.8 mm wide, with 97 chaetigers; paratypes incomplete (some pygidium-bearing posterior parts present); 25 – 55 mm long, 2.14 – 2.9 wide and 44 – 109 chaetigers. Colour in ethanol yellowish, without any pigmentation (Fig. 3 A). Prostomium subrectangular (0.6 mm long, 0.5 mm wide), flattened, reaching to chaetiger 2 (Figs. 2 A, 3 B). Anterior margin rounded, posterior margin “ V ” shaped, with a pair of conspicuous and digitiform nuchal organs (Figs. 2 A, 3 B). Eyes visible in small specimens (1 mm wide) becoming indistinct or absent in larger specimens. Antennae absent. One pair of cushionlike palps with digitiform tips (0.08 mm long) present on ventro-lateral margin of prostomium (Figs. 2 B, 3 C). Pharynx partly everted; proboscis without papillae. One pair of jaws present near pharyngeal base, light brown, spindle-shaped (length about 0.7 mm long, height 0.3 mm) (Fig. 2 C). Parapodia of first chaetiger slightly smaller than subsequent ones, directed anteriorly, parallel to prostomium. First parapodia with well developed notopodial postchaetal lamellae, conical neuropodia with protruding acicular lobe, ventral and dorsal cirri. Dorsal and ventral cirri of the first chaetiger conical, with a broad base and tapering distally, similar in size (0.2 mm) (Figs. 2 A, 3 B). Neuropodial postchaetal lamellae well developed on chaetiger 2 in largest paratype, and on chaetiger 3 or 4 in small specimens. Prechaetal lamellae well developed on neuropodia of chaetiger 4 and on notopodia of chaetiger 5 (in smallest specimens very rudimentary and could not be seen in the whole body). In anterior chaetigers (chaetiger 10), prechaetal lamellae small, broadly rounded, shorter than acicular lobe (Figs. 2 G, 4 A 1); notopodial postchaetal lamellae well developed, broadly rounded, extending well beyond acicular lobe (Figs. 2 G, 4 A 2); neuropodial postchaetal lamellae cylindrical, extending well beyond acicular lobe (Figs. 2 G, 4 A 2). In chaetiger 20, prechaetal and postchaetal lamellae somewhat similar to those on chaetiger 10 (Figs. 2 H, 4 B 1), but notopodial postchaetal lamellae becoming leaf-like with a tapered tip (Figs. 2 H, 4 B 2). In middle chaetigers (chaetiger 40), notopodial postchaetal lamellae narrower distally, tapered towards a rounded tip, neuropodial postchaetal lamellae cylindrical, extending well beyond acicular lobe (Figs. 2 I, 4 C 2); noto- and neuropodial prechaetal lamellae rounded, shorter than acicular lobes (Figs. 2 I, 4 C 1). In posterior chaetigers (chaetiger 102), notopodial postchaetal lamellae leaf-like, similar to chaetiger 20 but with more pointed tips (Figs. 2 J, 4 D 2). Neuropodial postchaetal lamellae reduced, almost not visible (Figs. 2 J, 4 D 1 – 2). Noto- and neuropodial prechaetal lamellae small, rounded, narrower than anterior and median region (Figs. 2 J, 4 D 1). Acicular lobes oblique-shaped in anterior region (Figs. 2 G, 4 A 1 – B 1), becoming conical in middle region (Figs. 2 I, 4 C 1) and acutely pointed in posterior region (Figs. 2 J, 4 D 1). Branchiae involute, long and digitiform (Figs. 2 G – J, 4 A – D), heavily ciliated when fully developed, starting from chaetiger 3 (as a small papilla) or 4, in large specimens (body width> 2 mm); from chaetiger 5 – 7 in medium size specimens (body wide 1 to 2 mm); and from chaetiger 10 – 13 in small specimens (body wide <1 mm); absent on last 3 – 4 chaetigers. The smallest complete specimen (length 0.4 mm) completely lacks branchiae. Accessory cirri (basal papillae) conspicuous, first appearing on dorsal surface of branchiae on chaetiger 4 – 5 (or after second or third chaetiger where branchiae first seen) and disappearing in posterior parapodia, after chaetigers 79 – 80. Dorsal cirri conical, longer than branchiae on first 4 – 5 anterior chaetigers; relatively robust and shorter in following parapodia, becoming slender and longer towards the posterior end (Figs. 2 G – J, 4 A – D). Ventral cirri conical in anterior and middle region, longer than neuropodial acicular lobes (Figs. 2 G – I, 4 A – C), become leaf-like in posterior parapodia, and similar size to the neuropodial lobes (Figs. 2 J, 4 D). Four types of chaetae present in parapodia; capillary chaetae, barred-like chaetae, spinulated chaetae and lyrate chaetae. Capillary chaetae only present on notopodia of first chaetiger, numbering 3 – 4. Barred chaetae with very light sandpaper-like appearance (Figs. 2 E, 3 F), thick and long, numbering 7 – 8 in first chaetiger, becoming thinner and shorter in middle parapodia, first appearing on both preacicular position of noto- and neuropodium of chaetiger 1 and disappearing in chaetiger 30 – 33. Spinulated chaetae first appearing on postacicular position of neuropodia in chaetiger 1, with one lateral row of coarsely serrated edge (Figs. 2 F, 3 D). Spinulated chaetae begin to appear on both pre- and postacicular position of noto- and neuropodia after disappearence of barred chaetae in chaetiger 30 – 33, numbering 30 – 35 in median chaetigers. Lyrate chaetae starting from chaetiger 3 or 4 in adults and on chaetiger 6 – 7 in small specimens, until the end of body, numbering 1 – 4 in each ramus, with slightly unequal branches (Figs. 2 D, 3 E). Aciculae reddish-brown, with strong longitudinal stripes, blunt tips in anterior and middle parapodia, becoming clearly curved in posterior parapodia; numbering 3 – 4 per ramus in first 7 – 10 anterior parapodia, 2 between parapodia 10 and 30 – 33 in adults, and 1 in posterior chaetigers; usually, notopodia carrying one more acicula than neuropodia in anterior chaetigers, and number of aciculae changing according to body size (1 in juveniles, up to 4 in adults). Pygidium rounded with one anal cirrus placed dorsally. Reproduction. One of the paratypes had eggs. Eggs appear from median chaetigers to posterior, in the coelomic cavity. The diameter of eggs varied between 100 and 120 μm. Eggs are light yellowish in colour and the specimens did not have any morphological modification on the body.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFDEA90E38B4AB7BFC38A340.taxon	discussion	Remarks. The genus Inermonephtys includes ten valid species: I. aramco Ravara & Carvalho, 2017, I. brasiliensis Martin, Gil & Da Cunha Lana, 2009, I. foretmontardoi Ravara, Cunha & Pleijel, 2010, I. gallardi Fauchald, 1968, I. inermis (Ehlers, 1887), I. japonica Imajima & Takeda, 1985, I. palpata Paxton, 1974, I. patongi Nateewathana & Hylleberg, 1986, I. soldius Franco & Rizzo, 2016 and I. tetrophthalmus Rainer & Kaly, 1988. Inermonephtys turcica n. sp. differs from the other Inermonephtys (except I. foretmontardoi) species in having long and digitiform neuropodial postchaetal lamellae on the anterior and middle chaetigers. Inermonephtys turcica n. sp. closely resembles I. foretmontardoi and I. inermis. This new species differs from I. inermis in having well developed neuropodial postchaetal lamellae in the anterior and middle regions, which extend well beyond the acicular lobes (rudimentary throughout the body in I. inermis) and differs from I. foretmontardoi in having barred chaetae in the preacicular area of the noto- and neuropodia, shape of palps (digitiform process with cushion-like base in I. turcica n. sp., ovoid, very small in I. foretmontardoi) and the first presence of branchiae (from chaetiger 4 in I. foretmontardoi; from chaetiger 3 to 13 in I. turcica n. sp.). In addition, the neuropodial postchaetal lamellae on the posterior chaetigers are greatly reduced and smaller than acicular lobes in I. turcica n. sp., a character that has not been mentioned in the original description of I. foretmontardoi (holotype incomplete) by Ravara et al. (2010). Another close species, I. aramco from the southern region of the Red Sea, differs from I. turcica n. sp. by the presence of branchiae from chaetiger 15 or 16 (3 – 13 in I. turcica n. sp.), and the rudimentary neuropodial postchaetal lamellae (well developed in I. turcica n. sp.). In addition, Ravara & Carvalho (2017) described Inermonephtys aff. inermis from the Red Sea based on a single specimen that has mixed characteristics of I. foretmontardoi and I. inermis. This species differs from I. turcica n. sp. by having rounded postchaetal lamellae slightly shorter than the acicular lobe (well developed and longer than acicular lobes in anterior and median chaetigers of I. turcica n. sp.) and spinose preacicular chaetae (preacicular chaetae are barred in anterior and median chaetigers, spinulated in posterior chaetigers in I. turcica n. sp.). The lack of barred chaetae in the posterior chaetigers in I. turcica n. sp. was also mentioned for I. soldius described from the coast of Brazil. However, these two species differ from each other by a set of morphological characters: 1) neuropodial postchaetal lamellae are rounded in I. soldius. vs. long and digitiform in I. turcica n. sp., 2) branchiae start at chaetiger 5 in I. soldius vs. between chaetigers 3 and 13 in I. turcica n. sp., 3) parapodia bear 1 or 2 aciculae in I. soldius vs. bear up to 4 aciculae in anterior parapodia in I. turcica n. sp. Since the majority of the individuals of Inermonephtys turcica n. sp. were incomplete, except for the smallest specimens, it was not possible to compare biometric features of the species such as the body length, the number of chaetigers and the number of branchiae-bearing chaetigers. However, the width of the chaetiger 15 was used to designate three size groups within I. turcica n. sp.: adult (body width> 2 mm), young (between 2 mm and 1 mm) and juveniles (body width <1 mm). Some characters significantly changed according to the groups. For example, branchiae first appeared on chaetiger 10 or more posteriorly in the juvenile specimens, while they appeared on chaetiger 5 – 7 in the young specimens and on chaetiger 3 or 4 in the adult specimens. Besides that, the basal papilla on the branchiae was absent in juveniles, while it was very small in the young specimens and very prominent in the adult specimens. The pre- and postchaetal lamellae are rudimentary in the juveniles. A pair of eyes on the prostomium are distinct in the juveniles, whereas they absent or indistinct in the adult specimens.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFDEA90E38B4AB7BFC38A340.taxon	distribution	Distribution. Sea of Marmara, Aegean Sea, Levantine Sea Habitat. This species was predominantly found in muddy sandy biotopes between 21 and 109 m depths.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFDEA90E38B4AB7BFC38A340.taxon	etymology	Etymology. This species name refers to the type locality, Turkey.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD5A90A38B4ABF6FB75A27F.taxon	description	(Figure 5)	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD5A90A38B4ABF6FB75A27F.taxon	materials_examined	Material examined. Sea of Marmara: ESFM-POL / 2013 - 1306, 06 June 2013, station Y 1, 40 ° 00 ’ 32 ’’ N, 26 ° 13 ’ 04 ’’ E, 25 m, mud, 1 specimen; Black Sea: ESFM-POL / 2014 - 621, 12 July 2014, station TRK 1, 41 ° 55 ’ 34 ” N, 28 ° 12 ’ 27 ” E, 21 m, coarse sand with shell fragments, 15 specimens; ESFM-POL / 2014 - 622, 12 July 2014, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 27 m, mud with shell fragments, 2 specimens; ESFM-POL / 2014 - 620, 13 July 2014, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 21 m, mud with shell fragments, 26 specimens; ESFM-POL / 2014 - 623, 15 July 2014, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 25 m, mud with shell fragments, 29 specimens; ESFM- POL / 2014 - 624, 15 July 2014, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 21 m, mud with shell fragments, 9 specimens; ESFM-POL / 2014 - 625, 16 July 2014, station TRK 28, 42 ° 6 ’ 20 ” N, 35 ° 15 ’ 0 ” E, 21 m, coarse sand with shell fragments, 142 specimens; ESFM-POL / 2014 - 626, 16 July 2014, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 55 m, mud with phytodetritic material, 5 specimens; ESFM-POL / 2014 - 627, 17 July 2014, station TRK 34 Y, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 21 m, mud with phytodetritic material, 2 specimens; ESFM-POL / 2014 - 628, 17 July 2014, station TRK 37, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 10 m, mud with shell fragments, 1 specimen; ESFM-POL / 2014 - 629, 16 July 2014, station TRK 43, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 8 m, mud with phytodetritic material, 5 specimens; ESFM-POL / 2014 - 630, 18 July 2014, station TRK 46, 41 ° 2 ’ 43 ” N, 38 ° 3 ’ 20 ” E, 21 m, mud with shell fragments, 64 specimens; ESFM-POL / 2014 - 631, 19 July 2014, station TRK 53, 41 ° 0 ’ 54 ” N, 38 ° 27 ’ 20 ” E, 52 m, mud with phytodetritic material, 5 specimens; ESFM-POL / 2014 - 632, 19 July 2014, station TRK 55, 41 ° 1 ’ 45 ” N, 39 ° 54 ’ 15 ” E, 21 m, mud with shell fragments, 23 specimens; ESFM-POL / 2014 - 633, 20 July 2014, station TRK 61, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 20 m, mud and shell fragments with phytodetritic material, 97 specimens; ESFM-POL / 2015 - 272, 02 July 2015, station TRK 1, 41 ° 55 ’ 34 ” N, 28 ° 12 ’ 27 ” E, 21 m, shell fragments with fine sand, 116 specimens; ESFM- POL / 2015 - 273, 03 July 2015, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 21 m, shell fragments with fine sand, 4 specimens; ESFM-POL / 2015 - 274, 03 July 2015, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 20 m, shell fragments with fine sand, 9 specimens; ESFM-POL / 2015 - 271, 04 July 2015, TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 13 m, shell fragments with phytodetritic material, 4 specimens; ESFM-POL / 2015 - 275, 04 July 2015, station TRK 13, 18 m, fine sand with shell fragments and detritic material, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 4 specimens; ESFM-POL / 2015 - 276, 04 July 2015, station TRK 13 A, 41 ° 35 ’ 23.22 ” N, 32 ° 2 ’ 4.73 ” E, 17 m, shell fragments with fine sand, 5 specimens; ESFM-POL / 2015 - 277, 05 July 2015, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 40 m, clay with shell and detritic fragments, 14 specimens; ESFM-POL / 2015 - 278, 05 July 2015, TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 21 m, shell fragments and detritic material, 21 specimens; ESFM-POL / 2015 - 279, 06 July 2015, station TRK 28, 42 ° 6 ’ 20 ” N, 35 ° 15 ’ 0 ” E, 17 m, shell fragments with fine sand detritic material, 94 specimens; ESFM-POL / 2015 - 280, 07 July 2015, TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 70 m, mud with clay and detritic material, 7 specimens; ESFM- POL / 2015 - 281, 08 July 2015, station TRK 34 Y, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 20 m, mud with fine sand and detritic material, 21 specimens; ESFM-POL / 2015 - 282, 08 July 2015, station TRK 37, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 9 m, mud with fine sand and shell fragments, 7 specimens; ESFM-POL / 2015 - 283, 09 July 2015, station TRK 46, 41 ° 2 ’ 43 ” N, 38 ° 3 ’ 20 ” E, 22 m, coarse and fine sand with shell fragments, 202 specimens; ESFM-POL / 2015 - 285, 11 July 2015, station TRK 55, 41 ° 1 ’ 45 ” N, 39 ° 54 ’ 15 ” E, 35 m, shell fragments with detritic material, 13 specimens; ESFM- POL / 2016 - 214, 24 July 2016, station TRK 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 12 m, mud with shell fragments, 64 specimens; ESFM-POL / 2016 - 215, 23 July 2016, staiton TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 23 m, fine sand with shell fragments, 7 specimens; ESFM-POL / 2016 - 216, 24 July 2016, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 20 m, shell fragments with phytodetritic material, 45 specimens; ESFM-POL / 2016 - 213, 24 July 2016, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 12 m, mud with shell fragments, 29 specimens; ESFM-POL / 2016 - 217, 26 July 2016, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 19 m, fine sand with shell fragments, 46 specimens; ESFM-POL / 2016 - 218, 26 July 2016, station TRK 16, 41 ° 43 ’ 10 ” N, 32 ° 4 ’ 60 ” E, 20 m, mud with phytodetritic material, 13 specimens; ESFM-POL / 2016 - 247, 25 July 2016, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 45 m, mud with shell fragments, 12 specimens; ESFM-POL / 2016 - 219, 25 July 2016, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 22 m, shell fragments with phytodetritic material, 57 specimens; ESFM-POL / 2016 - 220, 26 July 2016, station TRK 25, 19.5 m, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, sand with shell fragments, 9 specimens; ESFM-POL / 2016 - 221, 27 July 2016, station TRK 28, 42 ° 6 ’ 20 ” N, 35 ° 15 ’ 0 ” E, 18.8 m, mud with phytodetritic material, 78 specimens; ESFM-POL / 2016 - 222, 27 July 2016, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 60 m, mud with shell fragments, 17 specimens; ESFM- POL / 2016 - 223, 27 July 2016, station TRK 34 Y, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 21 m, shell fragments with phytodetritic material, 34 specimens; ESFM-POL / 2016 - 224, station TRK 37, 28 July 2016, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 10.9 m, shell fragments with phytodetritic material, 12 specimens; ESFM-POL / 2016 - 225, 24 July 2016, station TRK 43, 41 ° 4 ’ 2 ” N, 38 ° 2 ’ 49 ” E, 11 m, mud with phytodetritic material, 57 specimens; ESFM-POL / 2016 - 226, 28 July 2016, station TRK 44, 41 ° 2 ’ 43 ” N, 38 ° 3 ’ 20 ” E, 51 m, shell fragments with phytodetritic material, 22 specimens; ESFM- POL / 2016 - 227, 29 July 2016, station TRK 46, 41 ° 0 ’ 54 ” N, 38 ° 27 ’ 20 ” E, 32 m, mud with phytodetritic material, 38 specimens; ESFM-POL / 2016 - 228, 31 July 2016, station TRK 55, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 26 m, shell fragments with phytodetritic material, 16 specimens; ESFM-POL / 2017 - 175, 22 July 2017, station TRK 1, 41 ° 55 ’ 34 ” N, 28 ° 12 ’ 27 ” E, 23 m, shell fragments with phytodetritic material, 60 specimens; ESFM-POL / 2017 - 176, 23 July 2017, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 22.5 m, fine sand with shell fragments, 4 specimens; ESFM-POL / 2017 - 177, 24 July 2017, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 20 m, shell fragments with phytodetritic material, 4 specimens; ESFM-POL / 2017 - 174, 24 July 2017, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 14 m, mud with shell fragments, 52 specimens; ESFM-POL / 2017 - 178, 26 July 2016 station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 19 m, fine sand with shell fragments, 32 specimens; ESFM-POL / 2017 - 179, 26 July 2017, station TRK 17, 41 ° 43 ’ 10 ” N, 32 ° 4 ’ 60 ” E, 19 m, mud with phytodetritic material, 13 specimens; ESFM-POL / 2017 - 180, 26 July 2017, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 43 m, mud and shell fragments with phytodetritic material, 98 specimens; ESFM- POL / 2017 - 181, 27 July 2017, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 27 m, shell fragments with phytodetritic material, 147 specimens; ESFM-POL / 2017 - 182, 27 July 2017, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 19 m, mud with shell fragments, 36 specimens; ESFM-POL / 2017 - 183, 29 July 2017, station TRK 28, 42 ° 6 ’ 20 ” N, 35 ° 15 ’ 0 ” E, 25 m, sand with shell fragments, 99 specimens; ESFM-POL / 2017 - 184, 30 July 2017, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 72 m, mud with phytodetritic material, 6 specimens; ESFM-POL / 2017 - 185, 30 July 2017, TRK 35, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 51 m, mud with shell fragments, 32 specimens; ESFM-POL / 2017 - 186, 30 July 2017, station TRK 34 Y, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 20 m, mud with phytodetritic material, 60 specimens; ESFM- POL / 2017 - 187, 31 July 2017, station TRK 37, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 8 m, shell fragments with phytodetritic material, 33 specimens; ESFM-POL / 2017 - 188, 31 July 2017, station TRK 44, 41 ° 4 ’ 2 ” N, 38 ° 2 ’ 49 ” E, 48 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2017 - 189, 01 August 2017, station TRK 46, 41 ° 0 ’ 54 ” N, 38 ° 27 ’ 20 ” E, 28 m, shell fragments with phytodetritic material, 61 specimens; ESFM-POL / 2017 - 190, 02 August 2017, station TRK 55, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 17 m, mud with shell fragments, 113 specimens; ESFM- POL / 2017 - 203, 14 August 2017, station BK 1, 40 ° 22 ’ 12.72 ” N, 27 ° 57 ’ 42.48 ” E, 33 m, mud with shell fragments, 3 specimens; ESFM-POL / 2018 - 127, 20 July 2018, station TRK 1, 41 ° 55 ’ 34 ” N, 28 ° 12 ’ 27 ” E, 20 m, sand with shell fragments, 12 specimens; ESFM-POL / 2018 - 128, 21 July 2018, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 22 m, fine sand, 51 specimens; ESFM-POL / 2018 - 129, 22 July 2018, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 21 m, fine sand, 16 specimens; ESFM-POL / 2018 - 126, 22 July 2018, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 14 m, fine sand with shell fragments, 23 specimens; ESFM-POL / 2018 - 130, 23 July 2018, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 20 m, mud with sand and detritic material, 34 specimens; ESFM-POL / 2018 - 131, 24 July 2018, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 24 m, mud with shell fragments, 98 specimens; ESFM-POL / 2018 - 132, 25 July 2018, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 25 m, mud with shell fragments and detritic material, 145 specimens; ESFM-POL / 2018 - 133, 26 July 2018, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 20 m, sand, 3 specimens; ESFM- POL / 2018 - 134, 26 July 2018, station TRK 28, 42 ° 6 ’ 20 ” N, 35 ° 15 ’ 0 ” E, 22 m, coarse sand with shell fragments, 42 specimens; ESFM-POL / 2018 - 135, 27 July 2018, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 24 m, mud with phytodetritic material, 50 specimens; ESFM-POL / 2018 - 136, 28 July 2018, station TRK 34 Y, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 48 m, mud, 54 specimens; ESFM-POL / 2018 - 137, 28 July 2018, station TRK 37, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 8.5 m, sand, 4 specimens; ESFM-POL / 2018 - 138, 29 July 2018, station TRK 43, 41 ° 2 ’ 43 ” N, 38 ° 3 ’ 20 ” E, 48 m, mude with phytodetritic material, 33 specimens; ESFM-POL / 2018 - 139, 29 July 2018, station TRK 44, 41 ° 4 ’ 2 ” N, 38 ° 2 ’ 49 ” E, 11.6 m, sand, 33 specimens; ESFM-POL / 2018 - 140, 29 July 2018, station TRK 46, 41 ° 0 ’ 54 ” N, 38 ° 27 ’ 20 ” E, 20 m, mud with phytodetritic material, 189 specimens; ESFM-POL / 2018 - 141, 31 July 2018, station TRK 55, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 25 m, sand, 10 specimens; ESFM-POL / 2018 - 142, 01 August 2018, station TRK 61, 41 ° 46 ’ 0 ” N, 41 ° 31 ’ 0 ” E, 45 m, mud with phytodetritic material, 5 specimens; ESFM-POL / 2019 - 31, 04 July 2019, station TRK 1, 41 ° 55 ’ 34 ” N, 28 ° 12 ’ 27 ” E, 20 m, sand with shell fragments, 61 specimens; ESFM-POL / 2019 - 32, 05 July 2019, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 22 m, mud, 12 specimens; ESFM-POL / 2019 - 33, 06 July 2019, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 21 m, mud, 30 specimens; ESFM-POL / 2019 - 34, 07 July 2019, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 14 m, fine sand with shell fragments, 16 specimens; ESFM-POL / 2019 - 35, 07 July 2019, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 20 m, sand with detritic material, 30 species; ESFM-POL / 2019 - 36, 08 July 2019, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 24 m, mud with shell fragments, 67 species; ESFM- POL / 2019 - 56, 09 July 2019, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 25 m, mud with shell fragments and detritic material, 79 specimens; ESFM-POL / 2019 - 37, 09 July 2019, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 20 m, mud, 20 specimens; ESFM-POL / 2019 - 38, 10 July 2019, station TRK 28, 42 ° 6 ’ 20 ” N, 35 ° 15 ’ 0 ” E, 22 m, coarse sand with shell fragments, 235 specimens; ESFM-POL / 2019 - 39, 10 July 2019, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 24 m, mud, 64 specimens; ESFM-POL / 2019 - 40, 12 July 2019, station TRK 34 Y, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 20 m, mud with phytodetritic material, 31 specimens; ESFM-POL / 2019 - 41, 13 July 2019, station TRK 37, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 8.5 m, mud, 23 specimens; ESFM-POL / 2019 - 42, 14 July 2019, station TRK 43, 41 ° 0 ’ 14.47 ” N, 37 ° 53 ’ 36.96 ” E, 11.6 m, sand with shell fragments, 45 specimens; ESFM-POL / 2019 - 43, 14 July 2019, station TRK 44, 41 ° 2 ’ 43 ” N, 38 ° 3 ’ 20 ” E, 48 m, clay with phytodetritic material, 60 species; ESFM-POL / 2019 - 44, 16 July 2019, station TRK 55, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 25 m, mud with shell fragments, 25 specimens; ESFM-POL / 2019 - 45, 16 July 2019, station TRK 61, 41 ° 46 ’ 0 ” N, 41 ° 31 ’ 0 ” E, 45 m, mud, 2 specimens.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD5A90A38B4ABF6FB75A27F.taxon	description	Description. Largest specimen complete with 37 chaetigers, 5.8 mm long and 0.5 mm wide. Prostomium subrectangular when pharynx not everted, becoming subpentagonal when pharynx everted. Anterior margin convex, posterior margin “ U ” shaped. Antennae (0.06 mm) and palps (0.05 mm) long, digitiform with swollen tips (Fig. 5 A). Palps inserted at ventro-lateral margin of prostomium. Two pairs of coalesced eyespots present between chaetiger 2 and 3. Nuchal organs conspicuous, rounded. Pharynx everted with 18 bifid terminal papillae separated with a dorsal and ventral simple papilla; subdistal region with 20 rows of 9 – 10 subterminal papillae (first 4 – 5 papillae long and conical, decrease in size towards base of pharynx), extending over 2 / 3 length of pharynx (Fig. 5 A), proximal part of pharynx smooth. Middorsal and midventral papillae absent. Jaws light brown, triangular shaped with unequal branches, situated on anterio-lateral margin of pharynx, visible through body wall, without dissection (Fig. 5 B). Parapodia of first chaetiger slightly smaller than subsequent ones, directed anteriorly, parallel to prostomium. Dorsal cirri very small, ventral cirri (0.02 mm) digitiform with swollen tips and smaller than antennae and palps. Parapodial pre- and postchaetal lamellae rudimentary along the body (Fig. 2 D). Interramal space smooth, without ciliated patches. Dorsal cirri well developed from chaetiger 2, spherical on first 13 – 20 anterior chaetigers, becoming pear-shaped (with bulbous base and tapered to tip) towards to the posterior end (Fig. 5 C). Ventral cirri subsphaerical in whole body after first chaetiger. Acicular lobes conical in anterior region, almost acutely pointed on middle and posterior chaetigers. Five types of chaetae present in parapodia; capillary chaetae, dentate chaetae, barred chaetae, spinulated chaetae and lyrate chaetae. Dentate chaetae present only in notopodia of chaetiger 1, numbering 3 – 4 (100 µm) (Fig. 5 E). Capillary chaetae present only on neuropodia of chaetiger 1, numbering 6 - 7. Barred chaetae (130 µm) placed on preacicular area of noto- and neuropodia, first appearing on chaetiger 2, present in all remaining parapodia, numbering 3 – 7 (Fig. 5 G). Finely spinulated chaetae (250 µm) placed on postacicular area of noto- and neuropodia, first appearing on chaetiger 2, present in all remaining parapodia (Fig. 5 H). Lyrate chaeta with unequal branches placed on postacicular area of noto- and neuropodia, first appearing on chaetiger 3, present in all remaining parapodia, except for the 3 – 4 chaetiger, numbering one in each ramus (Fig. 5 F). Acicula light brown with a straight tip in anterior and middle parapodia, having curved tip in posterior parapodia, numbering one in per ramus. Pygidium rounded with one digitiform anal cirrus placed dorsally, as long as last 2 – 3 chaetigers.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD5A90A38B4ABF6FB75A27F.taxon	discussion	Remarks. The Sea of Marmara and the Black Sea specimens of Micronephthys longicornis matches the original description and redescriptions.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD5A90A38B4ABF6FB75A27F.taxon	distribution	Distribution. Adriatic Sea (Augener 1932), Mediterranean Sea (Banse 1959; San Martin 1982; Laborda 2004; Ravara et al. 2010), Black Sea (Perejaslavtseva 1891; Kurt-Şahin & Çinar 2012; Çinar et al. 2014; Kuş & Kurt- Şahin 2016; Kurt-Şahin et al. 2017 a, b; Dnestrovskaya & Jirkov 2019). Habitat. It was found in muddy and sandy bottom, up to 72 m depth in the present study. It was found in soft substratum at shallower depths (3.6 – 7 m) in the Mediterranean Sea (San Martin 1982; Laborda 2004), and up to 47.4 m in the Black Sea (Kurt-Şahin et al. 2017 a, b; Dnestrovskaya & Jirkov 2019). It was also reported in beds of the brown alga Cystoseira crinita Duby, 1830 from the Sinop Peninsula (Kuş & Kurt-Şahin, 2016).	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD1A91638B4AAFAFD65A284.taxon	description	(Figure 6)	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD1A91638B4AAFAFD65A284.taxon	materials_examined	Material examined. Sea of Marmara: ESFM-POL / 2012 - 499, 02 October 2012, station K 17, 40 ° 48 ’ 58 ’’ N, 26 ° 39 ’ 37 ’’ E, 0 - 4 m, Mytilus sp., 2 specimens; ESFM-POL / 2013 - 1240, 06 June 2013, station Y 1, 40 ° 01 ’ 27 ’’ N, 26 ° 13 ’ 24 ’’ E, 10 m, mud with dark detritic material, 1 specimen; ESFM-POL / 2013 - 1242, 07 June 2013, station Y 5, 40 ° 20 ’ 55 ’’ N, 26 ° 40 ’ 38 ’’ E, 25 m, mud, 1 specimens; ESFM-POL / 2013 - 1243, 07 June 2013, station Y 6, 40 ° 26 ’ 10 ’’ N, 26 ° 41 ’ 51 ’’ E, 10 m, mud, 1 specimens; ESFM-POL / 2013 - 1246, 07 June 2013, station Y 6, 40 ° 26 ’ 03 ’’ N, 26 ° 41 ’ 59 ’’ E, 25 m, mud, 1 specimen; ESFM-POL / 2013 - 1249, 7 June 2013, station Y 8, 40 ° 25 ’ 27 ’’ N, 27 ° 03 ’ 34 ’’ E, 25 m, mud with Amphiura filiformis, 3 specimens; ESFM-POL / 2013 - 1250, 08 June 2013, station Y 9, 40 ° 26 ’ 25 ’’ N, 27 ° 11 ’ 29 ’’ E, 25 m, mud with Amphiura filiformis and shell fragments, 3 specimens; ESFM-POL / 2013 - 1252, 08 June 2013, station Y 11, 40 ° 36 ’ 12 ’’ N, 27 ° 05 ’ 20 ’’ E, 10 m, sandy mud, 12 specimens; ESFM-POL / 2013 - 1255, 08 June 2013, station Y 12, 40 ° 40 ’ 38 ’’ N, 27 ° 16 ’ 25 ’’ E, 10 m, fine sand with Spisupa sp. shell fragments, 2 specimens; ESFM- POL / 2013 - 1256, 08 June 2013, station Y 12, 40 ° 39 ’ 44 ’’ N, 27 ° 17 ’ 00 ’’ E, 25 m, mud with Amphiura filiformis, 3 specimens; ESFM-POL / 2013 - 1257, 09 June 2013, station Y 17, 40 ° 39 ’ 09 ’ N, 27 ° 41 ’ 14 ’’ E, 25 m, mud, 1 specimen; ESFM-POL / 2013 - 1258, 10 June 2013, station Y 18, 40 ° 54 ’ 28 ’’ N, 27 ° 33 ’ 24 ’’ E, 25 m, muddy sand with Lithothamnion sp., 1 specimen; ESFM-POL / 2013 - 1263, 12 June 2013, station Y 19, 40 ° 57 ’ 28 ’’ N, 27 ° 42 ’ 16 ’’ E, 50 m, sandy mud with shell fragments, 1 specimen; ESFM-POL / 2013 1266, 15 June 2013, station Y 21, 40 ° 29 ’ 54 ’’ N, 27 ° 58 ’ 28 ’’ E, 25 m, sandy mud with shell fragments, 3 specimens; ESFM-POL / 2013 - 1267, 16 June 2013, station Y 22, 40 ° 22 ’ 18 ’’ N, 28 ° 00 ’ 41 ’’ E, 10 m, sand, 3 specimens; ESFM-POL / 2013 - 1269, 16 June 2013, station Y 22, 40 ° 23 ’ 22 ’’ N, 27 ° 59 ’ 46 ’’ E, 50 m, sandy mud with shell fragments, 1 specimen; ESFM-POL / 2013 - 1270, 16 June 2013, station Y 23, 40 ° 23 ’ 55 ’’ N, 28 ° 09 ’ 49 ’’ E, 10 m, sandy mud with shell fragments, 2 specimens; ESFM-POL / 2013 - 1273, 16 June 2013, station Y 23, 40 ° 24 ’ 06 ’’ N, 28 ° 09 ’ 57 ’’ E, 25 m, sandy mud with shell fragments, 6 specimens; ESFM-POL / 2013 - 1274, 16 June 2013, station Y 25, 40 ° 24 ’ 280 ’’ N, 28 ° 20 ’ 840 ’’ E, 10 m, sandy mud with shell fragments, 1 specimen; ESFM- POL / 2013 - 1275, 16 June 2013, station Y 25, 40 ° 24 ’ 48 ’’ N, 28 ° 20 ’ 41 ’’ E, 25 m, sandy mud with shell fragments, 2 specimens; ESFM-POL / 2013 - 1277, 16 June 2013, station Y 26, 40 ° 22 ’ 06 ’’ N, 28 ° 39 ’ 55 ’’ E, 10 m, sandy mud with shell fragments, 3 specimens; ESFM-POL / 2013 - 1279, 16 June 2013, station Y 27, 40 ° 23 ’ 30 ’’ N, 29 ° 03 ’ 54 ’’ E, 10 m, mud with shell fragments, 2 specimens; ESFM-POL / 2013 - 1280, station Y 27, 40 ° 23 ’ 30 ’’ N, 29 ° 03 ’ 49 ’’ E, 25 m, mud, 8 specimens; ESFM-POL / 2013 - 1282, 16 June 2013, station Y 28, 17 June 2013, 40 ° 57 ’ 20 ’’ N, 28 ° 07 ’ 21 ’’ E, 25 m, sandy mud, 25 specimens; ESFM-POL / 2013 - 1284, 23 June 2013, station Y 33, 40 ° 58 ’ 21 ’’ N, 28 ° 45 ’ 14 ’’ E, 10 m, mud with shell fragments, 22 specimens; ESFM-POL / 2013 - 1285, 22 June 2013, station Y 36, 40 ° 57 ’ 57 ’’ N, 29 ° 01 ’ 14 ’’ E, 10 m, sandy mud, 1 specimen; ESFM-POL / 2013 - 1287, 21 June 2013, station Y 37, 40 ° 52 ’ 22 ’’ N, 29 ° 13 ’ 23 ’’ E, sandy mud with shell fragments, 10 m, 11 specimens; ESFM-POL / 2013 - 1289, 19 June 2013, station Y 39, 40 ° 39 ’ 36 ’’ N, 29 ° 09 ’ 18 ’’ E, 10 m, sandy mud with dark detritic material, 3 specimens; ESFM-POL / 2013 - 1290, 20 June 2013, station Y 42, 40 ° 46 ’ 37 ’’ N, 29 ° 28 ’ 54 ’’ E, 10 m, sand, 1 specimen; ESFM-POL / 2013 - 1292, 20 June 2013, station Y 43, 40 ° 41 ’ 29 ’’ N, 29 ° 35 ’ 33 ’’ E, 10 m, sandy mud with shell fragments, 4 specimens; ESFM-POL / 2013 - 1293, 20 June 2013, station Y 44, 40 ° 46 ’ 28 ’’ N, 29 ° 41 ’ 52 ’’ E, 10 m, mud with shell fragments, 2 specimens; ESFM- POL / 2013 - 1294, 20 June 2013, station Y 45, 40 ° 44 ’ 33 ’’ N, 29 ° 55 ’ 46 ’’ E, 10 m, mud with shell fragments, 1 specimens; ESFM-POL / 2013 - 1297, 20 June 2013, station Y 48, 41 ° 07 ’ 36 ’’ N, 29 ° 05 ’ 29 ’’ E, 25 m, 1 specimen; ESFM-POL / 2013 - 1299, 26 June 2013, station Y 49, 41 ° 09 ’ 15 ’’ N, 29 ° 02 ’ 20 ’’ E, 10 m, mud, 7 specimens; ESFM-POL / 2013 - 1301, 26 June 2013, station Y 49, 41 ° 09 ’ 08 ’’ N, 29 ° 02 ’ 40 ’’ E, 25 m, mud with shell fragments, 9 secimen; Black Sea: ESFM- POL / 2014 - 635, 12 July 2014, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 27 m, mud with shell fragments, 1 specimen; ESFM-POL / 2014 - 636, 13 July 2014, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 21 m, coarse sand with shell fragments, 2 specimens; ESFM-POL / 2014 - 637, 14 July 2014, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 21 m, coarse sand with phytodetritic material, 3 specimens; ESFM-POL / 2014 - 638, 14 July 2014, staion TRK 16, 41 ° 43 ’ 10 ” N, 32 ° 4 ’ 60 ” E, 21 m, shell fragments with phytodetritic material, 2 specimens; ESFM-POL / 2014 - 639, 14 July 2014, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 21 m, shell fragments with phytodetritic material, 4 specimens; ESFM- POL / 2014 - 640, 15 July 2014, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 25 m, mud with shell fragments, 3 specimens; ESFM-POL / 2014 - 641, 17 July 2014, station TRK 34 Y, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 21 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2014 - 642, 18 July 2014, station TRK 44, 41 ° 4 ’ 2 ” N, 38 ° 2 ’ 49 ” E, 52 m, shell fragments with phytodetritic material, 4 specimens; ESFM-POL / 2014 - 643, 19 July 2014, station TRK 53, 41 ° 0 ’ 54 ” N, 38 ° 27 ’ 20 ” E, mud with phytodetritic material, 52 m, 1 specimen; ESFM-POL / 2015 - 286, 02 July 2015, station TRK 1, 41 ° 55 ’ 34 ” N, 28 ° 12 ’ 27 ” E, 21 m, shell fragments with fine sand, 3 specimens; ESFM-POL / 2015 - 287, 03 July 2015, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 20 m, shell fragments with fine sand, 1 specimen; ESFM-POL / 2015 - 286, 04 July 2015, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 13 m, shell fragments with phytodetritic material, 10 specimens; ESFM-POL / 2015 - 288, 04 July 2015, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 18 m, shell fragments with fine sand and phytodetritic material, 4 specimens; ESFM-POL / 2015 - 289, 05 July 2015, station TRK 22, 42 ° 02 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 21 m, shell fragments with detritic material, 2 specimens; ESFM-POL / 2015 - 290, 08 July 2015, station TRK 34 Y, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 20 m, mud and fine sand with detritic material, 2 specimens; ESFM-POL / 2015 - 291, 11 July 2015, station TRK 55, 41 ° 1 ’ 45 ” N, 39 ° 54 ’ 15 ” E, 35 m, shell fragments with detritic material, 2 specimens; ESFM-POL / 2015 - 292, 11 July 2015, station TRK 61, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 65 m, shell fragments with detritic material, 1 specimen; ESFM-POL / 2016 - 229, 24 July 2016, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 20 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2016 - 230, 26 July 2016, station TRK 16, 41 ° 43 ’ 10 ” N, 32 ° 4 ’ 60 ” E, 20 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2016 - 231, 25 July 2016, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 45 m, mud with shell fragments and phytodetritic material, 8 specimens; ESFM-POL / 2016 - 232, 27 July 2016, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 60 m, mud with shell fragments, 3 specimens; ESFM-POL / 2016 - 233, 27 July 2016, station TRK 34 Y, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 21 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2016 - 234, 27 July 2016, station TRK 35, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 50 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2016 - 235, 28 July 2016, station TRK 44, 41 ° 2 ’ 43 ” N, 38 ° 3 ’ 20 ” E, 51 m, shell fragments with phytodetritic material, 3 specimens; ESFM-POL / 2016 - 236, 31 July 2016, station TRK 55, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 26 m, shell fragments with phytodetritic material, 5 specimens; ESFM-POL / 2016 - 237, 01 August 2016, station TRK 61, 41 ° 46 ’ 0 ” N, 41 ° 31 ’ 0 ” E, 69 m, shell fragments with phytodetritic material, 2 specimens; ESFM-POL / 2017 - 191, 26 July 2017, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 43 m, mud and shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2017 - 192, 27 July 2017, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 27 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2017 - 193, 27 July 2017, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 19 m, mud with shell fragments, 1 specimen; ESFM-POL / 2017 - 194, 30 July 2017, station TRK 34 Y, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 20 m, mud with phytodetritic material, 2 specimens; ESFM-POL / 2017 - 195, 30 July 2017, station TRK 35, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 51 m, mud with shell fragments, 8 specimens; ESFM-POL / 2017 - 196, 31 July 2017, station TRK 37, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 8 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2017 - 197, 31 July 2017, station TRK 44, 41 ° 4 ’ 2 ” N, 38 ° 2 ’ 49 ” E, 48 m, shell fragments with phytodetritic material, 5 specimens; ESFM-POL / 2018 - 143, 24 July 2018, station TRK 16, 41 ° 43 ’ 10 ” N, 32 ° 4 ’ 60 ” E, 22 m, mud with detritic material, 1 specimen; ESFM-POL / 2018 - 144, 27 July 2018, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 24 m, mud with phytodetritic material, 4 specimens; ESFM-POL / 2018 - 145, 28 July 2018, station TRK 34 Y, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 48 m, mud, 6 specimens; ESFM-POL / 2018 - 146, 28 July 2018, station TRK 35, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 20 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2018 - 147, 31 July 2018, station TRK 55, 41 ° 3 ’ 60 ” N, 40 ° 38 ’ 24 ” E, 25 m, sand, 1 specimen; ESFM-POL / 2018 - 148, 01 August 2018, station TRK 61, 41 ° 46 ’ 0 ” N, 41 ° 31 ’ 0 ” E, 45 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2019 - 46, 7 July 2019, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 14 m, fine sand with shell fragments, 1 specimen; ESFM-POL / 2019 - 47, 08 July 2019, station TRK 19, 42 ° 6 ’ 47 ” N, 33 ° 3 ’ 35 ” E, 24 m, mud with shell fragments, 1 specimen; ESFM- POL / 2019 - 48, 10 July 2019, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 24 m, mud 5 specimens; ESFM- POL / 2019 - 49, 14 July 2019, station TRK 44, 41 ° 2 ’ 43 ” N, 38 ° 3 ’ 20 ” E, 48 m, clay and phytodetritic material, 3 specimens; ESFM-POL / 2019 - 50, 15 July 2019, 41 ° 1 ’ 45 ” N, 39 ° 54 ’ 15 ” E, station TRK 53, 35 m, mud with sand and detritic material, 4 specimens; ESFM-POL / 2019 - 51, 16 July 2019, station TRK 61, 41 ° 46 ’ 0 ” N, 41 ° 31 ’ 0 ” E, 45 m, mud, 2 specimens.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD1A91638B4AAFAFD65A284.taxon	description	Description. Largest specimen complete, 65.7 mm long and 3.14 mm wide, with 91 chaetigers. Body wider anteriorly and tapering gradually from middle region to pygidium. Colour cream in ethanol, some large specimens with dark-brownish pigmentation on anterior region (on dorsal side of first 10 – 15 chaetigers). Prostomium subrectangular (0.43 mm long, 0.54 mm wide), anterior margin slightly convex, posterior margin “ U ” shaped. Shape of prostomium changes to subpentagonal and posterior margin of prostomium changes to “ V ” shaped when pharynx everted (Fig. 6 A). One pair of eyes visible on prostomium of small specimens. One pair of conspicuous nuchal organ situated in postero-lateral margin of prostomium. Antennae conical, smaller (90 µm) than palps. Palps and ventral cirri of chaetiger 1 having similar size (150 µm) and shape (broad base and tapering distally). One pair of dark brown jaws (0.8 mm), triangular, deeply incised at base (Fig. 6 F), situated on antero-lateral margin of pharynx. Pharynx with 10 bifid terminal papillae (0.3 mm) separated by a dorsal and ventral gap; 22 rows of 3 – 5 conical subdistal papillae (largest one 0.3 mm), extending over 1 / 3 length of pharynx. Proximal region smooth. Middorsal papilla long (0.5 mm), slender and conical (Fig. 6 A), midventral papilla absent. Parapodia of chaetiger 1 smaller than subsequent ones, directed forward parallel to prostomium, having only a lamelliform dorsal and ventral cirri and well developed acicular lobes. Postchaetal lamellae well developed on neuropodia of chaetiger 3 and on notopodia of chaetiger 4 (same in small and large specimens). Parapodia biramous; interramal space “ U ” shaped. In anterior region (chaetiger 10) notopodial postchaetal lamellae truncated, longer than acicular lobe. Neuropodial postchaetal lamellae (0.7 mm) rounded, longer than acicular lobes (0.4 mm). Notopodial prechaetal lamellae rounded, neuropodial prechaetal lamella triangular, both almost equal in size to acicular lobe (Fig. 6 B). In middle region (chaetiger 20 – 40) notopodial postchaetal lamellae truncated, rounded after chaetiger 25 – 30, longer than acicular lobe. Neuropodial postchaetal lamellae rounded (1 mm, to base of neuropodia), almost two times longer than acicular lobe (0.5 mm). Noto- and neuropodial prechaetal lamellae unequally bilobed [inner parts much larger than outer ones (Figs. 6 C, D)]. In posterior region (chaetiger 80) notopodial postchaetal lamellae more rounded and almost equal in size to acicular lobe. Neuropodial postchaetal lamellae (0.7 mm) almost two times longer than acicular lobe (0.3 mm) (Fig. 6 E) but reduced in size on last 10 – 11 chaetigers. Ventral margin of neuropodial postchaetal lamellae bending up towards dorsal side and enlarging towards tips in middle and posterior parapodia (Figs. 6 D, E). Prechaetal lamellae of posterior chaetigers similar in shape (bilobed unequally) with those median chaetigers. Acicular lobes rounded on anterior chaetigers and becoming more conical in middle and posterior end. A prominent papilliform outgrowth of acicular lobe first appearing on chaetiger 5 (on chaetigers 3 and 4 in large specimens) and lacking in last 30 – 35 chaetigers. Dorsal cirri small (0.2 mm), digitiform on anterior chaetigers, becoming conical on middle and posterior chaetigers. Ventral cirri small (0.13 mm), conical. Branchiae long and cirriform, recurved, first appearing on chaetigers 4 – 6, continuing to posterior end, absent in last 2 – 12 parapodia (Figs. 6 B – E). Papillae-like basal projection first appearing on dorsal surface of second branchiae, becoming larger posteriorly, almost as long as dorsal cirri in posterior chaetigers. Interramal space and branchiae heavily ciliated, especially in anterior chaetigers. Three types of chaetae present in parapodia: capillary chaetae, spinulated chaetae and barred chaetae. Chaetiger 1 with 7 – 8 barred and 3 – 4 spinulated chaetae with very smooth teeth in notopodia, and 17 – 18 capillary chaetae in neuropodia. Subsequent chaetigers with 15 – 17 barred chaetae (500 µm) in preacicular position of noto- and neuropodia (Fig. 6 G) and 20 – 25 spinulated chaetae (1000 µm) with one lateral row of spines in postacicular position of noto- and neuropodia (Fig. 6 H). Acicula reddish-brown, thicker on posterior chaetigers, numbering one per ramus; with a straight tip in anterior parapodia, with a curved tip in posterior parapodia. Pygidium rounded with one digitiform anal cirrus placed dorsally, as long as the last 5 – 6 chaetigers.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD1A91638B4AAFAFD65A284.taxon	discussion	Remarks. The Black Sea and the Sea of Marmara’s specimens of Nephtys hombergii mostly match the original and subsequent descriptions of the species. However, there are some variation in where the branchiae first appear among populations from different regions. The first appearence of branchiae have been mostly reported on chaetiger 4 or 5: on chaetiger 4 in the specimens from Dinar (French Atlantic coast) (Saint-Joseph 1894), North Sea (Heinen 1911) and eastern Australian coast (Tebble 1955), on chaetiger 5 in the British specimens (McIntosh 1908), and on chaetigers 4 or 5 (rarely on chaetiger 6) on the specimens from the north Atlantic (Ravara et al. 2010) and Black Sea (Dnestrovskaya 2020). Branchiae usually start on chaetiger 5 (rarely on chaetiger 4) in the Black Sea specimens, and on chaetiger 4 or 6 (rarely on chaetiger 5) in the Sea of Marmara specimens.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFD1A91638B4AAFAFD65A284.taxon	distribution	Distribution. Atlantic Ocean (Rainer 1991; Ravara et al. 2010; Gil 2011; Gillet 2017); Mediterranean Sea (Laborda 2004; Castelli et al. 2008; Çinar et al. 2014; Mikac 2015); Black Sea (Kiseleva 2004; Surugiu 2006; Kurt- Şahin & Çinar 2012; Çinar et al. 2014; Kurt-Şahin et al. 2017 a; Dnestrovskaya 2020). Habitat. Nephtys hombergii occurs in fine sand and mud in shallow and deep waters [557 m (Rainer 1991); 330 m (Gil 2011);> 600 m (Çinar et al. 2014); up to 1000 m (Laborda 2004)]. In this study, it was found between 0 – 50 m in the Sea of Marmara and 0 – 72 m in the Black Sea.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCDA91538B4AAFAFEA8A1D9.taxon	description	(Figure 7)	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCDA91538B4AAFAFEA8A1D9.taxon	materials_examined	Material examined. Sea of Marmara: ESFM-POL / 2013 - 1007, 06 June 2013, station Y 1, 40 ° 01 ’ 27 ’’ N, 26 ° 13 ’ 24 ’’ E, 10 m, mud with dark detritic material, 1 specimen; ESFM-POL / 2013 - 1136, 06 June 2013, station Y 1, 40 ° 00 ’ 32 ’’ N, 26 ° 13 ’ 04 ’’ E, 25 m, mud, 1 specimen; ESFM-POL / 2013 - 1139, 07 June 2013, station Y 5, 40 ° 20 ’ 55 ’’ N, 26 ° 40 ’ 38 ’’ E, 25 m, mud, 10 specimens; ESFM-POL / 2013 - 1143, 07 June 2013, station Y 5, 40 ° 21 ’ 21 ’’ N, 26 ° 39 ’ 59 ’’ E, 50 m, mud with Amphiura filiformis, 1 specimen; ESFM-POL / 2013 - 1144, 07 June 2013, station Y 6, 40 ° 26 ’ 10 ’’ N, 26 ° 41 ’ 51 ’’ E, 10 m, mud, 1 specimens; ESFM-POL / 2013 - 1149, 07 June 2013, station Y 6, 40 ° 26 ’ 03 ’’ N, 26 ° 41 ’ 59 ’’ E, 25 m, mud, 10 specimens; ESFM-POL / 2013 - 1150, 07 June 2013, station Y 8, 40 ° 25 ’ 15 ’’ N, 27 ° 03 ’ 49 ’’ E, 10 m, mud, 1 specimen; ESFM-POL / 2013 - 1160, 07 June 2013, station Y 8, 40 ° 25 ’ 27 ’’ N, 27 ° 03 ’ 34 ’’ E, 25 m, mud with Amphiura filiformis, 3 specimen; ESFM-POL / 2013 - 1163, 08 June 2013, station Y 9, 40 ° 28 ’ 09 ’’ N, 27 ° 11 ’ 14 ’’ E, 50 m, sandy mud, 2 specimen; ESFM-POL / 2013 - 1168, 08 June 2013, station Y 11, 40 ° 36 ’ 12 ’’ N, 27 ° 05 ’ 20 ’’ E, 10 m, sandy mud, 3 specimen; ESFM-POL / 2013 - 1170, 08 June 2013, station Y 11, 40 ° 35 ’ 55 ’’ N, 27 ° 05 ’ 25 ’’ E, 25 m, sandy mud with shell fragments, 10 specimen; ESFM-POL / 2013 - 1172, 08 June 2013, station Y 11, 40 ° 34 ’ 50 ’’ N, 27 ° 05 ’ 59 ’’ E, 50 m, mud with Amphiura filiformis, 2 specimen; ESFM-POL / 2013 - 1178, station Y 12, 40 ° 40 ’ 38 ’’ N, 27 ° 16 ’ 25 ’’ E, 10 m, fine sand with Spisupa sp. shell fragments, 1 specimens; ESFM-POL / 2013 - 1179, 08 June 2013, station Y 12, 40 ° 39 ’ 44 ’’ N, 27 ° 17 ’ 00 ’’ E, 25 m, mud with Amphiura filiformis, 1 specimens; ESFM-POL / 2013 - 1188, 08 June 2013, station Y 12, 40 ° 39 ’ 44 ’’ N, 27 ° 17 ’ 00 ’’ E, 50 m, mud with Amphiura filiformis, 1 specimen; ESFM-POL / 2013 - 1193, 10 June 2013, station Y 13, 40 ° 45 ’ 15 ’’ N, 27 ° 20 ’ 49 ’’ E, 50 m, mud, 1 specimen; ESFM- POL / 2013 - 1196, 08 June 2013, station Y 14, 40 ° 24 ’ 03 ’’ N, 27 ° 19 ’ 23 ’’ E, 10 m, mud with Amphiura filiformis, 17 specimens; ESFM-POL / 2013 - 1199, 08 June 2013, station Y 14, 40 ° 24 ’ 22 ’’ N, 27 ° 20 ’ 48 ’’ E, 25 m, mud with Amphiura filiformis, 3 specimens; ESFM-POL / 2013 - 1201, 08 June 2013, station Y 15, 40 ° 19 ’ 11 ’’ N, 27 ° 33 ’ 51 ’’ E, 10 m, sandy mud, 42 specimens; ESFM-POL / 2013 - 1204, 08 June 2013, station Y 15, 40 ° 19 ’ 47 ’’ N, 27 ° 31 ’ 40 ’’ E, 25 m, mud with Amphiura filiformis, 2 specimens; ESFM-POL / 2013 - 1206, 09 June 2013, station Y 16, 40 ° 18 ’ 39 ’’ N, 27 ° 45 ’ 43 ’’ E, 25 m, mud with Amphiura filiformis, 8 specimens; ESFM-POL / 2013 - 1211, 09 June 2013, station Y 16, 40 ° 24 ’ 13 ’’ N, 27 ° 39 ’ 47 ’’ E, 41 m, mud with Amphiura filiformis, 1 specimen; ESFM-POL / 2013 - 1214, 09 June 2013, station Y 17, 40 ° 39 ’ 09 ’’ N, 27 ° 41 ’ 14 ’’ E, 25 m, mud, 1 specimen; ESFM-POL / 2013 - 1215, 10 June 2013, station Y 18, Y 18, 40 ° 54 ’ 28 ’’ N, 27 ° 33 ’ 24 ’’ E, 25 m, muddy sand with Lithothamnion sp., 1 specimen; ESFM- POL / 2013 - 1219, 12 June 2013, station Y 20, 40 ° 57 ’ 51 ’’ N, 27 ° 55 ’ 24 ’’ E, 10 m, sandy mud with shell fragments, 3 specimens; ESFM-POL / 2013 - 1222, 16 June 2013, station Y 25, 40 ° 24 ’ 48 ’’ N, 28 ° 20 ’ 41 ’’ E, 25 m, sandy mud with shell fragments, 2 specimens; ESFM-POL / 2013 - 1223, 16 June 2013, station Y 26, 40 ° 22 ’ 36 ’’ N, 28 ° 39 ’ 41 ’’ E, 25 m, mud with Turitella shell fragments, 4 specimens; ESFM-POL / 2013 - 1225, 16 June 2013, station Y 27 40 ° 23 ’ 30 ’’ N, 29 ° 03 ’ 49 ’’ E, 25 m, mud, 2 specimens; ESFM-POL / 2013 - 1226, 16 June 2013, Y 27, 40 ° 23 ’ 30 ’’ N, 29 ° 03 ’ 23 ’’ E, 50 m, mud, 1 specimen; ESFM-POL / 2013 - 1228, 17 June 2013, station Y 28, 40 ° 57 ’ 20 ’’ N, 28 ° 07 ’ 21 ’’ E, 25 m, sandy mud, 3 specimens; ESFM-POL / 2013 - 1230, 17 June 2013, station Y 29, 40 ° 32 ’ 34 ’’ N, 28 ° 46 ’ 53 ’’ E, 25 m, muddy sand with Lithothamnion sp., 1 specimen; ESFM-POL / 2013 - 1231, 14 June 2013, station Y 31, 41 ° 01 ’ 25 ’’ N, 28 ° 26 ’ 23 ’’ E, 25 m, muddy sand with Lithothamnion sp., 1 specimen; ESFM-POL / 2013 - 1232, 19 June 2013, station Y 40, 40 ° 41 ’ 22 ’’ N, 29 ° 20 ’ 58 ’’ E, 25 m, sandy mud with shell fragments, 1 specimen; ESFM-POL / 2013 - 1234, 19 June 2013, station Y 40, 40 ° 41 ’ 54 ’’ N, 29 ° 20 ’ 46 ’’ E, 50 m, mud with shell fragments, 1 specimen; ESFM-POL / 2013 - 1235, 26 June 2013, station Y 49, 41 ° 09 ’ 15 ’’ N, 29 ° 02 ’ 20 ’’ E, 10 m, mud, 1 specimen.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCDA91538B4AAFAFEA8A1D9.taxon	description	Description. The largest complete specimen 36 mm long, 2.8 mm wide, with 72 chaetigers. Body wider anteriorly and tapering gradually from middle chaetigers 20 – 25 to posterior end. Colour cream or light brownish in ethanol. When pharynx everted, prostomium subpentagonal (Fig. 7 A), anterior margin convex, posterior margin “ V ” shaped; when pharynx not everted, prostomium subrectangular (0.5 mm long, 0.3 mm wide), with slightly convex anterior and “ U ” shaped posterior margins. Antennae and palps conical and small (0.1 mm), equal in length, palps arising at ventro-lateral margin of prostomium. One pair of eyes visible only in small specimens. Nuchal organs rounded, conspicuous. One pair of dark brown jaws, triangular (Fig. 7 F), situated on antero-lateral margin of pharynx. Pharynx with 10 bifid terminal papillae, separated by dorsal and ventral gap. 22 rows of 3 – 4 small subterminal papillae; middorsal papilla conical (0.4 mm), almost four times longer than subterminal papillae (0.07 mm); midventral papilla absent; proximal region of pharynx smooth. Parapodia biramous, interramal space “ U ” shaped on anterior and middle chaetigers, becoming “ V ” shaped towards posterior body. Parapodia of chaetiger 1 small, directed dorsally, reaching level of prostomium, with a lamelliform dorsal and conical ventral cirri (0.08 mm long) and well developed acicular lobes. Neuropodial and notopodial postchaetal lamellae well developed from chaetiger 3 and 5, respectively. Pre- and postchaetal lamellae relatively well developed, but not extending beyond acicular lobes; rounded, as long as acicular lobes in anterior chaetigers (Fig. 7 B), smaller than acicular lobes in middle and posterior chaetigers (Figs. 7 C – E). Acicular lobes rounded to oblique in anterior chaetigers, conical in middle region and almost acutely pointed in posterior chaetigers. Dorsal cirri leaf-like in anterior chaetigers, conical in middle and posterior regions. Ventral cirri small (0.1 mm) and conical (half the length of dorsal cirri). Branchiae recurved, cirriform, first appearing on chaetiger 9 – 10 (rarely on chaetiger 8 – 11), absent on last 25 – 30 chaetigers; heavily ciliated on anterior and middle chaetigers, becoming similar in size to dorsal cirri on last 7 – 8 posterior chaetigers. Three types of chaetae present in parapodia: capillary chaetae, barred chaetae and spinulated chaetae. Chaetiger 1 with 15 – 18 capillary chaetae (500 µm) in neuropodia, arranged in a bundle; 8 – 10 barred and 6 – 7 spinulated chaetae with very smooth teeth in notopodia. Noto- and neuropodia of subsequent chaetigers with 11 – 12 barred chaetae (400 µm) on preacicular position (Fig. 7 G), and up to 20 – 22 finely spinulated chaetae (1000 µm) with one lateral row of spines on postacicular position (Fig. 7 H). Barred chaetae thick and long in anterior chaetigers, bar area of chaetae covering almost 1 / 3 of total chaetae and becoming thinner towards posterior end (bar area 200 µm on chaetiger 20; 100 µm on chaetiger 60; see arrow in Fig. 7 G). One reddish-brown acicula per ramus; with straight tip on anterior and middle chaetigers, with curved tip in posterior chaetigers. Pygidium rounded with one digitiform anal cirrus placed dorsally, as long as the last 3 – 4 chaetigers.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCDA91538B4AAFAFEA8A1D9.taxon	discussion	Remarks. The morphology of the Sea of Marmara specimens of Nephtys incisa coincides with those in the original and subsequent descriptions.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCDA91538B4AAFAFEA8A1D9.taxon	distribution	Distribution. Only found in the Sea of Marmara in the present study. Previously reported from the Atlantic Ocean (Rainer 1990; 1991; Ravara et al. 2010; Gillet 2017), Mediterranean Sea (Laborda 2004; Castelli et al. 2008; Ravara et al. 2010; Çinar et al. 2014; Mikac 2015) and Black Sea (Kurt-Şahin et al. 2017 b). Habitat. From lower intertidal zone up to 1700 m depths (Rainer 1990; Laborda 2004; Çinar et al. 2014). This species was found in soft bottoms (sand, sandy mud with shell fragments, etc.) between 10 – 50 m depths in the present study.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCEA91338B4A833FB9EA340.taxon	description	(Figure 8)	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCEA91338B4A833FB9EA340.taxon	materials_examined	Material examined. Sea of Marmara: ESFM-POL / 2013 - 1321, 06 June 2013, station Y 1, 40 ° 00 ’ 32 ’’ N, 26 ° 13 ’ 04 ’’ E, 25 m, mud with black detritic material, 1 specimen; ESFM-POL / 2013 - 1351, 07 June 2013, station Y 5, 40 ° 20 ’ 55 ’’ N, 26 ° 40 ’ 38 ’’ E, 25 m, mud, 13 specimens; ESFM-POL / 2013 - 1353, 07 June 2013, station Y 5, 40 ° 21 ’ 21 ’’ N, 26 ° 39 ’ 59 ’’ E, 50 m, mud with Amphiura filiformis, 1 specimen; ESFM-POL / 2013 - 1515, 08 June 2013, station Y 9, 40 ° 26 ’ 25 ’’ N, 27 ° 11 ’ 29 ’’ E, 25 m, mud with Amphiura filiformis, 2 specimens; ESFM-POL / 2013 - 1356, 16 June 2013, station Y 22, 40 ° 22 ’ 18 ’’ N, 28 ° 00 ’ 41 ’’ E, 10 m, sand, 1 specimen; ESFM-POL / 2013 - 1357, 19 June 2013, station Y 39, 40 ° 39 ’ 36 ’’ N, 29 ° 09 ’ 18 ’’ E, 10 m, sandy mud with detritic material, 1 specimen.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCEA91338B4A833FB9EA340.taxon	description	Description. Largest specimen complete, 22.9 mm long, 1 mm wide, with 69 chaetigers. Colour cream or light brownish in ethanol. When pharynx not everted, prostomium subrectangular (0.2 mm long, 0.2 mm wide), anterior margin straight, posterior margin “ U ” shaped; when pharynx everted, prostomium becoming subpentagonal, with a “ V ” shaped posterior margin (Fig. 8 A). Antennae (0.07 mm) and palps (0.09 mm) conical and similar in length, palps arising at ventro-lateral margin of prostomium (Fig. 8 A). Pharynx with 10 pairs of bifid papillae (0.17 mm), separated by a dorsal and ventral gap; 22 rows of 4 – 6 long subterminal papillae (0.13 mm); middorsal papilla very long (0.4 mm), conical; midventral papilla absent, proximal part of pharynx smooth. Nuchal organs rounded, conspicuous. Two visible eyes only in small specimens. One pair of brownish jaws, triangular in shape, situated on the antero-lateral margin of pharynx (Fig. 8 I). Chaetiger 1 smaller than subsequent ones, directed anteriorly, parallel to prostomium; ventral cirri conical (0.07 mm) with a broad base, as long as antennae and palps. Parapodia biramous, “ U ” shaped in anterior region, “ V ” shaped in middle and posterior regions. Prechaetal lamellae well developed on chaetiger 2. Neuropodial and notopodial postchaetal lamellae well developed from chaetiger 3 and 4, respectively. In anterior parapodia (chaetiger 10), notopodial postchaetal lamellae rounded, 1 / 3 times longer than acicular lobe. Neuropodial postchaetal lamellae well developed, rounded with slightly angular corners, ½ times longer than acicular lobe; noto- and neuropodial prechaetal lamellae rounded, smaller than acicular lobes (Fig. 8 B). On middle parapodia (chaetiger 20 – 40), notopodial postchaetal lamellae slightly truncated, longer than acicular lobe, neuropodial postchaetal lamellae rounded with slightly angular corners (see arrow at Fig. 8 C), two times longer than acicular lobe; prechaetal lamellae bilobed; in notopodia, ventral parts slightly larger than dorsal parts in notopodia, and clearly unequal in neuropodia (Figs. 8 C, D). In posterior parapodia (chaetiger 60), notopodial postchaetal lamellae rounded, similar size to acicular lobes, neuropodial postchaetal lamellae rounded, equal or slightly longer than acicular lobe; notopodial prechaetal lamellae bilobed with equal parts, neuropodial prechaetal lamellae unequally bilobed, both smaller than acicular lobes (Fig. 8 E). Acicular lobes rounded (Fig. 8 B) on anterior chaetigers, conical on middle and posterior chaetigers; with a rugose (zigzag-like structure) area (Fig. 8 F) in the ventral surface of the acicular lobes, close to the acicula (difficult to see); clearly seen between chaetigers 8 and 20, indistinct / absent in subsequent chaetigers. Dorsal cirri small (0.08 mm), conical to digitiform. Ventral cirri conical in whole body, about as long as dorsal cirri. Branchiae recurved, cirriform, with conspicuous papillae-like basal projection (similar in size to dorsal cirri on posterior chaetigers); present from chaetiger 4 to posterior end, except for last 5 – 6 chaetigers (Figs. 8 B – E). Three types of chaetae present in parapodia; capillary chaetae, barred chaetae and spinulated chaetae. Chaetiger 1 with 15 – 18 capillary chaetae (300 µm) arranged in a bundle in neuropodia, 6 – 7 barred (Fig. 8 G) and 3 – 4 spinulated (Fig. 8 H) chaetae with very smooth teeth in notopodia. Noto- and neuropodia of subsequent parapodia with up to 11 barred chaetae on preacicular position and up to 15 – 16 spinulated chaetae with one lateral row of spines on postacicular position. Barred chaetae thick in anterior chaetigers, thin in posterior chaetigers; bar occupying area diminishing towards posterior end; only a basal area of 0.1 mm lacking bars on chaetiger 10, while an area of 1.2 mm lacking bars on chaetiger 50. One reddish-brown acicula present per ramus; with a straight tip in anterior region, with a strongly curved tip in middle and posterior regions. Pygidium rounded with one digitiform anal cirrus placed dorsally, as long as the last 3 – 4 chaetigers.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCEA91338B4A833FB9EA340.taxon	discussion	Remarks. Nephtys kersivalensis was originally described by McIntosh (1908) as a young stage of N. hombergii Savigny in Lamarck, 1818. Rainer (1989) provided detailed descriptions of these two closely related species. The Sea of Marmara specimens of N. kersivalensis (largest complete specimen 22.5 mm length with 74 chaetiger) are smaller than those found in the North Sea (39 mm length with 81 chaetiger) by Rainer (1989), in the coasts of Spain (40 mm with 90 chaetiger) by Laborda (2004), and in the southern Europe (up to 40 mm length with 69 chaetiger) by Ravara et al. (2010).	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFCEA91338B4A833FB9EA340.taxon	distribution	Distribution. North Atlantic Ocean (Rainer 1991; Laborda 2004; Ravara et al. 2010; Gil 2011); Mediterranean Sea (Coll et al. 2010), Sea of Marmara (present study). Habitat. This species is typically found in muddy-sand bottoms. It occurs up to 295 m depth (Rainer 1991; Laborda 2004; Gil 2011). It was found at 10 – 50 m depths in the present study.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFC8A91A38B4ABA1FD15A5C8.taxon	description	(Figures 9 – 12) urn: lsid: zoobank. org: act: B 5246 F 9 A- 7912 - 4 CE 0 - A 5 D 8 - 5 B 7 F 9 B 673 F 14	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFC8A91A38B4ABA1FD15A5C8.taxon	materials_examined	Material examined. Holotype: Black Sea: ESFM-POL / 2016 - 243, 26 July 2016, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 19.5 m, sand with shell fragments. Paratypes. Black Sea: ESFM-POL / 2016 - 242, 25 July 2016, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 22 m, shell fragments with phytodetritic material, 21 specimens; ESFM-POL / 2016 - 244, 26 July 2016, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 19.5 m, sand with shell fragments, 33 specimens; ESFM-POL / 2016 - 245, 27 July 2016, station TRK 32, 42 ° 0 ’ 57.24 ” N, 35 ° 9 ’ 28.51 ” E, 60 m, mud with shell fragments, 3 specimens; ESFM-POL / 2016 - 246, 27 July 2016, station TRK 35, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 50 m, mud and phytodetritic material, 2 specimens. Additional material. Sea of Marmara: ESFM-POL / 2013 - 1359, 06 June 2013, station Y 1, 40 ° 01 ’ 08 ’’ N, 26 ° 13 ’ 00 ’’ E, 50 m, mud with detritic material, 1 specimen; ESFM-POL / 2013 - 1360, 16 June 2013, station Y 27, 40 ° 23 ’ 30 ’’ N, 29 ° 03 ’ 54 ’’ E, 10 m, mud with shell fragments, 2 specimens; ESFM-POL / 2013 - 1362, 26 June 2013, station Y 50, 41 ° 12 ’ 16 ’’ N, 29 ° 07 ’ 15 ’’ E, 10 m, mud with shell fragments; 8 specimens; Black Sea: ESFM-POL / 2014 - 645, 12 July 2014, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 27 m, mud with shell fragments, 1 specimen; ESFM- POL / 2014 - 646, 13 July 2014, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 21 m, coarse sand with shell fragments, 15 specimens; ESFM-POL / 2014 - 644, 13 July 2014, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 21 m, mud with shell fragments, 41 specimens; ESFM-POL / 2014 - 647, 14 July 2014, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 21 m, coarse sand with phytodetritic material, 5 specimens; ESFM-POL / 2014 - 648, 15 July 2014, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 25 m, mud with shell fragments, 23 specimens; ESFM-POL / 2014 - 649, 15 July 2014, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 21 m, mud with shell fragments, 2 specimens; ESFM-POL / 2014 - 650, 17 July 2014, station TRK 34 Y, 41 ° 33 ’ 40 ” N, 36 ° 34 ’ 19 ” E, 21 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2014 - 651, 17 July 2014, station TRK 37, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 10 m, mud with shell fragments, 1 specimen; ESFM-POL / 2014 - 652, 18 July 2014, station TRK 44, 41 ° 4 ’ 2 ” N, 38 ° 2 ’ 49 ” E, 52 m, shell fragments with phytodetritic material, 2 specimens; ESFM-POL / 2014 - 653, 19 July 2014, station TRK 55, 41 ° 1 ’ 45 ” N, 39 ° 54 ’ 15 ” E, 21 m, mud with shell fragments, 1 specimen; ESFM-POL / 2015 - 294, 02 July 2015, station TRK 1, 41 ° 55 ’ 34 ” N, 28 ° 12 ’ 27 ” E, 21 m, shell fragments with fine sand, 3 specimens; ESFM-POL / 2015 - 295, 03 July 2015, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 21 m, shell fragments with fine sand, 8 specimens; ESFM-POL / 2015 - 296, 03 July 2015, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 20 m, shell fragments with fine sand, 5 specimens; ESFM- POL / 2015 - 293, 04 July 2015, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 13 m, shell fragments with phytodetritic material, 23 specimens; ESFM-POL / 2015 - 297, 04 July 2015, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 18 m, fine sand with shell and detritic fragments, 18 species; ESFM-POL / 2015 - 298, 04 July 2015, station TRK 13 A, 41 ° 35 ’ 23.22 ” N, 32 ° 2 ’ 4.73 ” E, 17 m, shell fragments with fine sand, 7 specimens; ESFM-POL / 2015 - 299, 05 July 2015, station TRK 22, 42 ° 02 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 21 m, phytodetritic material with shell fragments, 11 specimens; ESFM-POL / 2015 - 300, 07 July 2015, station TRK 35, 41 ° 20 ’ 48 ” N, 36 ° 23 ’ 27 ” E, 48 m, mud with fine sand and shell fragments, 3 specimens; ESFM-POL / 2015 - 301, 08 July 2015, station TRK 37, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 9 m, mud with shell fragments and fine sand, 1 specimen; ESFM-POL / 2016 - 239, 24 July 2016, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 20 m, shell fragments with phytodetritic material, 2 specimens; ESFM-POL / 2016 - 238, 24 July 2016, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 12 m, mud with shell fragments, 21 specimens; ESFM-POL / 2016 - 240, 26 July 2016, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 19 m, fine sand with shell fragments, 9 specimens; ESFM- POL / 2016 - 241, 26 July 2016, station TRK 16, 41 ° 43 ’ 10 ” N, 32 ° 4 ’ 60 ” E, 20 m, mud with phytodetritic material, 9 specimens; ESFM-POL / 2017 - 198, 26 July 2016, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 19 m, fine sand with shell fragments, 23 specimens; ESFM-POL / 2017 - 199, 27 July 2017, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 27 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2017 - 200, 27 July 2017, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 19 m, mud with shell fragments, 21 specimens, ESFM-POL / 2017 - 201, 30 July 2017, station TRK 34 Y, 41 ° 19 ’ 40 ” N, 36 ° 32 ’ 10 ” E, 20 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2017 - 202, 31 July 2017, station TRK 37, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 8 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL / 2018 - 150, 22 July 2018, station TRK 10, 41 ° 19 ’ 40 ” N, 30 ° 47 ’ 55 ” E, 21 m, fine sand, 1 specimen; ESFM-POL / 2018 - 149, 22 July 2018, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 14 m, fine sand with shell fragments, 5 specimens; ESFM-POL / 2018 - 151, 23 July 2018, station TRK 13, 41 ° 37 ’ 20 ” N, 31 ° 51 ’ 3 ” E, 20 m, sandy mud with detritic material, 2 specimens; ESFM-POL / 2018 - 152, 25 July 2018, station TRK 22, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 25 m, mud with shell fragments and detritic material, 5 specimens; ESFM-POL / 2018 - 153, 26 July 2018, station TRK 25, 42 ° 16 ’ 60 ” N, 34 ° 56 ’ 14 ” E, 20 m, sand, 1 specimen; ESFM-POL / 2018 - 154, 28 July 2018, station TRK 37, 41 ° 32 ’ 60 ” N, 36 ° 40 ’ 40 ” E, 8.5 m, sand, 1 specimen; ESFM-POL / 2018 - 155, 01 August 2018, station TRK 61, 41 ° 46 ’ 0 ” N, 41 ° 31 ’ 0 ” E, 45 m, mud with phytodetritic material, 1 specimen; ESFM-POL / 2019 - 52, 05 July 2019, station TRK 7, 41 ° 18 ’ 40 ” N, 29 ° 40 ’ 10 ” E, 22 m, mud, 3 specimens; ESFM-POL / 2019 - 53, 07 July 2019, station TRKE 1, 41 ° 23 ’ 36 ” N, 31 ° 38 ’ 11 ” E, 14 m, fine sand with shell fragments, 4 specimens; ESFM-POL / 2019 - 54, station TRK 22, 09 July 2019, 42 ° 2 ’ 34 ” N, 33 ° 49 ’ 33 ” E, 25 m, mud with shell fragments and detritic material, 1 specimen; ESFM-POL / 2019 - 55, 09 July 2019, station TRK 25, 42 ° 16 ’ 60 ’’ N, 34 ° 56 ’ 14 ” E, 20 m, mud, 5 specimens. Other comparative material examined: Nephtys cirrosa Ehlers, 1868, Aegean Sea (Gökçeada), ESFM- POL / 2000 - 625, 13 August 2000, 40 ˚ 07 ’ 22 ” N, 25 ˚ 39 ’ 50 ” E, 15 m, sand, 26 specimens.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFC8A91A38B4ABA1FD15A5C8.taxon	description	Description. Holotype complete, 11.5 mm long, 0.9 mm wide, with 55 chaetigers. Sizes of paratypes varies between 8 – 12 mm long and 0.6 – 0.8 mm wide with 47 – 58 chaetigers. Body wider anteriorly, gradually tapering from middle region to pygidium. Colour cream in ethanol. When pharynx everted, prostomium subpentagonal (0.17 mm) as long as wide, anterior margin convex, posterior margin “ V ” shaped (Figs. 9 A, 10 B); when pharynx not everted, prostomium subrectangular, anterior margin slightly convex, posterior margin “ U ” shaped (Fig. 10 A), extending over chaetiger 1. Antennae (0.09 mm) and palps (0.07 mm) digitiform with swollen tips, palps slightly shorter than antennae, inserted on ventro-lateral margin of prostomium (Figs. 9 A, 10 A, B). Pharynx with 10 pairs of terminal bifid papillae (0.09 mm), separated by a dorsal and ventral gap (Figs. 9 A, 10 C); middorsal papilla slender (0.17 mm), conical, slightly longer than subterminal ones (0.09 mm) (Fig. 10 C); midventral papilla absent; with 21 – 22 rows of 6 – 7 conical subterminal papillae, (3 – 4 long, 3 – 4 small papillae) extending over 2 / 3 length of pharynx (Figs. 9 A, 10 B), proximal region of pharynx smooth. One pair of light brown jaws, triangular in shape, on the antero-lateral margin of pharynx. (Fig. 9 B). One pair of eyes visible in small specimens on chaetiger 3. Nuchal organ rounded, conspicuous. Parapodia of chaetiger 1 without dorsal cirri or lamellae, smaller than subsequent ones, directed anteriorly, close to prostomium. Ventral cirri of chaetiger 1 digitiform with a broad base and swollen tip (Figs. 9 A, 10 A, B), almost ½ times shorter than palps (0.03 mm). Parapodia biramous, interramal space “ U ” shaped anteriorly, becoming “ V ” shaped on posterior parapodia, covered with regular ciliated patches (Fig. 11 C). Prechaetal lamellae well developed on chaetiger 2 – 3. Noto- and neuropodial postchaetal lamellae well developed on chaetiger 4 and 2, respectively. On anterior chaetigers (chaetiger 10), prechaetal lamellae well developed, simple and triangular in neuropodia, bilobed in notopodia; similar in size to acicular lobes in notopodia, slightly longer than acicular lobes in neuropodia; noto- and neuropodial postchaetal lamellae rounded, longer than acicular lobes (Figs. 9 F, 10 D). On middle chaetigers (chaetiger 20 – 40) prechaetal lamellae reducing gradually and fusing with acicular lobe (Figs. 9 G, H, 11 A); noto- and neuropodial postchaetal lamellae rounded (Fig. 11 B), morphologically similar to those on anterior chaetigers, but neuropodial lamellae much longer, extending beyond acicular lobes. On posterior chaetigers (chaetiger 52) prechaetal lamellae almost reduced and appearing as a small piece of acicular lobe in neuropodia (Figs. 9 I, 11 C); noto- and neuropodial postchaetal lamellae, rounded, as long as acicular lobes (Figs. 9 I, 11 C, D). Acicular lobes rounded anteriorly, become conical on middle and posterior chaetigers (Figs. 9 F – I, 11 A, C, D). Dorsal cirri long, cirriform, as long as branchiae on first 7 – 8 anterior chaetigers and last 7 – 8 posterior chaetigers (Figs. 9 F – I, 11 D), smaller than branchiae on middle chaetigers, strongly covered with irregular ciliated patches. Ventral cirri long, digitiform with a tapering tip, almost equal in size to parapodial lobes in posterior chaetigers (Figs. 9 F – I, 11 D, 12 C – E). Branchiae very small on all chaetigers, almost equal in length to dorsal cirri on anterior and posterior chaetigers, recurved in median region, straight in anterior and posterior region; cirriform, starting from chaetiger 4 to posterior end; well developed on chaetigers 9 – 10; occupying 1 / 2 of interramal space when fully developed (Figs. 9 F – I, 11 A, B), with densely ciliated patches, irregularly distributed. Four types of chaetae present in parapodia; capillary chaetae, barred chaetae, geniculate chaetae and spinose chaetae. Chaetiger 1 with 5 – 6 capillary chaetae in neuropodia and 6 – 7 barred chaetae in notopodia. Geniculate chaetae (150 µm) first appearing in noto- and neuropodia of chaetiger 3 or 4, placed on postacicular area, numbering 1 – 4 in each ramus (Figs. 9 C, 12 A). Long spinose chaetae (900 µm) contain randomly scattered spines; first appearing in noto- and neuropodia of chaetiger 2, placed on postacicular area, numbering 20 – 25 in each ramus (Figs. 9 D, 12 B). Barred chaetae (200 µm) first appearing on chaetiger 1, thick in anterior chaetigers, numbering up to 6 in notopodia and up to 8 in neuropodia, becoming thin in posterior chaetigers; bar covering area of chaetae not significantly changing on chaeta from anterior and posterior regions of body (Figs. 9 E, 12 B). Number of barred and geniculate chaetae decreasing towards last two chaetigers. Spinose chaetae still outnumbered (15 – 16) and long even in posterior chaetigers. One yellowish-brown acicula present in each ramus, with a straight tip in anterior and median parapodia; with a curved tip in posterior parapodia. Pygidium rounded with one digitiform anal cirrus placed dorsally, as long as the last 2 – 3 chaetigers. Reproduction. Almost 1 / 4 of the population consists of mature individuals. Eggs appears in the coelomic cavity of posterior chaetigers. The diameter of eggs varied between 75 and 90 μm. Eggs are light yellowish in color and the specimens did not have any morphological modification on the body.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFC8A91A38B4ABA1FD15A5C8.taxon	discussion	Remarks. Nephtys sinopensis n. sp. differs from other Nephtys species by having small body sizes and geniculate chaetae on the postacicular area of the noto- and neuropodia. Nephtys sinopensis n. sp. is morphologically similar to N. cirrosa Ehlers, 1868, but differs from it by a number of characters (see Table 1). The presence of the geniculate chaetae on the postacicular area of the noto- and neuropodia was also mentioned for N. cirrosa, but the number of chaetae in each parapodia are different in these species. Nephtys sinopensis n. sp. bears only up to 4 geniculate chaetae (based on the largest and mature specimen), whereas N. cirrosa has 7 – 15 geniculate chaetae in each ramus (Fauvel 1923; Rainer 1991; Dnestrovskaja & Jirkov 2001; this study). When compared to N. sinopensis n. sp. (8 – 12 mm long, 0.6 – 0.8 mm wide for 47 – 58 chaetigers), N. cirrosa has larger-body sizes (53 mm long for 95 chaetigers (Ehlers 1868); 70 mm long (Kiseleva 2004); 84 mm long for up to 99 chaetigers (Ravara et. al. 2010); 30 mm long for 70 chaetigers in this study). Nephtys sinopensis n. sp. does not present the spatula-shaped prostomium typical for N. cirrosa. In addition, the ventral cirri of chaetiger 1 are equal or slightly longer than the antennae and palps in N. cirrosa, whereas the ventral cirri of chaetiger 1 are almost half as long as the antennae and palps in N. sinopensis n. sp. The proboscis of N. sinopensis n. sp. possesses 21 – 22 rows of 6 – 7 subterminal papillae (some 2 – 3 irregular papillae also count as a row), whereas the proboscis of N. cirrosa has 22 rows of 9 – 10 subterminal papillae. Another important difference between these two species is the shape of acicular lobes, which are conical in N. sinopensis n. sp. vs. unequally bilobed in N. cirrosa. Nephtys cirrosa is commonly known as “ catworm ” because of having extremely long antennae, palp and ventral cirri on chaetiger 1. Although Nephtys ehlersi Heinen 1911 and N. cirrosa were considered as synonymous by Rainer (1991). Ravara et al. (2010) described two different forms of N. cirrosa (A and B) and proposed that the Form B is quite similar to the original description of N. ehlersi, whereas Form A is similar to the original description of N. cirrosa. The Form A is mainly characterized by having rounded to bilobed acicular lobes, rudimentary notopodial prechaetal lamellae and a middorsal papilla subequal in size to the other subterminal papillae. Nephtys cirrosa Form B is mainly characterized by having rounded to conical acicular lobes, well developed and bilobed notopodial prechaetal lamellae and a middorsal papilla longer than the subterminal papillae. The bilobed notopodial prechaetal lamellae and rounded / conical acicular lobes of N. cirrosa Form B are similar to those of N. sinopensis n. sp. However, N. cirrosa form B has relatively larger postchaetal lamellae and orange pigmentation in the prostomium (see Ravara et al., 2010), whereas N. sinopensis n. sp. has smaller postchaetal lamellae and without pigmentation on the prostomium. In addition, N. cirrosa Form B has bilobed neuropodial prechaetal lamellae in the anterior chaetiger (see Ravara et al., 2010, Fig. 15 K), but in N. sinopensis n. sp. they are simple and triangular. More importantly, N. sinopensis n. sp. has longer ventral cirri, as long as the parapodial lobes in the posterior region, which are quite shorter than the parapodial lobes in N. cirrosa Form A and B (see Ravara et al., 2010, Figs. 15 M and 15 G).	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFC8A91A38B4ABA1FD15A5C8.taxon	distribution	Distribution. Black Sea and Sea of Marmara. Habitat. This species is typical in fine sand and muddy substratum. It is widely distributed between 10 and 50 m depth. It was found only at three stations in the Sea of Marmara, but very common in the Black Sea.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFC8A91A38B4ABA1FD15A5C8.taxon	etymology	Etymology. This species name refers from to the type locality, Sinop (Turkey).	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
AB5287C1FFC8A91A38B4ABA1FD15A5C8.taxon	materials_examined	Type locality. Sinop, Turkey, Black Sea.	en	Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan (2021): Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species. Zootaxa 5060 (2): 183-214, DOI: https://doi.org/10.11646/zootaxa.5060.2.2
