taxonID	type	description	language	source
03A8878DFF9DFFBB48B8FCC5493AFD8E.taxon	description	Figs 1 (male habitus), 2 (aedeagus and male sternite X), 3 (female genitalia), 4 (habitat), 5 (map)	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF9DFFBB48B8FCC5493AFD8E.taxon	materials_examined	Studied material. Brazil: Amazonas State, Manaus County, Reserva Florestal Ducke, Igarapé [stream] Acará, (02 ° 57 ’ 07 ’’ S, 059 ° 57 ’ 27 ’’ W), 08 – 09. vi. 2018, leg. A. E. Z. Short (2 males and 1 female, INPA).	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF9DFFBB48B8FCC5493AFD8E.taxon	description	Male description. Habitus as in Fig 1. Size (in mm, n = 2): BL: 1.40 – 1.45 / 0.75 – 0.80; head width: 0.42 – 0.43; pronotum length / width: 0.40 – 0.42 / 0.61 – 0.62, pronotum width of the anterior / posterior margins: 0.49 – 0.50 / 0.44 – 0.46; EL / EW: 0.84 – 0.88 / 0.75 – 0.80. Color: Dark brown, with head base, pronotal disc and elytra darker, antennae, maxillary palps and legs testaceous, with yellowish tarsomeres. Head: Frons finely sparsely punctate with short setae, medially smooth and shiny, laterally microreticulate. Clypeus finely punctate, punctures denser than in frons, bearing short setae in posterior half. Labrum slightly longer than clypeus, with a deep medial U-shaped emargination (7.5 – 8.0 x length of labrum), slightly opened towards the apex. Mentum subquadrangular, narrowed anteriorly, with anterior lateral margins pointed and slightly curved inward. Pronotum: Subcordiform. Anterior and posterior margins respectively trisinuate and bisinuate, lateral margin denticulate. Disc raised, with two evident shiny areas and a medial row of punctures forming a transverse deep depression. Anterior half with large, deep punctures, smaller than those of posterior half. Lateral areas densely and finely puncturated, areas between punctures shiny. Posterior half with two rows of large punctures, second row contacting with posterior margin of pronotum. PF 1 deep, extending posteriorly and reaching PF 2, PF 3 wide, PF 3 and PF 4 weakly impressed. Elytra: Markedly convex. Each elytron with 9 rows of punctures, 6 between suture and humeral callus and with a short tenth row of small punctures located between anterior end of fourth and fifth rows. Lateral explanate margin serrate, with two marked spines in its anterior third, narrowing posteriorly and with a small, acute process before suture. Prosternum: Prosternal intercoxal process slightly wider than mesoventral intercoxal process (0.11 / 0.09 mm); prosternal midline length almost 2 x prosternal intercoxal width (0.19 / 0.11 mm). Mesoventrite: Mesosternal intercoxal process subquadrate; posterior margin convex. Metaventrite: Plaques narrow, not contacting and converging anteriorly. Legs: Femora globose, tibiae slightly widened distally. Abdomen: Distance separating coxal cavities approximately 1.2 x mesosternal intercoxal process width (0.12 / 0.09 mm). Ventrites 1 - 5 with long dense setae, ventrites 6 - 7 shiny, with sparsely pubescence. Aedeagus as Fig 2: Parameres of similar shape, large and slender, shorter than main piece; apex of main piece in ventral view curved, hook-shaped, distal lobe globose and developed, similar to those other species in the genus, approximately two times longer than wide. Sternite X and spiculum gastrale as Fig. 2 C. Sternite X oval, covered by scattered short setae on its distal half; spiculum gastrale long, tapering basally and distinctly separated from sternite by a short membrane. Female remarks. The studied specimen is very similar in size (length 1.51 mm, width 0.84 mm) and color to holotype (see Perkins & Ribera 2020). Terminal abdominal segments and spermatheca: Terminal tergite (Fig. 3 a) elliptical. Disc covered by short setae and with distal margin slightly emarginated. Last abdominal ventrite (Fig. 3 b) with two plates. Ventral plate heart-shaped, without subapical tufts of setae. Dorsal plate slightly asymmetrical, surpassing the proximal rim of ventral plate and with two slightly impressed elliptical depressions. Spermatheca (Figs 3 c, d) distinctly long, straight and distally capitate. Sexual dimorphism. Male (Fig. 1) similar to female in external morphology (compare with Fig. 2 in Perkins & Ribera, 2020), but smaller (ca. 1.38 - 1.45 x 0.75 - 0.80 mm opposite to female ca. 1.50 - 1.51 x 0.83 - 0.84 mm) and with elytral margins slightly wider than in female. Tibiae without sexually dimorphic characters. Taxonomic remarks. Adelphydraena amazonica has a characteristic chordate pronotum and a developed serrate elytral margin and thus, resembles A. surinamensis and A. spinosa. It also resembles A. spangleri, but this species is considerably bigger and lacks serrate elytral margins. Conversely, the male genitalia of A. amazonica and A. spangleri are similar, especially their main pieces. Based on morphological similarities these four species seem to be closely related, while the fifth known species, A. orchymonti, has a slightly diverging shape. This is congruent with the partial phylogenetic arrangement based on molecular data revealed in Perkins & Ribera (2020).	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF9DFFBB48B8FCC5493AFD8E.taxon	distribution	Distribution and habitat. Specimens were collected in the type-locality of the species, a shaded forest stream at “ Ducke Forest Reserve ”, nearby Manaus city, Amazonas, Brazil. This typical Amazonian stream is a permanent creek (Fig. 4 a), which exhibits seasonal water level fluctuations. During the rainy season, the water table increases significantly, frequently overflowing the stream banks and creating lateral swamp pools. The three reported specimens were collected in a temporal lateral pool, close to the stream banks (Fig. 4 b), filled stream water, leaf litter and exposed roots.	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF99FFB948B8F8A04995FD8E.taxon	description	Fig. 5	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF99FFB948B8F8A04995FD8E.taxon	materials_examined	Brazil: Roraima State, Amajari County, “ Lago ao lado da ponte do rio Uraricoera [lake besides bridge] ” (03 ° 27 ’ 59.4 ” N 60 ° 54 ’ 37.6 ” W), 19 / iii / 2014, leg. C. J. Benetti (24 specimens, INPA) Brazil: Minas Gerais State, Várzea da Palma County, “ poça na entrada da cidade ” [pond at the entrance of the city], (17 ° 36 ’ 34 ’’ S 044 ° 43 ’ 55 ’’ W), 513 m., 02. iii. 2018, leg. C. J. Benetti et al. (3 males, 8 females, INPA). Brazil: Bahia State, Guanambi County, “ BR 122, 10 km depois de Guanambi ” [BR 122 road, 10 Km after Guanambi], (14 ° 19 ’ 05.2 ’’ S 042 ° 47 ’ 10.8 ’’ W), 525 m., 27. ii. 2018, leg. C. J. Benetti et al. (12 males, 19 females, INPA). Brazil: Bahia State, Brumado County, “ BR 030, Lago depois de Brumado, estrada para Caetité [lake after Brumado, next road towards Caetité] ” (14 ° 13 ’ 59.1 ’’ S 041 ° 54 ’ 18.2 ’’ W), 550 m., 27. ii. 2018, leg. C. J. Benetti et al. (2 females, INPA). Brazil: Minas Gerais State, Jequitaí County, “ Rio Jequitai na ponte [bridge], rock pools ”, (17 ° 14 ’ 03.9 ’’ S 044 ° 26 ’ 42.1 ’’ W), 490 m., 01. iii. 2018, leg. C. J. Benetti et al. (1 female, INPA).	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF99FFB948B8F8A04995FD8E.taxon	distribution	Distribution. From USA to Argentina, including the Caribbean islands (Perkins 1980; Deler-Hernández & Delgado 2012). The new records expand the distribution of this species in Brazil, to northern Amazonia and Central and East Brazilian Plateau.	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF9AFFB848B8F89D4C20FF66.taxon	description	Fig. 5	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF9AFFB848B8F89D4C20FF66.taxon	materials_examined	Brazil: Roraima State, Amajari County, “ Lago depois do Rio Ereu ” [lake close to Ereu river] (04 ° 02 ’ 18.5 ” N 61 ° 23 ’ 16.1 ” W), 173 m., 19 / iii / 2014, leg. C. J. Benetti (7 specimens) Brazil: Roraima State, Amajari County, “ RR 203, estrada para Tepequém ” [RR 203 road towards Tepequém] (03 ° 36 ’ 52.4 ’’ N 061 ° 33 ’ 28.2 ’’ W), 129 m., 13. i. 2018, leg. C. J. Benetti et al. (3 males, 10 females, INPA).	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
03A8878DFF9AFFB848B8F89D4C20FF66.taxon	distribution	Distribution. New Brazilian state record for a common species, widely distributed in northern South America: Colombia, Venezuela, Guyana, Bolivia, and northern and eastern Brazil (Perkins, 2011).	en	Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A., Hamada, Neusa (2021): Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera). Zootaxa 4966 (1): 61-68, DOI: https://doi.org/10.11646/zootaxa.4966.1.6
