Brachyhypopomus verdii

distribution

Distribution: Tributaries of Marañon and Ucayali rivers, upper Amazon basin, Peru (Crampton et al., 2016 b).

Checklist of Gymnotiformes (Osteichthyes: Ostariophysi) and catalogue of primary types

biology_ecology

Ecological notes. Known only from low-conductivity blackwater terra firme rainforest streams and swamps, where it is found in association with submerged roots and leaf litter. See description of B. benjamini for water quality parameters of the area of the type locality. Breeding occurs during the rainy season in the area of the type locality (approximately December to April) (JCW unpublished data). Stomach contents of specimens from the type locality comprise small aquatic invertebrates (JCW unpublished data). Co-occurring congeners: In the region of the type locality in the lower río Ucayali, B. verdii occurs in sympatry and syntopy with B. beebei, B. benjamini, B. brevirostris, B. sullivani, and B. walteri. It exhibits an allotopic distribution to B. bennetti, B. flavipomus, B. hamiltoni, and B. regani.

A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new species

description

Description. Head and body shape, and pigmentation illustrated in Fig. 45. Meristic and morphometric data for examined specimens presented in Tables 2 - 5 and 20. Body shallow in depth. Head short and shallow to moderate in depth. Dorsal profile of head convex from occiput to snout, ventral profile of head convex between operculum and snout, snout rounded. Eye small to moderate in size. Upper jaw with moderate sigmoidal angle between premaxillary and maxillary portions in lateral view. Accessory electric organ (AEO) over operculum absent. Gill filaments on first gill arch 35 - 40 (median 37, n = 6). Pectoral fin narrow to moderate, pectoral-fin rays 13 - 17 (mode 15). Precaudal vertebrae 24 - 26 (mode 25), with 1 - 2 (mode 2) transitional vertebrae. Anal-fin origin slightly (<0.25 HL distance) posterior to tip of pectoral fin. Anal-fin rays 194 - 225 (median 208). Dorsal rami of recurrent branch of anterior lateral line nerve not visible. Middorsal region of body scaled. Rows of scales above lateral line 5 - 6 (mode 5). Lateral line continuous. Sparse groove-like depigmented epidermal canals – as parallel crisscrossing lines either side of lateral line (mainly in posterior third of

A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new species

description

urn: lsid: zoobank. org: act: 3 FC 61943 - 7 A 01 - 40 A 4 - A 5 D 6 - C 7 E 296167 CE 0 (Fig. 45; Tables 2 - 5, 20) Brachyhypopomus pinnicaudatus. - Chang & Ortega, 1995: 3, (Peru, catalog of fishes).

A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new species