Abstract

Congo River basin catfishes previously identified as Doumea alula (Amphiliidae, Doumeinae) were found to include three species that belong not to the genus Doumea but are, instead, the sister-group to a clade formed by all remaining Doumeinae. The species are assigned to a new genus, Congoglanis. Characters delimiting the Doumeinae and the clade consisting of all members of the subfamily except Congoglanis are detailed. Congoglanis alula is distributed throughout much of the Congo River basin; C. inga, new species, is known only from the lower Congo River in the vicinity of Inga Rapids; and C. sagitta, new species, occurs in the Lualaba River basin of Zambia in the southeastern portion of the Congo River system.

Abstract

A new species of the deep-sea ceratioid anglerfish genus Himantolophus, long hidden within material identified as H. appelii Clarke, 1878, is described based on 43 female specimens collected in southern waters of all three major oceans of the world. A member of the H. appelii group, it differs from its sister-species, H. appelii, the only other member of the group, in details of escal morphology. The two species are geographically sympatric over much of their range.

Abstract

Etsaputu relictum, a new genus and species sister to all other Ancistrini, is described from the upper Marañon River in Northern Peru. Etsaputu relictum can be diagnosed from all other Hypostominae by having a coracoid with a serrated posterior margin of the posterior process, an opercle with a process extending ventrolaterally from the ventral margin, and branchiostegals one and two fused. Etsaputu relictum is further distinguished by having cheek plates evertible to less than 45° from the sagittal plane, by having fewer than ten (typically zero or six) enlarged cheek-plate odontodes, by having enlarged cheek-plate odontodes straight and no longer than 15 times length of odontodes on lateral body plates, by having large eyes (mean 24.0% of head length, range 21.7–27.6% HL), and by having uniformly gold-brown to bronze base color with golden sheen when alive.

NEW NAMES

Congoglanis 477–489

inga 477–489

sagitta 477–489

Creteuchiloglanis 226–241

brachypterus 226–241

longipectoralis 226–241

Etmopterus sculptus 379–384

Etsaputu 497, 499

relictum 497–502

Gymnorhamphichthys britskii 400–406

Gymnotus tiquie 77–81

Hemigrammus diagonicus 211–215

Himantolophus stewarti 490–493, 495–496

Micracanthicus 216–225

vandragti 216–225

Neocaristius 385–399

Paracaristius

aquilus 385–399

nemorosus 385–399

nudarcus 385–399

Paulasquama 46–52, 222

callis 46–52, 216, 221, 224

Photonectes 201–210

barnetti 201–210

coffea 201–210

corynodes 201–210

Poecilia hondurensis 418–422

Scorpiodoras