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The true identity of Bryconops cyrtogaster ( Norman ), and description of a new species of Bryconops Kner ( Characiformes: Iguanodectidae ) from the Rio Jari , lower Amazon basin
Author(s) -
SilvaOliveira Cárlison,
Moreira Cristiano R.,
Lima Flávio C. T.,
PyDaniel Lúcia Rapp
Publication year - 2020
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.14445
Subject(s) - biology , subgenus , meristics , characiformes , zoology , amazon basin , ecology , amazon rainforest , taxonomy (biology) , fishery , fish <actinopterygii>
Bryconops cyrtogaster , a poorly known species endemic from the Oyapock River at the border between French Guyana and Brazil, is redescribed herein based on examination of available type material, as well as newly collected material. Additionally, a new rheophilic species from the rio Jari rapids, lower Amazon basin, Brazil, is described. The two species belong to the subgenus Creatochanes and are unique among the congeneres for possessing a posteriorly positioned humeral blotch at the level of the sixth and seventh lateral line scales. They differ from each other by meristic and morphometric characters. The list of endemic species in the rio Jari basin is revised.