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A new species of miniature Characidium (Characiformes: Crenuchidae) from the upper Rio Paraguay basin, Mato Grosso state, Brazil
Author(s) -
Graça Weferson J.,
Ota Renata R.,
Domingues Wladimir M.
Publication year - 2019
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.14169
Subject(s) - characiformes , biology , structural basin , zoology , ecology , paleontology , fishery , fish <actinopterygii>
Abstract A new miniature species of Characidium is described from the upper Rio Paraguay basin, Brazil. The new species can be diagnosed from all congeners by the presence of a dark‐brown humeral blotch, vertically elongated (spanning 5 to 7 horizontal scale rows), with the shape of an upside‐down acute triangle. Additionally, it can be diagnosed by a short lateral line (6 to 8 perforated scales), the absence of a conspicuous peduncular blotch, a lower number of principal caudal‐fin rays (14–16) and by absence of the adipose fin. The new species is the smallest species of the genus; the largest specimen was 19.3 mm standard length.