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New Ecuadorian records of the eyeless banjo catfish Micromyzon akamai ( Siluriformes: Aspredinidae ) expand the species range and reveal intraspecific morphological variation
Author(s) -
Chuctaya Junior,
Encalada Andrea C.,
Barragán Karla S.,
Torres Maria L.,
Rojas Karla E.,
OchoaHerrera Valeria,
Carvalho Tiago P.
Publication year - 2021
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.14630
Subject(s) - biology , amazon rainforest , phylogenetic tree , catfish , zoology , range (aeronautics) , tributary , intraspecific competition , evolutionary biology , ecology , fish <actinopterygii> , gene , genetics , fishery , geography , cartography , materials science , composite material
Two specimens of Micromyzon akamai , an eyeless and miniaturized species previously known only from the deep channels of the eastern Amazon basin in Brazil, are reported from the Curaray River, a tributary of the Napo River in Ecuador. The new specimens are the first records of Micromyzon in the headwaters of the Amazon River and the first records of M. akamai outside Brazil. External morphological characters and a phylogenetic analysis of cytochrome c oxidase I ( coI ) gene support the identification of the new specimens as M. akamai . Nevertheless, the new specimens also indicate that some features previously hypothesized to be apomorphic for M. akamai are intraspecifically variable.