Open AccessRediscovering species: redescription of Bryconops gracilis (Characiformes: Iguanodectidae), an often-misidentified species
Author(s) -
Cárlison SilvaOliveira,
Rafaela Priscila Ota,
Flávio C. T. Lima,
Lúcia Helena Rapp PyDaniel
Publication year - 2021
Publication title -
neotropical ichthyology/neotropical ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 40
eISSN - 1982-0224
pISSN - 1679-6225
DOI - 10.1590/1982-0224-2021-0054
Subject(s) - biology , characiformes , holotype , zoology , type locality , anatomy , taxonomy (biology) , fishery , fish <actinopterygii>
A redescription of Bryconops gracilis is provided, a species poorly known for more than a century. Bryconops gracilis differs from all congeners by having the following combination of features: eight branched pelvic-fin rays, 31-36 anal-fin rays, 15-17 predorsal scales arranged in a regular series, two rows of premaxillary teeth, and 53-60 lateral-line scales. The species was often misidentified as B. alburnoides by sharing an overall elongated body shape, caudal fin yellowish in life, and a high number of lateral-line scales. A diagnosis between B. alburnoides and B. gracilis is provided. The holotype of B. gracilis which for many years had whereabouts unknown, was recovered, examined and illustrated by CT-Scan. Additionally, more detailed information about the type locality, morphology, color pattern (including in living specimens), habitat and distribution pattern of species are provided.