Animal Biodiversity and Conservation. Volume 37.2 (2014) Pages: 107-114

A new endemic species of Bryconamericus (Characiformes, Characidae) from the Middle Cauca River Basin, Colombia

Román-Valencia, C. (. D., Ruiz-C., R. I. D., Taphorn B., D. C., García-Alzate, C. A.

DOI: https://doi.org/10.32800/abc.2014.37.0107

Abstract

Bryconamericus caldasi, a new species, is described from the Middle Cauca River drainage, Andean versant of Colombia. The new species is distinguished from all congeners by: the number of predorsal scales (15–17 vs. 9–14); a wide anterior maxilla tooth, at least twice as wide as the posterior tooth, both of which are pentacuspid (vs. maxilla teeth of same size); a dark lateral stripe overlaid by a peduncular spot; and a reticulated pattern on the sides of body (vs. peduncular spot and other body pigments not superimposed over a dark lateral stripe). We found several differences that distinguish the new species from B. caucanus, the only sympatric congener: number of predorsal median scales (15–17 vs. 12–13); convex predorsal profile (vs. oblique); scale size and number of scale rows at caudal–fin base (small scales arranged in two or more rows vs. large scales in just one row); pectoral fins not or just reaching pelvic fin insertions (vs. pectoral fins reaching posterior to pelvic–fin insertions); and dorsal–fin origin position (at vertical through posterior tip of pelvic–fin vs. at a vertical anterior to pelvic–fin tip).

Keywords

Biodiversity, Taxonomy, Tropical Fish, New Taxon

Cite

Román-Valencia, C. (. D., Ruiz-C., R. I. D., Taphorn B., D. C., García-Alzate, C. A., 2014. A new endemic species of Bryconamericus (Characiformes, Characidae) from the Middle Cauca River Basin, Colombia. Animal Biodiversity and Conservation, 37: 107-114, DOI: https://doi.org/10.32800/abc.2014.37.0107

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Reception date:

25/02/2014

Acceptation date:

23/05/2014

Publication date:

12/12/2014

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