A new species of Hemigrammus (Characiformes: Characidae) from western Amazon River basin, Colombia

JUAN G. ALBORNOZ-GARZÓN; ALEJANDRO MÉNDEZ-LÓPEZ; CARLOS DONASCIMIENTO; FLÁVIO C. T. LIMA

Journal of Fish Biology

Blackwell Publishing Ltd

Lugar: Londres; Año: 2019 vol. 95 p. 932 - 939

A new species of Hemigrammus is described from the Amazon Basin near Leticia,Departamento Amazonas, Colombia. In common with some congeners and someHyphessobrycon spp., the new species colour pattern lacks a humeral blotch but has acaudal-peduncle blotch. It can be distinguished from congeners with a similar colourpattern by having: a relatively deep body (30.2%?39.0% LS), 20?24 branched anal-finrays, 6?8 perforated scales of the lateral line, anal-fin base without a conspicuousblack stripe, 3?5 maxillary teeth, maxillary teeth with 1?3 cusps, a thin longitudinalmidlateral line and a well-defined oval shaped caudal blotch, extending from caudalpeduncle into the lower caudal-fin rays. Comparisons with congeners and withHyphessobrycon species sharing the same general colour pattern are presented.