Shop » Scientific Journal » aqua 22(3) » 22-3_A new species of Hemigrammus Gill 1858…
Hemigrammus-aguaruna

22-3_A new species of Hemigrammus Gill 1858…

10.00

SINGLE PAPER

Volume 22, Issue 3 – 15 July 2016

Flávio C. T. Lima, Vanessa Correa and Rafaela P. Ota: A new species of Hemigrammus Gill 1858 (Characiformes: Characidae) from the western Amazon basin in Peru and Colombia, pp. 123-132

Category:

Product Description

SINGLE PAPER

Volume 22, Issue 3 – 15 July 2016

Flávio C. T. Lima, Vanessa Correa and Rafaela P. Ota: A new species of Hemigrammus Gill 1858 (Characiformes: Characidae) from the western Amazon basin in Peru and Colombia, pp. 123-132

Abstract
Hemigrammus aguaruna, new species, is described from tributaries of the Río Maranõn, Departamento Loreto, Peru, and is also recorded from Leticia, Departamento Amazonas, Colombia. The new species belongs to the Hemigrammus ocellifer species group, sharing with the remaining species of the group the presence of two humeral blotches, a caudal peduncle blotch, the upper margin of the eye red in living specimens, and the presence in adult males of a single midlle-sized hook on the last unbranched and anteriormost branched anal-fin rays. Hemigrammus aguaruna can be readily distinguished from the remaining congeners of the Hemigrammus ocellifer species group, with exception of H. yinyang, by presenting a very  conspicuous, intensely dark, roughly oval, horizontally elongated second blotch (vs. second humeral blotch less developed than the first humeral blotch, vertically elongated and very narrow). Comments on the recent revalidation of Hemigrammus falsus are presented.