Retroculus acherontos, a new species of cichlid fish (Teleostei) from the Rio Tocantins basin

被引:1
作者
Landim, Maria Isabel [1 ]
Moreira, Cristiano R. [2 ]
Figueiredo, Carlos A. [3 ]
机构
[1] Univ Sao Paulo, Museu Zool, BR-04218970 Sao Paulo, SP, Brazil
[2] Univ Fed Rio de Janeiro, Museu Nacl, Setor Ictiol, Dept Vertebrados, BR-20940040 Rio De Janeiro, RJ, Brazil
[3] Univ Fed Estado Rio de Janeiro, Inst Biociencias, Dept Ciencias Ambiente, BR-22290240 Rio De Janeiro, RJ, Brazil
基金
巴西圣保罗研究基金会;
关键词
taxonomy; Cichlinae; rheophily; Neotropical; PHYLOGENETIC SIGNIFICANCE; MORPHOLOGY; PERCIFORMES; EVOLUTION; GENUS;
D O I
10.11646/zootaxa.3973.2.10
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Retroculus acherontos is described from the Rio Tocantins basin, Brazil. It is distinguished from all congeners by the presence of a nuchal hump in large specimens, an irregular black blotch located on the middle of the anterior soft dorsal-fin rays, fewer pectoral-fin rays (15-16), a deeper body, a convex ventral profile, a more transversely convex ventral surface of the body, and by chest scales similar in size to the scales on the side. An expanded diagnosis for the genus Retroculus is provided.
引用
收藏
页码:369 / 380
页数:12
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