A new species of Moenkhausia Eigenmann, 1903 (Characiformes, Characidae) from the rio Amazonas basin, Brazil

Zootaxa. 2016 Mar 24;4093(4):566-74. doi: 10.11646/zootaxa.4093.4.8.

Abstract

Moenkhausia abyss is herein described from the rio Amazonas basin lowlands. The new species can be distinguished from the congeners by presenting the combination of the following characters: a dark blotch located on the upper caudal-fin lobe and the lower lobe hyaline, 25-29 branched anal-fin rays, humeral spot rectangular, vertically oriented, extending horizontally through two or two and a half scales and located over the third to the fifth lateral line scales, five longitudinal scale rows above the lateral line, predorsal scales arranged in a single not interrupted median row and 30-34 perforated lateral line scales. Brief comments on Moenkhausia megalops are provided.

MeSH terms

  • Animal Distribution
  • Animal Structures / anatomy & histology
  • Animal Structures / growth & development
  • Animals
  • Body Size
  • Brazil
  • Characidae / anatomy & histology
  • Characidae / classification*
  • Characidae / growth & development
  • Ecosystem
  • Female
  • Male
  • Organ Size