A new species of Characidium (Characiformes: Crenuchidae) from the Iguacu National Park, Rio Iguacu basin, Parana, Brazil.

ABSTRACT: A new species of Characidium is described from the Iguaçu National Park, Brazil. The new species can be diagnosed from the congeners by the absence of conspicuous vertical bars, blotches and spots along the sides of the body, the presence of a scaled isthmus and adipose fin, a series of scales below lateral line and the presence of a thin dark midlateral stripe. The reticulated colour pattern of melanophores along the posterior edge of scales found in the new species is similar to that found in C. xanthopterum, with which it presents 4.2% of genetic distance. Morphological and molecular analyses showed that it is a new species, supported by multiple species delimitation methods (Assemble Species by Automatic Partitioning, the General Mixed Yule Coalescent method, and the Poisson Tree Proce

SUBMITTER: Stabile BHM 

PROVIDER: S-EPMC12360132 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature