New species of the corumbataia cuestae group (Siluriformes: Loricariidae) from the rio tocantins basin, with comments on its phylogenetic relationships

2Citations
Citations of this article
9Readers
Mendeley users who have this article in their library.
Get full text

Abstract

A new species of Corumbataia is described from Rio Maranhão, Rio Tocantins basin, central Brazil. The new species is distinguished from all congeners by the presence of a small, naked area on snout tip; by having the abdomen covered with small platelets forming a shield which reaches the lateral mid-ventral plates; by the anterior profile of the head rounded in dorsal view; by the lower lip not reaching the transversal line of the pectoral girdle; and by the presence of 28 or 29 vertebrae. High genetic divergence in mitochondrial cytochrome c oxidase subunit I (COI) further supports the validity of this new species. Our phylogenetic analysis shows a derived subclade in Corumbataia, herein named as the Corumbataia cuestae group, composed of the new species plus C. cuestae, C. tocantinensis, C. britskii, C. liliai, and C. lucianoi. This group is defined by having a conspicuous crest of hypertrophied odontodes on head; absence of the adipose fin or a single series of platelets at adipose-fin position; and anastomosis of the infraorbital and otic sensory canals over the pterotic-supracleithrum. Here we also restrict the distribution of C. tocantinensis to the Rio Araguaia basin.

Cite

CITATION STYLE

APA

Thimotheo, M. G. R., Benine, R. C., Oliveira, C., & E Silva, G. de S. da C. (2020). New species of the corumbataia cuestae group (Siluriformes: Loricariidae) from the rio tocantins basin, with comments on its phylogenetic relationships. Neotropical Ichthyology, 18(4), 1–16. https://doi.org/10.1590/1982-0224-2020-0060

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free