Tuesday, July 26, 2016

[Ichthyology • 2016] Tometes kranponhah & T. ancylorhynchus • Two New Phytophagous Serrasalmids (Characiformes: Serrasalmidae), and the First Tometes species described from the Brazilian Shield

Tometes kranponhah T.  ancylorhynchus 

Andrade, Jégu & Giarrizzo, 2016   



Two new species of Tometes from the Brazilian Shield rapids are described. Tometes kranponhah is endemic to the Xingu River basin, whereas Tometes ancylorhynchus occurs both in the Xingu and the Tocantins–Araguaia River basins. The two species are sympatric in the Xingu drainages and have many similarities in morphology and colouration. Major diagnostic differences are the dark pigmentation on the opercle of T. kranponhah and its distinct snout shape and arrangement of premaxillary teeth. In addition, T. kranponhah is a large fish that is abundant in the Xingu River, whereas T. ancylorhynchus is a medium-sized fish for which there are few records.

M. C. Andrade, M. Jégu and T. Giarrizzo. 2016. Tometes kranponhah and Tometes ancylorhynchus (Characiformes: Serrasalmidae), Two New Phytophagous Serrasalmids, and the First Tometes species described from the Brazilian Shield. Journal of Fish Biology. 89; 467–494. DOI:   10.1111/jfb.12868