Heptopteridae) of the superior Xingu river basin

Abstract

Impartfinis It is a genus of small cats with 21 valid species widely distributed in the main river basins of the neotropical region. Here, A new species of Impartfinis It is described from the headwaters of the Xingu River. The new species is distinguished from its peers by the presence of a wide dark strip from the tip of the snout to the flow peduncle that contrasts a bit low and aligned with the dark strip centered on the dorsal portion of the lobe of the lower flow wing, 11–12 crisp vertical, a mayor of Barbelas Máximas overrained-pink, and a mafinic barbalera of the maximum chin. Short and flexible extension of the rays of flow, dorsal and previous seniors. In addition, assembly species through automatic analysis (ASAP) and the analysis of the Poisson Tree (BPPP) processes model support the validity of this new species. Our molecular phylogenesis based on the subunit of cytochrome c oxidase 1 mitochondrial gen (IOC) corroborates the placement of the new species in Impartfinis And his close relationship with I. Guttatus. Delimitation of species in Impartfinis It is discussed.

Arceae Left column: Holotype, MCP 55325, 47.9 mm SL. Right column: Ansp 187252, from top to bottom: 50.5 mm SL; 43.9 mm SL; 40.6 mm sl; 36.9 mm SL.

ArceaeNew species

Etymology.-The specific name, Arceaehonor Dr. Mariangeles Arce HernándezExecutive Director of the Center for Biology and Systematic Evolution of the Academy of Natural Sciences of the University of Drexel, for its valuable contributions to the studies of the systematic and the evolution of the Gowers. A genitive noun.

Gabriel de Souza da Costa E Silva, Mark Henry Sabaj, Kaylane Rodrigues de Carvalho and Claudio Oliveira. 2025. Integrative taxonomy reveals a new species of oddfinis (siluriform: heptopteridae) of the upper xingu river basin. Ichthyology & Herpetology. 113 (1); 143-153. DOI: doi.org/10.1643/i2023097 (April 3, 2025)