Living in the waterfalls: A new species of Trichomycterus (Siluriformes: Trichomycteridae) from Tabay stream, Misiones, Argentina

作者：Enrique Teran Guillermo; Ferrer Juliano; Benitez Mauricio; Alonso Felipe; Aguilera Gaston^*; Marcos Mirande Juan

来源：PLos One, 2017, 12(6): e0179594.

DOI：10.1371/journal.pone.0179594

A new species assigned to the genus Trichomycterus from the area of the waterfalls of Tabay stream, Parana A River basin, Misiones, Argentina, is described. Trichomycterus ytororo sp. nov. is distinguished from all other species in the genus by the presence of 31-35 dorsal procurrent caudal-fin rays and the combination of some external characters such as: coloration, number of pectoral-fin rays and pores of the laterosensory canals. The new taxon belongs to a presumably monophyletic group of species composed of T. crassicaudatus, T. igobi, and T. stawiarski based on the presence of 24 or more thickly ossified and rigid procurrent caudal-fin rays with a slender distal tip extending along the tips of at least ten neural spines.

• 出版日期2017-6-22