Oligosarcus jacuiensis (Characiformes: Characidae), a new species from the Uruguay and Jacuí River basins, southern Brazil

This dataset contains the digitized treatments in Plazi based on the original journal article Menezes, Naércio Aquino, Ribeiro, Alexandre Cunha (2010): Oligosarcus jacuiensis (Characiformes: Characidae), a new species from the Uruguay and Jacuí River basins, southern Brazil. Neotropical Ichthyology 8 (3): 649-653, DOI: 10.1590/S1679-62252010000300010, URL: scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000300010&lng=en&tlng=en The new species herein described, collected in the Jacuí and Uruguay River basins, Rio Grande do Sul, Brazil, can be distinguished from the already known species of the genus, but Oligosarcus jenynsii, O. perdido, O. acutirostris, O. solitarius and O. hepsetus, by the number of perforated lateral line scales.

It shares with the first two species the absence of a premaxillary foramen, present in the last three species and differs from O. jenynsii by having a smaller orbital diameter and the tip of the pectoral fin failing to reach the pelvic-fin origin, and from O. perdido by the presence of more horizontal scale rows around the caudal peduncle. A espécie nova descrita aqui, coletada nas bacias dos rios Jacuí e Uruguai, Rio Grande do Sul, Brasil, pode ser diferenciada das espécies já conhecidas do gênero, com exceção de Oligosarcus jenynsii, O. perdido, O. acutirostris, O. solitarius e O. hepsetus, pelo número de escamas perfuradas ao longo da linha lateral.