A new species of Astyanax (Ostariophysi: Characidae) from the headwaters of the arheic Río Sucuma, Catamarca, Northwestern Argentina

This dataset contains the digitized treatments in Plazi based on the original journal article Terán, Guillermo E., Butí, Cristina I., Mirande, J. Marcos (2017): A new species of Astyanax (Ostariophysi: Characidae) from the headwaters of the arheic Río Sucuma, Catamarca, Northwestern Argentina. Neotropical Ichthyology 15 (2), No. e 160165: 1-10, DOI: 10.1590/1982-0224-20160165, URL: dx.doi.org/10.1590/1982-0224-20160165 A new species of Astyanax is described from the arheic system of Río Sucuma, in Catamarca, Northwestern Argentina.

The new species is distinguished from its congeners by a combination of characters including the presence of a broad vertical humeral spot, absence of maxillary teeth, and absence of circuli in posterior field of scales. Furthermore, this species is distinguished by the orbital diameter, head length, branched anal-fin rays, perforated lateral-line scales, transverse scales, dentary teeth with abrupt decrease in size. This species is, to date, the single known fish endemic of Río Sucuma basin.