In recent years, several species of Astyanax ZBK with similar counts of scales (33-36 on lateral line, 6-7/5-6 transverse) and anal fin-rays (iv-v + 21-23) to those of A. eigenmanniorum were described from eastern Brazil and northern Argentina (Almiron et al, 2002; Azpelicueta & Garcia, 2000; Azpelicueta et al. 2002a, 2002b, 2003; Casciotta et al., 2003; Casciotta & Almiron, 2004; Melo, 2001; Miquelarena et al., 2005; Miquelarena & Menni, 2005; Mirande et al., 2006). Several of these species, plus a few others, share the presence of gradually decreasing dentary teeth and variably expanded premaxillary teeth. This group of species is composed by A. giton Eigenmann ZBK and A. hastatus Myers ZBK from eastern Brazil, A. ojiara Azpelicueta & Garcia ZBK , A. troya Azpelicueta, Casciotta & Almiron ZBK , A. leonidas Azpelicueta, Casciotta & Almiron ZBK , A. pynandi Casciotta, Almiron, Bechara, Roux & Ruiz Diaz ZBK , A. ita Almiron, Azpelicueta & Casciotta ZBK from northeastern Argentina, and A. chico Casciotta & Almiron ZBK from northwestern Argentina. Additionally, all these species with the exceptions of A. hastatus ZBK and A. ita ZBK have hooks on anal, pelvic, pectoral, and/or dorsal, caudal fins.
The aim of this paper is to describe a new species from the endorheic RíoSalí basin, northwestern Argentina, which shares with the mentioned species the gradually decreasing dentary teeth and expanded premaxillary teeth.
The genus Astyanax ZBK is currently diagnosed by a combination of several broadly distributed features among Characidae, and there are no studies supporting neither its monophyly nor the monophyly of some species complex within the genus. We assign this new species to genus Astyanax ZBK following its traditional definition (Eigenmann, 1917), considering that the new taxon shares some presumably apomorphic character states with species also assigned to this genus.
- Juan Marcos Mirande, Gastón Aguilera, María de las Mercedes Azpelicueta (2007): A new species of Astyanax (Characiformes: Characidae) from the endorheic Río Salí basin, Tucumán, northwestern Argentina. Zootaxa 1646, 31-39: 31-32, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:D83848ED-9E15-4C2C-A228-0288B2CAFBB9
No one has provided updates yet.