Peces Criollos - Freshwater Fishes of Argentina Peces Criollos - Freshwater Fishes of Argentina
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Oligosarcus itau sp.nov.

Oligosarcus itau holotype
Oligosarcus itau, holotype (from publication)

new species from Argentina:
Oligosarcus itau Mirande, Aguilera & Azpelicueta, 2011

distribution and habitat (from publication):
Oligosarcus itau is only known from an unnamed stream in the road to Campo Largo, General San Martín, Salta, Argentina; this stream is an affluent of the Río Itau, Río Bermejo basin.

published in:
Mirande, J.M., G. Aguilera & M. Azpelicueta (2001):
A threatened new species of Oligosarcus and its phylogenetic relationships, with comments on Astyanacinus (Teleostei: Characidae).
Zootaxa 2994: 1-20

abstract (from publication):
Oligosarcus itau n. sp. is described. This species is the sister group of the remaining analyzed species of Oligosarcus and this relationship is supported by seven morphological synapomorphies: 1) well developed temporal fossa, 2) absence of a dorsal expansion on the rhinosphenoid, 3) posteroventrally angled articulation between second and third infraorbitals, 4) presence of ectopterygoid teeth on a row, 5) laterally displaced cartilage on the ectopterygoid, 6) presence of bony lamellae bordering laterosensory canal of suprapreopercle, and 7) presence of two pairs of uroneurals. The new species is diagnosed by the following combination of characters: 1) two distinct premaxillary rows of teeth, 2) tricuspidate and pentacuspidate teeth on dentary and posterior premaxillary row, 3) presence of a row of 3–4 tricuspidate to conical ectopterygoid teeth, 4) possession of v-vi,21–23 anal-fin rays, and 5) presence of 41–42 perforated scales on lateral line. Oligosarcus itau n. sp. was previously considered as an Astyanacinus. Astyanacinus moorii (Boulenger), type species of the genus, is included in the Astyanax clade and Astyanacinus platensis Messner is transferred to Oligosarcus.
 

CLOFFAR - update 6

Steindachnerina nigrotaenia - resurrected from synonymy of S. brevipinna

Steindachnerina insculpta - not a species from Argentina

Hypostomus cordovae revalidated from synonymy with H. paranensis

Hypostomus spiniger revalidated from synonymy with H. commersoni

Moenkhausia bonita - first record from Argentina

Moenkhausia intermedia - not a species from Argentina

Hisonotus pantherinus - comb.nov. from Eurycheilichthys

Pyxiloricaria menezesi - not a species from Argentina

Gymnogeophagus jaryi sp.nov. from Argentina

Corydoras undulatus - first record from Paraguay

Austrolebias cinereus is a sr. synonym of A. vazferreirai

Gymnogeophagus peliochelynion sp.nov. from Uruguay

Diapoma nandi sp.nov. from Argentina

Austrolebias queguay sp.nov. from Uruguay

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