Peces Criollos - Freshwater Fishes of Argentina Peces Criollos - Freshwater Fishes of Argentina
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Otocinclus flexilis is not a species from Argentina

distribution of Otocinclus arnoldi + Otocinclus flexilis
Geographic distribution of Otocinclus arnoldi (red squares) and O. flexilis (black dots).
(modified map from publication)

Not a species from Argentina:
Otocinclus flexilis Cope,1894

remarks:
Lehmann (2006) limits the distribution of Otocinclus flexilis to tributaries of the Patos lagoon system and resurrects O. arnoldi from the synonymy with O. flexilis. Records of Otocinclus flexilis from Argentina are now to be considered Otocinclus arnoldi.

abstract (from publication):
Otocinclus arnoldi from the La Plata basin is resurrected from the synonymy of O. flexilis described from rio Jacuí basin, based on two diagnostic characters: the presence of five branched pectoral-fin rays vs six in O. flexilis, and the presence of the raised tuft of enlarged odontodes at the tip of the supraoccipital posterior process, in juvenile as well as in adults of O. arnoldi...

distribution (from publication):
Otocinclus flexilis is restricted to the laguna dos Patos drainage basin.

published in:
Lehmann, P. (2006): Anatomia e relações filogenéticas da família Loricariidae (Ostariophysi: Siluriformes) com ênfase na subfamília Hypoptopomatinae. Tese de doutorado. PUCRS, Porto Alegre, Brazil. ix + 420 p.
Usage of unpublished data authorized by Roberto Reis.

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

Cambeva mboycy comb.nov. from Trichomycterus

Cambeva davisi comb.nov. from Trichomycterus

Cambeva stawiarski comb.nov. from Trichomycterus

Cambeva ytororo comb.nov. from Trichomycterus

Geophagus sveni - first record from Argentina

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