Peces Criollos - Freshwater Fishes of Argentina Peces Criollos - Freshwater Fishes of Argentina
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Gymnocharacinus bergii - recent papers

Gymnocharacinus bergii, photo: Heiko Bleher

The scaleless characid Gymnocharacinus bergii Steindachner, 1903 is a stenothermic teleost fish restricted to the headwaters of the Valcheta stream at the Somuncurá plateau in the Argentinean province
of Río Negro. This species is highly threatened by salmonids (Oncorhynchus mykiss and Salvelinus fontinalis) introduced into its natural environment in 1941 and human activities such as channel drainages and cattle breeding.
Due to its unique position within the Characiformes, its endemic occurence and restricted distribution far south in a thermal stream of northern temperate Patagonia this species was studied or at least mentioned by numerous native and foreign investigators during the years. Unfortunately, publications about this remarkable teleost are widely dispersed in journals and in languages often little known to researchers. 

ICP 61 - Koerber (2019) Literature update on Gymnocharacinus bergii [3 MB]
Koerber & Ortubay (2004): Literature published on Gymnocharacinus bergii [129 KB]
Hypostomus roseopunctatus - first record from Argentina

Megaleporinus piavussu - first record from Argentina

Corydoras longipinnis - first record from Uruguay

Hoplias argentinensis - first record from Uruguay

Odontesthes argentinensis - first record from freshwaters in Argentina

Oligosarcus pintoi - first record from Argentina

Moenkhausia bonita - first record from Paraguay

Potamoglanis johnsoni comb.nov. from Trichomycterus

Schizodon altoparanae - first record from Paraguay

Pinirampus argentina comb.nov. from Megalonema

Farlowella azpelicuetae sp.nov. from Argentina

Jenynsia sulfurica sp.nov. from Argentina

Zungaro jahu - Paulicea gigantea is a jr. synonym

CLOFFAR - update 6

Steindachnerina nigrotaenia - resurrected from synonymy of S. brevipinna

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