The Portezuelo frog or Rio Negro frog (''Atelognathus nitoi'') is a species of

frog A frog is any member of a diverse and largely semiaquatic group of short-bodied, tailless amphibian vertebrates composing the order (biology), order Anura (coming from the Ancient Greek , literally 'without tail'). Frog species with rough ski ...

in the family

Batrachylidae Batrachylidae is a Family (biology), family of frogs from southern South America (Argentina and Chile). Before being recognized as a family, Batrachylidae was included as a subfamily (Batrachylinae) in the family Ceratophryidae; this is the taxon ...

. It is endemic to Chile and Argentina.

Habitat

This frog lives in ''Nothofagus'' forests near temporary and permanent ponds and areas with high humidity. Scientists observed this frog between 1300 and 1550 meters above sea level. The frog has been found in Parque Nacional Nahuel Huapi and in Laguna Verde National Park.

Reproduction

The female frog lays 50 to 300 eggs at a time.

Threats

The IUCN classifies this frog as vulnerable to extinction. Threats include fires, human-made and otherwise, tourism, and possibly horses and cows grazing near the ponds.

References

nitoi Amphibians of Argentina Amphibians of Chile Taxonomy articles created by Polbot Amphibians described in 1973 {{hyloidea-stub