This species is known only from the type locality, Puerto Eden, Wellington Island, Chile (49° 10'S; 74° 28'W). Its altitudinal range is up to 50m asl.
Habitat and Ecology
Its habitat is Magellanic tundra, with a mosaic of small patches of Nothofagus forest and bogs. Reproduction probably occurs in the bogs.
This species is known only from a single specimen collected more than 25 years ago.
This species is probably not threatened because the habitat on Wellington Island is not under any significant threats.
In Chile this species is listed as "Rare" (Reglamento de la Ley de Caza, Chile, 1998).
The generic assignment of this species needed to be revised as suggested by Lynch (1978) and Basso and Ubeda (1998). Subsequently this species was moved from Atelognathus to a new genus Chaltenobatrachus as it is a sister taxon based on molecular evidence (Basso et al. 2011).
Alberto Veloso, Herman Núñez 2010. Chaltenobatrachus grandisonae. In: IUCN 2013