This species is endemic to north-western Argentinean Patagonia, and has been recorded from a number of localities in Neuquen Province. The altitudinal range is from 1,000-1,500m asl.
Habitat and Ecology
It lives on the ground under stones and in humid ravines surrounding small-scattered lagoons, in volcanic tablelands, with steppe and semi-desert landscapes; it is presumed to breed in the lagoons. The species does not occur in modified habitats.
It is a rare species.
The main threat is the introduction of predatory fishes (perch and salmonids) in Laguna Blanca, but it is also threatened by the loss of pond side vegetation through overgrazing and trampling by livestock (sheep).
The species was previously protected in Parque Nacional Laguna Blanca; however, it is now extirpated in this park because of the introduction of predatory fishes and habitat loss. Three of the subspecies lack any protection, and habitat protection is urgently needed as are measures to prevent the future introduction of predatory fish species.
Red List Status
Listed as Endangered because of a serious population decline, estimated to be more than 50% over the last ten years, inferred from observed reduction in population size, and a decline in both the extent of occurrence and area of occupancy, following the impact of introduced predatory fishes on the major subpopulation of the species; and because its Extent of Occurrence is less than 5,000 km2, its distribution is severely fragmented, and there is continuing decline in the Extent of Occurrence, Area of Occupancy, and number of mature individuals.
The Atelognathus praebasalticus complex needs to be re-examined taxonomically. There are four known subspecies, some of which may constitute new species. Some of these subspecies may be extinct.
Carmen Úbeda, Néstor Basso, Esteban Lavilla, Boris Blotto 2004. Atelognathus praebasalticus. The IUCN Red List of Threatened Species 2004: e.T56324A11460271. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T56324A11460271.en .Downloaded on 14 November 2018