The Patagonian Telmatobiid Fauna of the Volcanic Somuncura Plateau of Argentina

The Late Tertiary basaltic rocks of the Patagonian Meseta of Somuncura, Rio Negro, Argentina, extend for about 15,000 square km north of 42° South Latitude, approximately 60 miles from the Atlantic coast. It is a flat stepparian landscape of some 1200-1400 m elevation in which many temporary clay-la...

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Autor principal: Cei, José Miguel Alfredo María
Formato: Articulo
Lenguaje:Inglés
Publicado: 1969
Materias:
Zoología
Telmatobiid Fauna
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/88586
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-88586
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Telmatobiid Fauna
Argentina
spellingShingle Zoología
Telmatobiid Fauna
Argentina
Cei, José Miguel Alfredo María
The Patagonian Telmatobiid Fauna of the Volcanic Somuncura Plateau of Argentina
topic_facet Zoología
Telmatobiid Fauna
Argentina
description The Late Tertiary basaltic rocks of the Patagonian Meseta of Somuncura, Rio Negro, Argentina, extend for about 15,000 square km north of 42° South Latitude, approximately 60 miles from the Atlantic coast. It is a flat stepparian landscape of some 1200-1400 m elevation in which many temporary clay-lagoons are scattered. Small rocky streams filter from the basaltic uplands towards the lower slopes of the Meseta, about 700-500 m. The fauna of such an isolated environment is very peculiar and a high rate of endemic forms can be emphasized. Two new species of telmatobiid frogs are reported: <i>Telmatobius reverberii</i> from the clay-lagoons of the stepparian uplands, and <i>Telmatobius somuncurensis</i> from the lower rocky streams. Adults and tadpoles of <i>Telmatobius reverberii</i> are described; this form has morphological and ecological affinities with the smaller <i>Telmatobius praebasalticus</i> of the volcanic lagoons of Neuquen, near the Southern Argentine Cordilleras. Certain characteristics of <i>Telmatobius somuncurensis</i> are discussed, such as the uncommon everted cloaca and the similarity between the upper and lower rounded structures of its iris and the upper "meniscus” of the iris of the east-Brazilian Cyclorhamphus. Probable biogeographic relationships and a tentative evolutionary history of these ancient leptodactylid stocks are discussed.
format Articulo
Articulo
author Cei, José Miguel Alfredo María
author_facet Cei, José Miguel Alfredo María
author_sort Cei, José Miguel Alfredo María
title The Patagonian Telmatobiid Fauna of the Volcanic Somuncura Plateau of Argentina
title_short The Patagonian Telmatobiid Fauna of the Volcanic Somuncura Plateau of Argentina
title_full The Patagonian Telmatobiid Fauna of the Volcanic Somuncura Plateau of Argentina
title_fullStr The Patagonian Telmatobiid Fauna of the Volcanic Somuncura Plateau of Argentina
title_full_unstemmed The Patagonian Telmatobiid Fauna of the Volcanic Somuncura Plateau of Argentina
title_sort patagonian telmatobiid fauna of the volcanic somuncura plateau of argentina
publishDate 1969
url http://sedici.unlp.edu.ar/handle/10915/88586
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