Osornophryne, genero nuevo de anfibios bufonidos de Colombia y Ecuador

A brief abridgement of the taxonomic history of the "Atelopodidae" is presented, and it is concluded that this group must be included in the Bufonidae, confirming the criteria of recent authors. OSORNOPHRYNE is proposed as a new genus, characterized mainly by external, osteologicaland myological features, with O. percrassa, sp, nov. (loc. typ.: Páramo de Herveo, Tolima, Colombia) as type species, and O. bufoniformis, comb. nov. (= Atelopus bufoniformis PERACCA,1904) from the Andes of southern Colombia and northern Ecuador, as a referred species. The functional and adaptative significance of the main characters is discussed indetail. It is concluded that the genus presents several primitive characters of remarkable interest, i.a. the inguinal amplexus, previously unknownin the family, which strengthens the thesis that the Bufonidae are derived from the Leptodactylidae, as well as several other highly especialized skeletal and myological features (i. a . a total number of 6 presacral vertebrae, only  shared by two other recent anuran genera: Hymenochirus [Pipidae] and Oreophrynella [Bufonidae]). It is concluded also thatOsornophryne, although shows several remarkable phenetic similitudes with Oreophrynella (monotypic endemic genus of the Mount Roraima, Bolivar, Venezuela), such similitudes are due to an extraordinary instance of evolutionary convergence. Osornophryne is regarded as a genus probablyderived from the same encestral phyletic line that gives origin to Atelopus, invading the high Andean "páramos", specializing and acquiring by adaptative paralellism several resemblances, such as the "bufonoid" aspect, with the high Andean species of Atelopus.

Bibliographic Details

Main Authors:	Ruíz Carranza, Pedro M., Hernández Camacho, Jorge I.
Format:	Digital revista
Language:	spa
Published:	Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Instituto de Ciencias Naturales 1976
Online Access:	https://revistas.unal.edu.co/index.php/cal/article/view/34333
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