Artículo
The anatomy of the upper cretaceous snake najash rionegrina apesteguía & Zaher, 2006, and the evolution of limblessness in snakes
Fecha de publicación:
08/2009
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Zoological Journal of the Linnean Society
ISSN:
0024-4082
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Najash rionegrina Apesteguía & Zaher, 2006, a terrestrial fossil snake from the Upper Cretaceous of Argentina, represents the first known snake with a sacrum associated with robust, well-developed hind limbs. Najash rionegrina documents an important gap in the evolutionary development towards limblessness, because its phylogenetic affinities suggest that it is the sister group of all modern snakes, including the limbed Tethyan snakes Pachyrhachis, Haasiophis, and Eupodophis. The latter three limbed marine fossil snakes are shown to be more derived morphologically, because they lack a sacrum, but have articulated lymphapophyses, and their appendicular skeleton is enclosed by the rib cage, as in modern snakes.
Palabras clave:
Serpentes
,
Squamata
,
Systematics
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IBIGEO)
Articulos de INST.DE BIO Y GEOCIENCIAS DEL NOA
Articulos de INST.DE BIO Y GEOCIENCIAS DEL NOA
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Zaher, Hussam; Apesteguía, Sebastián; Scanferla, Carlos Agustín; The anatomy of the upper cretaceous snake najash rionegrina apesteguía & Zaher, 2006, and the evolution of limblessness in snakes; Wiley Blackwell Publishing, Inc; Zoological Journal of the Linnean Society; 156; 4; 8-2009; 801-826
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