A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina

The Uquia Formation (middle Pliocene-lower Pleistocene) crops out in Quebrada de Humahuaca (Jujuy Province, northwestern Argentina) and contains an important record of fossil vertebrates that documents the event known as the Great American Biotic Interchange (GABI). We present a new fossil lizard fr...

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Detalles Bibliográficos
Autores principales:	García López, D. A., Daza, J., Aredez, Virginia Abdala de, Arias, S., Ortíz, P. E.
Formato:	Objeto de conferencia Resumen
Lenguaje:	Inglés
Publicado:	2010
Materias:	Ciencias Naturales Paleontología Fossil lizard
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/16879
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-16879
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales Paleontología Fossil lizard
spellingShingle	Ciencias Naturales Paleontología Fossil lizard García López, D. A. Daza, J. Aredez, Virginia Abdala de Arias, S. Ortíz, P. E. A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina
topic_facet	Ciencias Naturales Paleontología Fossil lizard
description	The Uquia Formation (middle Pliocene-lower Pleistocene) crops out in Quebrada de Humahuaca (Jujuy Province, northwestern Argentina) and contains an important record of fossil vertebrates that documents the event known as the Great American Biotic Interchange (GABI). We present a new fossil lizard from San Roque locality, near Humahuaca town, recovered in levels referred to late Pliocene. The material consists of one premaxilla, one maxilla, and several dentaries bearing teeth belonging to at least three individuals. The remains were part of a microvertebrate fossil assemblage that also includes amphibians, birds, rodents, and marsupials. Corrosion signals on the enamel of rodent teeth indicate that this assemblage was formed by the trophic activities of predatory birds. The phylogenetic analysis performed with 396 morphological characters places this new lizard as the sister taxon of a clade composed by Liolaemidae, Leiocephalidae, and Tropiduridae. Its uncertain position and substantial morphological differences justify its placement in a new genus. The results of this analysis support the monophyletic status of Iguanoidea and support other groups within Iguania. This is the first record of a Squamata for the Uquia Formation levels, which mainly contain medium to large sized mammals. The presence of extant rodent genera in the assemblage indicates arid paleoenvironmental conditions, similar to that currently found in the area.
format	Objeto de conferencia Resumen
author	García López, D. A. Daza, J. Aredez, Virginia Abdala de Arias, S. Ortíz, P. E.
author_facet	García López, D. A. Daza, J. Aredez, Virginia Abdala de Arias, S. Ortíz, P. E.
author_sort	García López, D. A.
title	A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina
title_short	A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina
title_full	A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina
title_fullStr	A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina
title_full_unstemmed	A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina
title_sort	fossil lizard (iguanoidea) from the upper pliocene of northwestern argentina
publishDate	2010
url	http://sedici.unlp.edu.ar/handle/10915/16879
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bdutipo_str	Repositorios
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A fossil lizard (Iguanoidea) from the upper Pliocene of northwestern Argentina

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