First Natural Endocranial Cast of a Fossil Snake (Cretaceous of Patagonia, Argentina)

In this study, we describe a natural endocranial cast included in a partially preserved medium‐sized skull of the Upper Cretaceous South American snake <i>Dinilysia patagonica</i>. The endocast is composed of sedimentary filling of the cranial cavity in which the posterior brain, the ves...

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Autores principales: Triviño, Laura Natalia, Albino, Adriana María, Dozo, María Teresa, Williams, Jorge Daniel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
Zoología
Snakes
Cretaceous
Dinilysia patagonica
Palaeoneurology
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/102382
https://ri.conicet.gov.ar/11336/49740
https://onlinelibrary.wiley.com/doi/abs/10.1002/ar.23686
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-102382
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
Zoología
Snakes
Cretaceous
Dinilysia patagonica
Palaeoneurology
spellingShingle Ciencias Naturales
Zoología
Snakes
Cretaceous
Dinilysia patagonica
Palaeoneurology
Triviño, Laura Natalia
Albino, Adriana María
Dozo, María Teresa
Williams, Jorge Daniel
First Natural Endocranial Cast of a Fossil Snake (Cretaceous of Patagonia, Argentina)
topic_facet Ciencias Naturales
Zoología
Snakes
Cretaceous
Dinilysia patagonica
Palaeoneurology
description In this study, we describe a natural endocranial cast included in a partially preserved medium‐sized skull of the Upper Cretaceous South American snake <i>Dinilysia patagonica</i>. The endocast is composed of sedimentary filling of the cranial cavity in which the posterior brain, the vessels, the cranial nerves, and the inner ear surrounded by delicate semicircular canals, are represented. It is simple in form, with little differentiation between the three main areas (Forebrain, Midbrain, and Hindbrain), and without flexures. The nervous system is well preserved. The posterior brain surface is smooth, except for two small prominences that make up the cerebellum. A large inner ear is preserved on the right side; it consists of a voluminous central mass, the vestibule, which occupies most of the space defined by the three semicircular canals. In particular, the lateral semicircular canal is very close to the vestibule. This characteristic, in combination with the medium to large body size of <i>Dinilysia</i>, its large skull and dorsally exposed orbits, and vertebrae bearing a rather high neural spine on a depressed neural arch, suggests that this snake would have had a semifossorial lifestyle.
format Articulo
Articulo
author Triviño, Laura Natalia
Albino, Adriana María
Dozo, María Teresa
Williams, Jorge Daniel
author_facet Triviño, Laura Natalia
Albino, Adriana María
Dozo, María Teresa
Williams, Jorge Daniel
author_sort Triviño, Laura Natalia
title First Natural Endocranial Cast of a Fossil Snake (Cretaceous of Patagonia, Argentina)
title_short First Natural Endocranial Cast of a Fossil Snake (Cretaceous of Patagonia, Argentina)
title_full First Natural Endocranial Cast of a Fossil Snake (Cretaceous of Patagonia, Argentina)
title_fullStr First Natural Endocranial Cast of a Fossil Snake (Cretaceous of Patagonia, Argentina)
title_full_unstemmed First Natural Endocranial Cast of a Fossil Snake (Cretaceous of Patagonia, Argentina)
title_sort first natural endocranial cast of a fossil snake (cretaceous of patagonia, argentina)
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/102382
https://ri.conicet.gov.ar/11336/49740
https://onlinelibrary.wiley.com/doi/abs/10.1002/ar.23686
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AT dozomariateresa firstnaturalendocranialcastofafossilsnakecretaceousofpatagoniaargentina
AT williamsjorgedaniel firstnaturalendocranialcastofafossilsnakecretaceousofpatagoniaargentina
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