First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia

"Here we describe the first fossil skull so far known for the turtle genus Chelus from the early Miocene (~ 16 m.y.), Castilletes Formation, Alta Guajira Peninsula, Cocinetas basin, Colombia. The skull is partially preserved, including most of the basicranium (pteygoid-bassioccipital bones) and...

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Autores Principales: Cadena, Edwin A., Jaramillo, Carlos A.
Formato: Artículo (Article)
Lenguaje:Inglés (English)
Publicado: Palaeontologia Electronica 2015
Materias:
Acceso en línea:https://repository.urosario.edu.co/handle/10336/27739
id ir-10336-27739
recordtype dspace
spelling ir-10336-277392020-08-19T14:43:37Z First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia Primer cráneo fósil de chelus (Pleurodira: Chelidae, tortuga matamata): del mioceno temprano de Colombia Cadena, Edwin A. Jaramillo, Carlos A. Chelidae Testudines Colombia South America La Guajira "Here we describe the first fossil skull so far known for the turtle genus Chelus from the early Miocene (~ 16 m.y.), Castilletes Formation, Alta Guajira Peninsula, Cocinetas basin, Colombia. The skull is partially preserved, including most of the basicranium (pteygoid-bassioccipital bones) and the roof elements including the parietal, pterygoid and portions of the squamosal, supraoccipital and the most dorsal quadrate. The skull is preserved in three dimensions, without evidence of crushing, allowing the observation of the internal braincase morphology using microcomputer tomography. Comparisons with the skull of the only extant species for the genus Chelus fimbriata (Matamata turtle) allow us to conclude that for the last 16 million years the morphology of the skull for this genus has remained almost unvarying, with only a slightly higher compression of the most anterior braincase exhibited by the extant species. Due to its fragmentary condition, a more refined identification beyond the genus (Chelus sp.) is not possible; however, the overall skull design indicates that the fossil species could also have had the same ecological and dietary adaptations as its extant relative." 2015 2020-08-19T14:43:37Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion ISSN: 1935-3952 EISSN: 1094-8074 https://repository.urosario.edu.co/handle/10336/27739 eng info:eu-repo/semantics/openAccess application/pdf Palaeontologia Electronica Palaeontologia Electronica
institution EdocUR - Universidad del Rosario
collection DSpace
language Inglés (English)
topic Chelidae
Testudines
Colombia
South America
La Guajira
spellingShingle Chelidae
Testudines
Colombia
South America
La Guajira
Cadena, Edwin A.
Jaramillo, Carlos A.
First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia
description "Here we describe the first fossil skull so far known for the turtle genus Chelus from the early Miocene (~ 16 m.y.), Castilletes Formation, Alta Guajira Peninsula, Cocinetas basin, Colombia. The skull is partially preserved, including most of the basicranium (pteygoid-bassioccipital bones) and the roof elements including the parietal, pterygoid and portions of the squamosal, supraoccipital and the most dorsal quadrate. The skull is preserved in three dimensions, without evidence of crushing, allowing the observation of the internal braincase morphology using microcomputer tomography. Comparisons with the skull of the only extant species for the genus Chelus fimbriata (Matamata turtle) allow us to conclude that for the last 16 million years the morphology of the skull for this genus has remained almost unvarying, with only a slightly higher compression of the most anterior braincase exhibited by the extant species. Due to its fragmentary condition, a more refined identification beyond the genus (Chelus sp.) is not possible; however, the overall skull design indicates that the fossil species could also have had the same ecological and dietary adaptations as its extant relative."
format Artículo (Article)
author Cadena, Edwin A.
Jaramillo, Carlos A.
author_facet Cadena, Edwin A.
Jaramillo, Carlos A.
author_sort Cadena, Edwin A.
title First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia
title_short First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia
title_full First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia
title_fullStr First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia
title_full_unstemmed First fossil skull of chelus (Pleurodira: Chelidae, matamata turtle): from the early miocene of Colombia
title_sort first fossil skull of chelus (pleurodira: chelidae, matamata turtle): from the early miocene of colombia
publisher Palaeontologia Electronica
publishDate 2015
url https://repository.urosario.edu.co/handle/10336/27739
_version_ 1676074322356076544
score 11,383075