Lamnoid vertebrae from the Agua Nueva Formation (Upper Cretaceous: lower Turonian), northeastern Mexico
A partial vertebral series of a lamniform shark (Chondrichthyes: Elasmobranchii) occurred in the “Vallecillo fish Member” of the Agua Nueva Formation (Upper Cretaceous: Lower Turonian) at Vallecillo, Mexico. Its taxonomic assignment below the ordinal level is tenuous, but the vertebrae closely resemb...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Mexicana de Ciencias Geológicas |
| Idioma: | inglés |
| OAI Identifier: | oai:ojs.rmcg.geociencias.unam.mx:article/861 |
| Acceso en línea: | http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/861 |
| Access Level: | acceso abierto |
| Sumario: | A partial vertebral series of a lamniform shark (Chondrichthyes: Elasmobranchii) occurred in the “Vallecillo fish Member” of the Agua Nueva Formation (Upper Cretaceous: Lower Turonian) at Vallecillo, Mexico. Its taxonomic assignment below the ordinal level is tenuous, but the vertebrae closely resemble those of cretoxyrhinid sharks.This report represents the first documentation of a Cretaceous lamniform shark in northeastern Mexico. The shark could have measured slightly over 3 m in total body length. Because the vertebrae are articulated and are three-dimensionally preserved, they are thought to be deposited rather quickly on a soft oceanfloor after decomposition of most of the shark carcass. |
|---|