Lamnoid vertebrae from the Agua Nueva Formation (Upper Cretaceous:Lower Turonian), northeastern Mexico

被引：0
|
作者：
Blanco-Piñón, A
Shimada, K
González-Barba, G
机构：
[1] Univ Auton Estado Hidalgo, Ctr Invest Ciencias Tierra, Pachuca, Hidalgo, Mexico
[2] De Paul Univ, Environm Sci Program, Chicago, IL 60614 USA
[3] De Paul Univ, Dept Biol Sci, Chicago, IL 60614 USA
[4] Ft Hays State Univ, Sternberg Museum Nat Hist, Hays, KS 67601 USA
[5] Univ Autonoma Baja California, Dept Geol, La Paz 23080, Baja Calif Sur, Mexico
来源：
REVISTA MEXICANA DE CIENCIAS GEOLOGICAS | 2005年 / 22卷 / 01期
关键词：
lamniform; shark; vertebral series; Turonian; Vallecillo; Mexico;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
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.
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页码：19 / 23
页数：5
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