A basal Pachyrhizodontid fish (Actinopterygii, Teleostei) from the Lower Cretaceous of the Tlayua Quarry, Central Mexico

被引：11
作者：
Alvarado-Ortega, Jesus [1 ,2 ]
de Mayrinck, Diogo [1 ]
Brito, Paulo M. [1 ]
机构：
[1] Univ Estado Rio de Janeiro, Dept Zool, Inst Biol, BR-20559900 Rio De Janeiro, Brazil
[2] Univ Nacl Autonoma Mexico, Inst Geol, Coyoacan 04510, DF, Mexico
来源：
COMPTES RENDUS PALEVOL | 2008年 / 7卷 / 05期
关键词：
Cretaceous; Tlayua; Pachyrhizodontoidei; Teleostei; Mexico;
D O I：
10.1016/j.crpv.2008.03.006
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
Michin csernai gen. et sp. nov. from the Early Cretaceous (Albian) limestones of the Tlayua Quarry, Puebla State, Central Mexico, is assigned to the Teleost clade Pachyrhizodontoidei as it possesses the enlarged inner premaxillary tooth, which is a unique synapontorphy of this clade. Additionally, the occurrence of relatively primitive characters (e.g., united parietals, anguiar and articular completely fused, caudal fin with five uroneurals) suggests that Michin csernai represents the most basal representative of the pachyrhizodontids.
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页码：269 / 275
页数：7
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