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

Jesús ALVARADO-ORTEGA, Diogo DE MAYRINCK & Paulo Marques Machado BRITO

en Comptes Rendus Palevol 7 (5) - Pages 269-275

Published on 31 July 2008

Michin csernai gen. et sp. nov. from the Early Cretaceous (Albian) limestones of the Tlayúa Quarry, Puebla State, Central Mexico, is assigned to the Teleost clade Pachyrhizodontoidei as it possesses the enlarged inner premaxillary tooth, which is a unique synapomorphy of this clade. Additionally, the occurrence of relatively primitive characters (e.g., united parietals, angular and articular completely fused, caudal fin with five uroneurals) suggests that Michin csernai represents the most basal representative of the pachyrhizodontids.


Cretaceous, Tlayúa, Pachyrhizodontoidei, Teleostei, Mexico

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