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[dinosaur] Barrosasuchus, new peirosaurid notosuchian from Upper Cretaceous of Argentina




Ben Creisler
bcreisler@gmail.com


A new paper:


Barrosasuchus neuquenianus gen. et sp. nov.Â


Rodolfo A. Coria, Francisco Ortega, Andrea B. Arcucci & Philip J.Currie (2018)
A new and complete peirosaurid (Crocodyliformes, Notosuchia) from Sierra Barrosa (Santonian, Upper Cretaceous) of the NeuquÃn Basin, Argentina.
Cretaceous Research (advance online publication)
doi: https://doi.org/10.1016/j.cretres.2018.11.008Â
https://www.sciencedirect.com/science/article/pii/S0195667118300831

Highlights

Barrosasuchus neuquenianus is a new South American Upper Cretaceous peirosaurid crocodile.
Barrosasuchus is the most complete peirosaurid crocodile recorded in Patagonia at present.
Barrosasuchus is a member of the major Upper Cretaceous diversity of peirosaurids.

Abstract

A new peirosaurid crocodyliform from the Upper Cretaceous (Santonian) of South America, Barrosasuchus neuquenianus gen. et sp. nov. is here described. Barrosasuchus is distinguished by a combination of features that include: presence of a foramen at the mid-point of the dorsal surface of the mandibular symphysis; quadratojugal dorsally broad, extensively contacting the postorbital articulation; absence of ventral exposure of splenials along mandibular rami, posterior to the symphysis; mid to posterior teeth with roots and crowns highly compressed laterally; presence of longitudinal depressions on palatal surface of maxillae; and anterior dentary alveoli strongly procumbent.

The holotype specimen of Barrosasuchus neuquenianus, MCF-PVPH-413 is represented by an almost complete skull and most of the articulated postcranial skeleton. Thus, Barrosasuchus is currently the most complete peirosaurid taxon known from Patagonia, and represents a key element for future reviews of the phylogeny of the group. Peirosauridae represents a successful clade in Gondwana, and particularly in Patagonia, with at least six distinct genera currently recorded.


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