[dinosaur] Tralkasaurus, new abelisaurid from Upper C retaceous of Río Negro Province, Argentina

Ben Creisler
[email protected]

A new paper:

Tralkasaurus cuyi nov. gen. et sp.

M. A. Cerroni, M. J. Motta, F. L. Agnolín, A. M. Aranciaga Rolando, F.B.
Egli & F. E. Novas (2019)
A new abelisaurid from the Huincul Formation (Cenomanian-Turonian; Upper
Cretaceous) of Río Negro province, Argentina.
Journal of South American Earth Sciences: Article 102445 (advance online
publication)
doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1016_j.jsames.2019.102445&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=TVF_5QKhxlhSHCHUdY3EP7M4PJ2_PX8aVtQojf12N9w&s=GGGIyroIIt0ydqfGuFgiA_6LRWKGRpdRlh74IgbexF8&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sciencedirect.com_science_article_abs_pii_S0895981119304766&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=TVF_5QKhxlhSHCHUdY3EP7M4PJ2_PX8aVtQojf12N9w&s=qZsTuQRz9yPCBXo13aXEIg7RLOgdYXzHraCl59P7o1w&e= 


Highlights

We describe a new species of Abelisauride from the Huincul Formation
(Cenomanian-Turonian), Rio Negro province, Patagonia, Argentina.
Tralkasaurus cuyi nov. gen. et sp. constitutes a new form of medium-sized
abelisaurid.
The phylogenetic analysis resulted in the nesting of Tralkasaurus as a
basal abelisaurid.
The new abelisaurid affords new evidence regarding small to medium-sized
abelisaurids from Patagonia.


Abstract

The record of abelisaurids in South America, particularly Argentina is
relatively abundant. However, abelisaurid diversity is far from being
well-known. Huincul Formation has yielded diverse theropod remains,
including the abelisaurids Ilokelesia and Skorpiovenator. The aim of the
present contribution is to describe a new abelisaurid coming from the Upper
Section of the Huincul Formation (Cretaceous; Cenomanian-Turonian) at the
Violante Farm fossil site, Río Negro province, northern Patagonia,
Argentina. The new taxon described in this contribution is represented by
an incomplete specimen including well-preserved maxilla and dorsal
vertebrae, and distorted pelvic girdle and caudal and sacral vertebrae. Its
size, much smaller than large abelisaurids as Abelisaurus and Carnotaurus
indicates that the new taxon probably occupied a different ecological niche
within the carnivoran guild.

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