[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Abelisauroid theropod from Brazil (free pdf)
From: Ben Creisler
A new online paper for the open-access journal Revista Mexicana de
Ciencias Geológicas. The theropod may be a new taxon but is unnamed in
Elaine B. Machado, Diogenes de A. Campos, Jorge O. Calvo & Alexander
W. A. Kellner (2013)
A new Abelisauroid from the Upper Cretaceous of Brazil.
Revista Mexicana de Ciencias Geológicas (advance online publication)
Although important dinosaur specimens have been recently described
from Brazil, the theropod record in this county is still rather
scarce, particularly from Cretaceous strata. Here we describe a
complete right tibia (MCT 1783-R) from the Marília Formation
(Maastrichtian, Bauru Basin) near Peirópolis (Uberaba, Minas Gerais).
This is the best theropod specimen recovered from this unit after five
decades of collecting. MCT 1783-R shows a well developed cnemial crest
with a lobular distal end, that projects significantly above the
proximal articular surface, features that are characteristic of the
Abelisauroidea. It further shows unique characters such as a marked
asymmetry of lateral and medial condyles in posterior view, and a very
deep triangular articular face for the astragalus, suggesting that it
represents a new taxon.