Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8916412 | Cretaceous Research | 2018 | 26 Pages |
Abstract
Several remains of an abelisaurid theropod including a nearly complete sacral complex articulated with both ilia, the distal boot of the pubes, the furcula, teeth, and fragments of transverse processes of caudal vertebrae was discovered in the La Invernada fossil site, northern Patagonia from the Bajo de la Carpa Formation (Santonian). The sacrum exhibit features typical of abelisauroids as narrowing of the middle sacral centra, fused neural spines forming a continuous sheet and ventral bow of the sacrum, in lateral view. The furcula represents de first mention of this bone for a South American abelisaurid. The morphology observed in the transverse processes with distal end projected forward and sagittal ridge on the ventral surface allows its taxonomic assignment to the clade Brachyrostra.
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Authors
Ariel H. Méndez, Leonardo S. Filippi, Federico A. Gianechini, Rubén D. Juárez Valieri,