| Full text | |
| Author(s): |
Nascimento, Paulo Miranda
;
Zaher, Hussam
[2]
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Papéis Avulsos de Zoologia (São Paulo); v. 50, n. 21, p. 323-361, 2010. |
| Field of knowledge: | Biological Sciences - Zoology |
| Abstract | |
The present work describes a new species of Baurusuchidae from Upper Cretaceous sediments of the Bauru Basin, and provides the first complete postcranial description for the family. Many postcranial features observed in the new species are also present in other notosuchian taxa, and are thus considered plesiomorphic for the genus. These are: long cervical neural spines; robust deltopectoral crest of the humerus; large proximal portion in the radiale that contacts the ulna; ulnare anterior distal projection; supra-acetabular crest well developed laterally; post-acetabular process posterodorsally deflected; presence of an anteromedial crest in the femur; fourth trocanter of femur posteriorly positioned; tibia with a laterally curved shaft; calcaneum tuber posteroventrally oriented; osteoderms ornamented with grooves and imbricated in the tail. On the other hand, we found the following sacral and carpal features to be unique among all mesoeucrocodylians analyzed: transverse processes of sacral vertebrae dorsolaterally deflected; presence of a longitudinal crest in the lateral surface of sacral vertebrae; pisiform carpal with a condyle-like surface. The majority of these cited features corroborates a cursorial locomotion for the new species described in the present study, suggesting that members of the family Baurusuchidae were also cursorial species. (AU) | |
| FAPESP's process: | 02/13602-4 - Evolution of the southeastern Brazilian reptile fauna from Cretaceous: paleontology, phylogeny and biogeography |
| Grantee: | Hussam El Dine Zaher |
| Support type: | BIOTA-FAPESP Program - Thematic Grants |