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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

An Early Cretaceous theropod dinosaur from Brazil sheds light on the cranial evolution of the Abelisauridae

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Author(s):
Zaher, Hussam [1, 2] ; Pol, Diego [3] ; Navarro, Bruno A. [1, 4] ; Delcourt, Rafael [1, 5, 6] ; Carvalho, Alberto B. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Museu Zool, Av Nazare 481, BR-04263000 Sao Paulo, SP - Brazil
[2] Sorbonne Univ, Ctr Rech Paleobiodiversite & Paleoenvironm, Dept Origines & Evolut, Museum Natl Hist Nat, CR2P, CNRS, MNHN, UPMC, Case Postale 38, 57 Rue Cuvier, F-75231 Paris 05 - France
[3] Consejo Nacl Invest Cient & Tecn, Museo Paleontol Egidio Feruglio, Av Fontana 140, RA-9100 Trelew, Chubut - Argentina
[4] Univ Sao Paulo, Inst Biociencias, Programa Posgrad Zool, Rua Matao 321, Travessa 14, Sao Paulo, SP - Brazil
[5] Univ Fed Rio de Janeiro, Dept Geol & Paleontol, Museu Nacl, BR-20940040 Rio De Janeiro, RJ - Brazil
[6] Univ Estadual Campinas, Inst Geociencias, Rua Carlos Gomes 250, BR-13083855 Campinas, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Source: COMPTES RENDUS PALEVOL; v. 19, n. 6, p. 101-115, OCT 12 2020.
Web of Science Citations: 0
Abstract

Abelisaurid theropods dominated the predator role across Gondwana during the Late Cretaceous. They are characterized by highly reduced forelimbs and one of the most specialized cranial morphologies among carnivorous dinosaurs, exemplified by a broad skull, short rostrum, high occipital region, and highly kinetic intramandibular joint, suggestive of a specialized feeding strategy. Late Cretaceous abelisaurids are known from some remarkably complete taxa with well-preserved skulls. However, little is known about the pattern of character transformation that led to their highly modified condition because there are no well-preserved abelisaurids before the Late Cretaceous. Here we report a basal abelisaurid from the Early Cretaceous of Brazil that preserves a complete skull and reveals an early stage in the cranial evolution of the group. It lacks the specialized temporal and mandibular features characteristic of derived abelisaurids, including the kinetic intramandibular joint and knob-like dorsal projection of the parietals. (AU)

FAPESP's process: 11/50206-9 - Origin and evolution of snakes and their diversification in the Neotropics: a multidisciplinary approach
Grantee:Hussam El Dine Zaher
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 14/02805-9 - Anatomy and phylogenetic relationships of a new theropod dinosaur from the early Cretaceous of Brazil and the diversification of abelisaurid dinosaurs in the early Cretaceous of Gondwana
Grantee:Hussam El Dine Zaher
Support type: Research Grants - Visiting Researcher Grant - International
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