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A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids.
Naturwissenschaften. 2005 May; 92(5):226-30.N

Abstract

The Cretaceous Carcharodontosauridae is the latest clade of carnosaurs, including the largest predatory dinosaurs yet recorded. Albeit spectacular for their size, the skeletal anatomy of these theropods remains poorly-known, and their diversity was until recently restricted to two Cenomanian species: the highly derived Giganotosaurus carolinii, from southern South America, and the incompletely known Carcharodontosaurus saharicus, from northern Africa. Here we describe an older and basal member of the group, Tyrannotitan chubutensis gen. et sp. nov., from Aptian strata of Patagonia, Argentina. The new taxon gives new insights into the systematics and evolution of carcharodontosaurids and offers a better understanding of the evolution of Southern theropod faunas. We suggest that carcharodontosaurids radiated in Gondwana sharing with spinosaurids the role of top-predators until their extinction in Cenomanian-Turonian times. During this interval, the diplodocoid sauropods and giant titanosaurians went extinct (probably as part of a global-scale crisis), and the smaller abelisaurid theropods took dominance, reigning until the end of the Cretaceous. Electronic Supplementary Material is available.

Authors+Show Affiliations

CONICET, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Av. Angel Gallardo 470, 1405, Buenos Aires, Argentina. fernovas@yahoo.com.arNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15834691

Citation

Novas, Fernando E., et al. "A Large Cretaceous Theropod From Patagonia, Argentina, and the Evolution of Carcharodontosaurids." Die Naturwissenschaften, vol. 92, no. 5, 2005, pp. 226-30.
Novas FE, de Valais S, Vickers-Rich P, et al. A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids. Naturwissenschaften. 2005;92(5):226-30.
Novas, F. E., de Valais, S., Vickers-Rich, P., & Rich, T. (2005). A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids. Die Naturwissenschaften, 92(5), 226-30.
Novas FE, et al. A Large Cretaceous Theropod From Patagonia, Argentina, and the Evolution of Carcharodontosaurids. Naturwissenschaften. 2005;92(5):226-30. PubMed PMID: 15834691.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids. AU - Novas,Fernando E, AU - de Valais,Silvina, AU - Vickers-Rich,Pat, AU - Rich,Tom, Y1 - 2005/04/16/ PY - 2004/03/11/received PY - 2005/02/23/accepted PY - 2005/4/19/pubmed PY - 2005/9/24/medline PY - 2005/4/19/entrez SP - 226 EP - 30 JF - Die Naturwissenschaften JO - Naturwissenschaften VL - 92 IS - 5 N2 - The Cretaceous Carcharodontosauridae is the latest clade of carnosaurs, including the largest predatory dinosaurs yet recorded. Albeit spectacular for their size, the skeletal anatomy of these theropods remains poorly-known, and their diversity was until recently restricted to two Cenomanian species: the highly derived Giganotosaurus carolinii, from southern South America, and the incompletely known Carcharodontosaurus saharicus, from northern Africa. Here we describe an older and basal member of the group, Tyrannotitan chubutensis gen. et sp. nov., from Aptian strata of Patagonia, Argentina. The new taxon gives new insights into the systematics and evolution of carcharodontosaurids and offers a better understanding of the evolution of Southern theropod faunas. We suggest that carcharodontosaurids radiated in Gondwana sharing with spinosaurids the role of top-predators until their extinction in Cenomanian-Turonian times. During this interval, the diplodocoid sauropods and giant titanosaurians went extinct (probably as part of a global-scale crisis), and the smaller abelisaurid theropods took dominance, reigning until the end of the Cretaceous. Electronic Supplementary Material is available. SN - 0028-1042 UR - https://www.unboundmedicine.com/medline/citation/15834691/A_large_Cretaceous_theropod_from_Patagonia_Argentina_and_the_evolution_of_carcharodontosaurids_ DB - PRIME DP - Unbound Medicine ER -
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