The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia

A new crocodyliform specimen is presented here found in the Cerro Castaño Member of the Cerro Barcino Formation (Chubut Group). The material consists of cranial and postcranial remains that represent a new taxon that has strong affinities with Peirosauridae, but also shares derived features present...

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Autor principal: Leardi, J.M
Otros Autores: Pol, D.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2009
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100 1 |a Leardi, J.M. 
245 1 4 |a The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia 
260 |c 2009 
270 1 0 |m Leardi, J.M.; Laboratorio de Paleontología de Vertebrados, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, (C1428EGA), Buenos Aires, Argentina; email: juanmartinleardi@gmail.com 
506 |2 openaire  |e Política editorial 
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520 3 |a A new crocodyliform specimen is presented here found in the Cerro Castaño Member of the Cerro Barcino Formation (Chubut Group). The material consists of cranial and postcranial remains that represent a new taxon that has strong affinities with Peirosauridae, but also shares derived features present in Araripesuchus. The phylogenetic relationships of this new taxon were tested through a cladistic analysis depicting it as a member of the Peirosauridae. The inclusion of Barcinosuchus within this clade of basal mesoeucrocodylians is supported by the presence of hypapophyses up to the third or fourth dorsal vertebrae, anterolateral facing edge on postorbital, quadrate dorsal surface divided in two planes by a ridge; mandibular symphysis tapering anterirorly in ventral view, lateral surface of dentary convex anterior to mandibular fenestra, distal body of quadrate well developed, anteroposteriorly thin and lateromedially broad. The new specimen broadens the temporal and geographical distribution of Peirosauridae during the Cretaceous of Gondwana, representing the southern-most and the most ancient record of the group in Patagonia. The new material also provides insights on the postcranial anatomy of peirosaurids, a group that has been so far studied almost exclusively from cranial material. © 2009 Elsevier Ltd. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Jurassic Foundation 
536 |a Detalles de la financiación: The material reported here was found during fieldwork leaded by O.W. Rauhut in the Cerro Barcino Formation funded by the Jurassic Foundation (to O.W.R.). Special thanks are given to Ms. Laura Reiner for the detailed preparation of the specimen and to O. Rauhut for allowing the study of this specimen. Pablo Puerta, Magali Cardenas, Mariano Caffa and Leandro Canessa are thanked for their help during fieldwork. We would like to specially thank Aluar Aluminio Argentino SAIC for access to the SEM lab as well as the valuable help of Mr. Jaime Groizard. The program TNT is made freely available, thanks to a subsidy by the Willi Hennig Society. Special thanks are also given the following people for access to collections: J. Maisey and M. Norell (AMNH), D. Krause and G. Buckley (UA), R. Coria (MCF). Appendix 
593 |a Laboratorio de Paleontología de Vertebrados, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, (C1428EGA), Buenos Aires, Argentina 
593 |a Museo Paleontológico Egidio Feruglio, Avenue Fontana 140, 9100 Trelew, Chubut, Argentina 
593 |a CONICET- Consejo Nacional de Investigaciones Científicas y Técnicas, Avenue Rivadavia, 1917 Buenos Aires, Argentina 
651 4 |a ARGENTINA 
651 4 |a ARGENTINA 
651 4 |a CHUBUT 
651 4 |a SOUTH AMERICA 
690 1 0 |a CENTRAL PATAGONIA 
690 1 0 |a CROCODYLIFORMES 
690 1 0 |a LOWER CRETACEOUS 
690 1 0 |a PEIROSAURIDAE 
690 1 0 |a CRETACEOUS 
690 1 0 |a DINOSAUR 
690 1 0 |a GEOGRAPHICAL DISTRIBUTION 
690 1 0 |a GONDWANA 
690 1 0 |a NEW SPECIES 
690 1 0 |a PHYLOGENETICS 
690 1 0 |a SKELETAL REMAINS 
690 1 0 |a TAXONOMY 
690 1 0 |a TEMPORAL DISTRIBUTION 
690 1 0 |a PATAGONIA 
690 1 0 |a CROCODYLIFORMES 
690 1 0 |a MESOEUCROCODYLIA 
700 1 |a Pol, D. 
773 0 |d 2009  |g v. 30  |h pp. 1376-1386  |k n. 6  |p Cretaceous Res.  |x 01956671  |w (AR-BaUEN)CENRE-4335  |t Cretaceous Research 
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856 4 0 |u https://hdl.handle.net/20.500.12110/paper_01956671_v30_n6_p1376_Leardi  |y Handle 
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