A new close relative ofCarnotaurus sastreiBonaparte 1985 (Theropoda: Abelisauridae) from the Late Cretaceous of Patagonia

Coria, Rodolfo A.; Chiappe, Luis M.; Dingus, Lowell

doi:10.1671/0272-4634(2002)022[0460:ancroc]2.0.co;2

Cited by 140 publications

(155 citation statements)

References 5 publications

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“…In contrast, bilateral digit reduction (BDR) is characteristic of most other tetrapod groups 23 . However, the reduction of digit I in Limusaurus constitutes strong new evidence for BDR in ceratosaurs, particularly because other ceratosaurs also possess a somewhat reduced digit I 24,25 .…”

Section: Convergent Evolution Of Herbivorymentioning

confidence: 93%

A Jurassic ceratosaur from China helps clarify avian digital homologies

Clark

et al. 2009

Nature

198

312

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Section: Convergent Evolution Of Herbivorymentioning

confidence: 93%

A Jurassic ceratosaur from China helps clarify avian digital homologies

Clark

et al. 2009

Nature

198

312

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“…Abelisauroids are scarcely known from Jurassic and Early Cretaceous outcrops (Accarie et al 1995, Allain et al 2007, Bonaparte 1996, Rauhut 2005, Sereno & Brusatte 2008; conversely they are well documented in the Late Cretaceous of Europe, South America, Africa, Madagascar and India (e.g., Bonaparte 1991, Allain & Pereda-Suberbiola 2003, Sereno et al 2004, Carrano & Sampson 2008. In Patagonia remains of several abelisauroids have been exhumed in the last three decades, substantially increasing our knowledge of the clade (Bonaparte 1985;1991a, b;1996;Bonaparte & Novas 1985;Bonaparte et al 1990;Calvo et al 2004;Canale et al 2008;Coria 2001;Coria & Salgado 2000;Coria et al 2002Coria et al , 2006Juárez Valieri et al 2007;Lamanna et al 2002;Martínez et al 1986Martínez et al , 2004.…”

mentioning

confidence: 99%

First report of a derived abelisaurid theropod from the Bajo de la Carpa Formation (Late Cretaceous), Patagonia, Argentina

Ezcurra¹,

Méndez²

2009

Bull. Geosci.

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An isolated anterior caudal vertebra of a medium-large sized theropod dinosaur is reported here. It comes from the Bajo de la Carpa Formation (Santonian, Late Cretaceous), Río Colorado Subgroup, Río Negro Province, northern Patagonia, Argentina. The specimen, MACN-PV-RN 1012, exhibits several derived characters that are diagnostic among theropods. Specifically, MACN-PV-RN 1012 is referable to Abelisauroidea because it possesses a centrodiapophyseal lamina on the ventral surface of the transverse processes, and to Abelisauridae due to the presence of transverse processes that are 1.4 times longer than the anteroposterior length of the centrum, a large median depression anterior to the base of the neural spine, and the lack of a prespinal fossa. MACN-PV-RN 1012 is included within Carnotaurinae, sharing with Carnotaurus and Aucasaurus transverse processes that are oriented dorsolaterally at an angle of 45° or more with regard to the horizontal axis of the vertebra. Thus, the specimen described here constitutes the first record of a derived abelisaurid from the Bajo de la Carpa Formation

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“…Por lo tanto, en este trabajo se asigna la impronta al clado Theropoda como posible grupo productor. Dada la gran simetría lateral que presenta la huella, y sobre la base de la morfología del pie de los abelisáuridos (e.g., de Valais et al, 2002;Coria et al, 2002) y la probable edad cretácica de la Formación Misiones, se sugiere que el productor podría haber pertenecido a dicho grupo de terópodos.…”

Section: Discussionunclassified