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A reappraisal of Notohypshilophodon comodorensis (Ornithischia: Ornithopoda) from the Late Cretaceous of Patagonia, Argentina.
Zootaxa. 2014 Apr 11; 3786:401-22.Z

Abstract

The Bajo Barreal Formation (Cenomanian, Late Cretaceous; central Patagonia, Argentina) preserves an important and rich fossil record. Among the dinosaurs described, a small ornithischian, Notohypsilophon comodorensis, was named in the 1990s. This small-bodied dinosaur, the most complete representative of the group discovered in that formation, was described as a "hypsilophodontid" ornithopod based on close morphological affinities with other members of that group, which is currently regarded as paraphyletic. Within this context, we present a restudy of Notohypsilophodon. This dinosaur is considered a basal ornithopod, probably more basal than Gasparinisaura. Likewise, this analysis emends and provides additional unique anatomical characters that support its taxonomic validity and position. On the basis of weak evidence, Notohypsilophodon might share the presence of gastroliths with other basal ornithopods (Gasparinisaura and Haya), which could suggest a specific behavior in response to its food ingestion. Finally, this study increases our knowledge of the evolutionary dynamics of South American Cretaceous ornithopods, and therefore broadens our knowledge of the early Late Cretaceous continental vertebrate assemblages of central Patagonia and of the Southern Hemisphere in general.

Authors+Show Affiliations

Laboratorio de Paleontología, Centro Nacional Patagónico (CENPAT-CONICET), Boulevard Almirante Brown 2915, (9120) Puerto Madryn, Chubut, Argentina.; Email: ibiriculm@yahoo.com.ar.Laboratorio de Paleovertebrados, Universidad Nacional de la Patagonia San Juan Bosco, C.C. 360, (9000) Comodoro Rivadavia, Chubut, Argentina.; Email: rdfmartinez@yahoo.com.Laboratorio de Paleovertebrados, Universidad Nacional de la Patagonia San Juan Bosco, C.C. 360, (9000) Comodoro Rivadavia, Chubut, Argentina.; Email: paleo@unpata.edu.ar.Laboratorio de Paleovertebrados, Universidad Nacional de la Patagonia San Juan Bosco, C.C. 360, (9000) Comodoro Rivadavia, Chubut, Argentina.; Email: paleogac@yahoo.com.ar.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24869543

Citation

Ibiricu, Lucio M., et al. "A Reappraisal of Notohypshilophodon Comodorensis (Ornithischia: Ornithopoda) From the Late Cretaceous of Patagonia, Argentina." Zootaxa, vol. 3786, 2014, pp. 401-22.
Ibiricu LM, Martínez RD, Luna A, et al. A reappraisal of Notohypshilophodon comodorensis (Ornithischia: Ornithopoda) from the Late Cretaceous of Patagonia, Argentina. Zootaxa. 2014;3786:401-22.
Ibiricu, L. M., Martínez, R. D., Luna, A., & Casal, G. A. (2014). A reappraisal of Notohypshilophodon comodorensis (Ornithischia: Ornithopoda) from the Late Cretaceous of Patagonia, Argentina. Zootaxa, 3786, 401-22. https://doi.org/10.11646/zootaxa.3786.4.1
Ibiricu LM, et al. A Reappraisal of Notohypshilophodon Comodorensis (Ornithischia: Ornithopoda) From the Late Cretaceous of Patagonia, Argentina. Zootaxa. 2014 Apr 11;3786:401-22. PubMed PMID: 24869543.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A reappraisal of Notohypshilophodon comodorensis (Ornithischia: Ornithopoda) from the Late Cretaceous of Patagonia, Argentina. AU - Ibiricu,Lucio M, AU - Martínez,Rubén D, AU - Luna,Arcelo, AU - Casal,Gabriel A, Y1 - 2014/04/11/ PY - 2014/04/10/received PY - 2014/5/30/entrez PY - 2014/5/30/pubmed PY - 2014/8/22/medline SP - 401 EP - 22 JF - Zootaxa JO - Zootaxa VL - 3786 N2 - The Bajo Barreal Formation (Cenomanian, Late Cretaceous; central Patagonia, Argentina) preserves an important and rich fossil record. Among the dinosaurs described, a small ornithischian, Notohypsilophon comodorensis, was named in the 1990s. This small-bodied dinosaur, the most complete representative of the group discovered in that formation, was described as a "hypsilophodontid" ornithopod based on close morphological affinities with other members of that group, which is currently regarded as paraphyletic. Within this context, we present a restudy of Notohypsilophodon. This dinosaur is considered a basal ornithopod, probably more basal than Gasparinisaura. Likewise, this analysis emends and provides additional unique anatomical characters that support its taxonomic validity and position. On the basis of weak evidence, Notohypsilophodon might share the presence of gastroliths with other basal ornithopods (Gasparinisaura and Haya), which could suggest a specific behavior in response to its food ingestion. Finally, this study increases our knowledge of the evolutionary dynamics of South American Cretaceous ornithopods, and therefore broadens our knowledge of the early Late Cretaceous continental vertebrate assemblages of central Patagonia and of the Southern Hemisphere in general. SN - 1175-5326 UR - https://www.unboundmedicine.com/medline/citation/24869543/A_reappraisal_of_Notohypshilophodon_comodorensis__Ornithischia:_Ornithopoda__from_the_Late_Cretaceous_of_Patagonia_Argentina_ DB - PRIME DP - Unbound Medicine ER -