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A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids.
Naturwissenschaften. 2011 May; 98(5):369-79.N

Abstract

Heterodontosauridae is a morphologically divergent group of dinosaurs that has recently been interpreted as one of the most basal clades of Ornithischia. Heterodontosaurid remains were previously known from the Early Jurassic of southern Africa, but recent discoveries and studies have significantly increased the geographical and temporal range for this clade. Here, we report a new ornithischian dinosaur from the Middle Jurassic Cañadón Asfalto Formation in central Patagonia, Argentina. This new taxon, Manidens condorensis gen. et sp. nov., includes well-preserved craniomandibular and postcranial remains and represents the only diagnostic ornithischian specimen yet discovered in the Jurassic of South America so far. Derived features of its anatomy indicate that Manidens belongs to Heterodontosauridae, as the sister taxon of Heterodontosaurus and other South African heterodontosaurids. The presence of posterior dentary teeth with high crowns but lacking extensive wear facets in Manidens suggests that this form represents an intermediate stage in the development of the remarkable adaptations to herbivory described for Heterodontosaurus. The dentition of Manidens condorensis also has autapomorphies, such as asymmetrically arranged denticles in posterior teeth and a mesially projected denticle in the posteriormost teeth. At an estimated total length of 60-75 cm, Manidens furthermore confirms the small size of basal heterodontosaurids.

Authors+Show Affiliations

CONICET, Museo Paleontológico Egidio Feruglio, Fontana 140, 9100, Trelew, Argentina. dpol@mef.org.arNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

21452054

Citation

Pol, Diego, et al. "A Middle Jurassic Heterodontosaurid Dinosaur From Patagonia and the Evolution of Heterodontosaurids." Die Naturwissenschaften, vol. 98, no. 5, 2011, pp. 369-79.
Pol D, Rauhut OW, Becerra M. A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids. Naturwissenschaften. 2011;98(5):369-79.
Pol, D., Rauhut, O. W., & Becerra, M. (2011). A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids. Die Naturwissenschaften, 98(5), 369-79. https://doi.org/10.1007/s00114-011-0780-5
Pol D, Rauhut OW, Becerra M. A Middle Jurassic Heterodontosaurid Dinosaur From Patagonia and the Evolution of Heterodontosaurids. Naturwissenschaften. 2011;98(5):369-79. PubMed PMID: 21452054.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids. AU - Pol,Diego, AU - Rauhut,Oliver W M, AU - Becerra,Marcos, Y1 - 2011/03/31/ PY - 2010/10/09/received PY - 2011/03/03/accepted PY - 2011/02/28/revised PY - 2011/4/1/entrez PY - 2011/4/1/pubmed PY - 2011/10/13/medline SP - 369 EP - 79 JF - Die Naturwissenschaften JO - Naturwissenschaften VL - 98 IS - 5 N2 - Heterodontosauridae is a morphologically divergent group of dinosaurs that has recently been interpreted as one of the most basal clades of Ornithischia. Heterodontosaurid remains were previously known from the Early Jurassic of southern Africa, but recent discoveries and studies have significantly increased the geographical and temporal range for this clade. Here, we report a new ornithischian dinosaur from the Middle Jurassic Cañadón Asfalto Formation in central Patagonia, Argentina. This new taxon, Manidens condorensis gen. et sp. nov., includes well-preserved craniomandibular and postcranial remains and represents the only diagnostic ornithischian specimen yet discovered in the Jurassic of South America so far. Derived features of its anatomy indicate that Manidens belongs to Heterodontosauridae, as the sister taxon of Heterodontosaurus and other South African heterodontosaurids. The presence of posterior dentary teeth with high crowns but lacking extensive wear facets in Manidens suggests that this form represents an intermediate stage in the development of the remarkable adaptations to herbivory described for Heterodontosaurus. The dentition of Manidens condorensis also has autapomorphies, such as asymmetrically arranged denticles in posterior teeth and a mesially projected denticle in the posteriormost teeth. At an estimated total length of 60-75 cm, Manidens furthermore confirms the small size of basal heterodontosaurids. SN - 1432-1904 UR - https://www.unboundmedicine.com/medline/citation/21452054/A_Middle_Jurassic_heterodontosaurid_dinosaur_from_Patagonia_and_the_evolution_of_heterodontosaurids_ L2 - https://dx.doi.org/10.1007/s00114-011-0780-5 DB - PRIME DP - Unbound Medicine ER -