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Using dental enamel wrinkling to define sauropod tooth morphotypes from the Cañadón Asfalto Formation, Patagonia, Argentina.
PLoS One. 2015; 10(2):e0118100.Plos

Abstract

The early Middle Jurassic is regarded as the period when sauropods diversified and became major components of the terrestrial ecosystems. Not many sites yield sauropod material of this time; however, both cranial and postcranial material of eusauropods have been found in the Cañadón Asfalto Formation (latest Early Jurassic-early Middle Jurassic) in Central Patagonia (Argentina), which may help to shed light on the early evolution of eusauropods. These eusauropod remains include teeth associated with cranial and mandibular material as well as isolated teeth found at different localities. In this study, an assemblage of sauropod teeth from the Cañadón Asfalto Formation found in four different localities in the area of Cerro Condor (Chubut, Argentina) is used as a mean of assessing sauropod species diversity at these sites. By using dental enamel wrinkling, primarily based on the shape and orientation of grooves and crests of this wrinkling, we define and describe three different morphotypes. With the exception of one taxon, for which no cranial material is currently known, these morphotypes match the local eusauropod diversity as assessed based on postcranial material. Morphotype I is tentatively assigned to Patagosaurus, whereas morphotypes II and III correspond to new taxa, which are also distinguished by associated postcranial material. This study thus shows that enamel wrinkling can be used as a tool in assessing sauropod diversity.

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Authors+Show Affiliations

Holwerda FM
Staatliche Naturwissenschaftliche Sammlungen Bayerns (SNSB), Bayerische Staatssammlung für Paläontologie und Geologie, München, Germany; GeoBioTec, Departamento de Ciências da Terra, Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa, Caparica, Portugal; Department of Earth and Environmental Sciences and GeoBioCenter, Ludwig Maximilians Universität, München, Germany.
Pol D
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina; Museo Paleontológico Egidio Feruglio, Trelew, Argentina.
Rauhut OW
Staatliche Naturwissenschaftliche Sammlungen Bayerns (SNSB), Bayerische Staatssammlung für Paläontologie und Geologie, München, Germany; Department of Earth and Environmental Sciences and GeoBioCenter, Ludwig Maximilians Universität, München, Germany.

MeSH

AnimalsArgentinaBiological EvolutionDental EnamelDinosaursFossilsTooth

Pub Type(s)

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

Language

eng

PubMed ID

25692466

Citation

Holwerda, Femke M., et al. "Using Dental Enamel Wrinkling to Define Sauropod Tooth Morphotypes From the Cañadón Asfalto Formation, Patagonia, Argentina." PloS One, vol. 10, no. 2, 2015, pp. e0118100.
Holwerda FM, Pol D, Rauhut OW. Using dental enamel wrinkling to define sauropod tooth morphotypes from the Cañadón Asfalto Formation, Patagonia, Argentina. PLoS One. 2015;10(2):e0118100.
Holwerda, F. M., Pol, D., & Rauhut, O. W. (2015). Using dental enamel wrinkling to define sauropod tooth morphotypes from the Cañadón Asfalto Formation, Patagonia, Argentina. PloS One, 10(2), e0118100. https://doi.org/10.1371/journal.pone.0118100
Holwerda FM, Pol D, Rauhut OW. Using Dental Enamel Wrinkling to Define Sauropod Tooth Morphotypes From the Cañadón Asfalto Formation, Patagonia, Argentina. PLoS One. 2015;10(2):e0118100. PubMed PMID: 25692466.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Using dental enamel wrinkling to define sauropod tooth morphotypes from the Cañadón Asfalto Formation, Patagonia, Argentina. AU - Holwerda,Femke M, AU - Pol,Diego, AU - Rauhut,Oliver W M, Y1 - 2015/02/18/ PY - 2014/09/01/received PY - 2015/01/07/accepted PY - 2015/2/19/entrez PY - 2015/2/19/pubmed PY - 2016/1/26/medline SP - e0118100 EP - e0118100 JF - PloS one JO - PLoS One VL - 10 IS - 2 N2 - The early Middle Jurassic is regarded as the period when sauropods diversified and became major components of the terrestrial ecosystems. Not many sites yield sauropod material of this time; however, both cranial and postcranial material of eusauropods have been found in the Cañadón Asfalto Formation (latest Early Jurassic-early Middle Jurassic) in Central Patagonia (Argentina), which may help to shed light on the early evolution of eusauropods. These eusauropod remains include teeth associated with cranial and mandibular material as well as isolated teeth found at different localities. In this study, an assemblage of sauropod teeth from the Cañadón Asfalto Formation found in four different localities in the area of Cerro Condor (Chubut, Argentina) is used as a mean of assessing sauropod species diversity at these sites. By using dental enamel wrinkling, primarily based on the shape and orientation of grooves and crests of this wrinkling, we define and describe three different morphotypes. With the exception of one taxon, for which no cranial material is currently known, these morphotypes match the local eusauropod diversity as assessed based on postcranial material. Morphotype I is tentatively assigned to Patagosaurus, whereas morphotypes II and III correspond to new taxa, which are also distinguished by associated postcranial material. This study thus shows that enamel wrinkling can be used as a tool in assessing sauropod diversity. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/25692466/Using_dental_enamel_wrinkling_to_define_sauropod_tooth_morphotypes_from_the_Ca��ad��n_Asfalto_Formation_Patagonia_Argentina_ DB - PRIME DP - Unbound Medicine ER -