Foi publicado mais um artigo (em versão final), o terceiro neste verão de 2015, sobre dentes de dinossauros carnívoros como resultado do doutoramento de Christophe Hendrickx pela Universidade NOVA de Lisboa, desta vez sobre a dentição de dinossauros terópodes megalossauros.
É um estudo baseado em dezenas de dentes da Europa, África, América do Norte, América do Sul e Ásia. O estudo inclui dentes de Torvosaurus gurneyi do Jurássico Superoor de Portugal, em exposição no Museu da Lourinhã.
Resumo no original:
Theropod teeth are particularly abundant in the fossil record and frequently reported in the literature. Yet, the dentition of many theropods has not been described comprehensively, omitting details on the denticle shape, crown ornamentations and enamel texture. This paucity of information has been particularly striking in basal clades, thus making identification of isolated teeth difficult, and taxonomic assignments uncertain. We here provide a detailed description of the dentition of Megalosauridae, and a comparison to and distinction from superficially similar teeth of all major theropod clades. Megalosaurid dinosaurs are characterized by a mesial carina facing mesiolabially in mesial teeth, centrally positioned carinae on both mesial and lateral crowns, a mesial carina terminating above the cervix, and short to well-developed interdenticular sulci between distal denticles. A discriminant analysis performed on a dataset of numerical data collected on the teeth of 62 theropod taxa reveals that megalosaurid teeth are hardly distinguishable from other theropod clades with ziphodont dentition. This study highlights the importance of detailing anatomical descriptions and providing additional morphometric data on teeth with the purpose of helping to identify isolated theropod teeth in the future.
Hendrickx, C., Mateus, O., Araújo, R. 2015. The dentition of megalosaurid theropods. Acta Palaeontologica Polonica 60 (3): 627–642. www PDF
Este artigo já tinha sido divulgado pela APP mas sai agora em versão final.
Após o doutoramento na FCT-UNL, o Christophe está agora a fazer o pós-doutoramento na Universidade de Witwatersrand, em África do Sul.
É um estudo baseado em dezenas de dentes da Europa, África, América do Norte, América do Sul e Ásia. O estudo inclui dentes de Torvosaurus gurneyi do Jurássico Superoor de Portugal, em exposição no Museu da Lourinhã.
Resumo no original:
Theropod teeth are particularly abundant in the fossil record and frequently reported in the literature. Yet, the dentition of many theropods has not been described comprehensively, omitting details on the denticle shape, crown ornamentations and enamel texture. This paucity of information has been particularly striking in basal clades, thus making identification of isolated teeth difficult, and taxonomic assignments uncertain. We here provide a detailed description of the dentition of Megalosauridae, and a comparison to and distinction from superficially similar teeth of all major theropod clades. Megalosaurid dinosaurs are characterized by a mesial carina facing mesiolabially in mesial teeth, centrally positioned carinae on both mesial and lateral crowns, a mesial carina terminating above the cervix, and short to well-developed interdenticular sulci between distal denticles. A discriminant analysis performed on a dataset of numerical data collected on the teeth of 62 theropod taxa reveals that megalosaurid teeth are hardly distinguishable from other theropod clades with ziphodont dentition. This study highlights the importance of detailing anatomical descriptions and providing additional morphometric data on teeth with the purpose of helping to identify isolated theropod teeth in the future.
Hendrickx, C., Mateus, O., Araújo, R. 2015. The dentition of megalosaurid theropods. Acta Palaeontologica Polonica 60 (3): 627–642. www PDF
Este artigo já tinha sido divulgado pela APP mas sai agora em versão final.
Após o doutoramento na FCT-UNL, o Christophe está agora a fazer o pós-doutoramento na Universidade de Witwatersrand, em África do Sul.
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