A new basal sauropodomorph dinosaur from the Early Jurassic of South Africa
| Autor: | Adam M. Yates, Johann Neveling, Matthew F. Bonnan |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Journal of Vertebrate Paleontology. 31:610-625 |
| ISSN: | 1937-2809 0272-4634 |
| DOI: | 10.1080/02724634.2011.560626 |
| Popis: | A new basal sauropodornorph dinosaur, Arcusaurus pereirabdalorum, sp. nov., is named and described on the basis of a partial, disarticulated but associated skull and dispersed cranial and postcranial elements from at least two individuals. Arcusaurus is part of a distinctive local fauna from the upper Elliot Formation (Lower Jurassic) in the Senekal District, Free State, South Africa. It can be diagnosed by various details of the premaxilla, nasal, and dentary in the skull and the shape of the distal caudal vertebrae. The taxon displays an unusual mix of characteristics. It lacks several synapomorphies of Plateosauria (Phteosaurus + Massospondylus and all descendants of their most recent common ancestor) but does display other derived characteristics that are otherwise known only from less inclusive clades within Plateosauria. In a cladistic analysis a position outside Plateosauria as the sister group of the clade of Efraasia + more-derived sauropodomorphs is supported; however, this position was... |
| Databáze: | OpenAIRE |
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