A New Dicynodont (Therapsida: Anomodontia) from the Permian of Southern Brazil and Its Implications for Bidentalian Origins
| Autor: | Andréa Benitez Fermino Ilha, Christian F. Kammerer, Cesar Leandro Schultz, Marina Bento Soares, Alessandra D. S. Boos |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Teeth
Permian lcsh:Medicine Dicynodont 010502 geochemistry & geophysics 01 natural sciences Evolucao paleoambiental Geographical locations Filogenética Medicine and Health Sciences Maxilla lcsh:Science Musculoskeletal System Data Management Mammals Multidisciplinary Dentition biology Fossils Geology New Species Reports Paleozoic Era Biological Evolution medicine.anatomical_structure Geography South american Mesozoic Era Anatomy Brazil Research Article 010506 paleontology Computer and Information Sciences Triassic Period Paleontology medicine Animals Skeleton 0105 earth and related environmental sciences Taxonomy Cinodonte Bidentalia Skull lcsh:R Biology and Life Sciences Permian Period Geologic Time South America biology.organism_classification New species reports Permian period Triassic period Jaw Gondwana Earth Sciences lcsh:Q People and places Head Digestive System |
| Zdroj: | PLoS ONE, Vol 11, Iss 5, p e0155000 (2016) PLoS ONE Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS PLOS ONE, 11(5):e0155000 |
| ISSN: | 1932-6203 |
| Popis: | Dicynodonts were a highly successful group of herbivorous therapsids that inhabited terrestrial ecosystems from the Middle Permian through the end of the Triassic periods. Permian dicynodonts are extremely abundant in African deposits, but are comparatively poorly known from the other regions of Gondwana. Here we describe a new South American dicynodont, Rastodon procurvidens gen. et sp. nov., from the Boqueirão farm site of the Rio do Rasto Formation, Paraná Basin, Guadalupian/Lopingian of Brazil. Diagnostic features of R. procurvidens include uniquely anteriorly-curved maxillary tusks, well-developed ridges extending from the crista oesophagea anteriorly along the pterygoid rami, strong posterior angulation of the posterior pterygoid rami, and a bulbous, well-developed retroarticular process of the articular. Phylogenetic analysis indicates that R. procurvidens is the earliest and most basal member of Bidentalia, a cosmopolitan clade that includes Permian and Triassic dicynodonts whose dentition is usually reduced to a pair of maxillary tusks. |
| Databáze: | OpenAIRE |
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