The femoral anatomy of Pampadromaeus barberenai based on a new specimen from the upper triassic of Brazil
| Autor: | Sérgio Dias-da-Silva, Rodrigo Temp Müller, Max C. Langer, Sérgio Furtado Cabreira |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
010506 paleontology Autapomorphy biology Fourth trochanter Anatomy biology.organism_classification 010603 evolutionary biology 01 natural sciences Santa María Formation Condyle Lesser Trochanter Pampadromaeus Femur Type specimen ZOOLOGIA (CLASSIFICAÇÃO) General Agricultural and Biological Sciences Geology 0105 earth and related environmental sciences |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | Femora of the holotype and only previously known specimen of the early sauropodomorph Pampadromaeus barberenai are incomplete and fractured. Here, we describe a new complete femur assigned to Pampadromaeus barberenai, quarried from the same outcrop of original type specimen: ‘Janner’ site, (Carnian of the Parana Basin). It shares with the holotype of Pampadromaeus barberenai a unique combination of features: anteromedial tuber slightly posteromedially displaced; lesser trochanter proximodistally oriented with the proximal tip gently connected to the femoral shaft; fourth trochanter located on the medial margin along the mediolateral axis of the femur and with an assymetrical outline. In addition, we propose a femoral autapomorphy for Pampadromaeus barberenai: lateral condyle of the distal end of the femur extremely reduced lateromedially. Two distinct phylogenetic analyses place the new specimen as the sister-group of the Pampadromaeus barberenai type-specimen and, in one of them, they are nested within S... |
| Databáze: | OpenAIRE |
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