Data/hora: 09/06/2024 06:28:07

Provedor de dados: 	84	
País: 	Brazil	
Título: 	Biomechanical comments about Triassic dinosaurs from Brazil	
Autores: 	Delcourt,Rafael; Azevedo,Sergio Alex Kugland de; Grillo,Orlando Nelson; Deantoni,Fernanda Oliveira.	
Data: 	2012-01-01	
Ano: 	2012	
Palavras-chave: 	Dinosaurs; Triassic; Biomechanics; Articulation; Mass.	
Resumo: 	Triassic dinosaurs of Brazil are found in Santa Maria and Caturrita formations, Rio Grande do Sul state, Brazil. There are three species known from the Santa Maria Formation (Staurikosaurus pricei, Saturnalia tupiniquim and Pampadromaeus barberenai), and two from Caturrita Formation (Guaibasaurus candelariensis and Unaysaurus tolentinoi). These dinosaur materials are, for the most part, well preserved and allow for descriptions of musculature and biomechanical studies. The lateral rotation of the Saturnalia femur is corroborated through calculations of muscle moment arms. The enhanced supracetabular crest of Saturnalia, Guaibasaurus, Staurikosaurus, Herrerasaurus ischigualastensis, Efraasia minor and Chormogisaurus novasi suggests that basal dinosaurs may have maintained an inclination of the trunk at least 20º on the horizontal axis. The pectoral girdle articulation of basal sauropodomorphs (Saturnalia and Unaysaurus) was established using a new method, the Clavicular Ring, and the scapular blade remains near 60º on the horizontal axis. This is a plesiomorphic condition among sauropodomorphs and is also seen in the articulated plateosauridae Seitaad ruessi. The Brazilian basal dinosaurs were lightweight with a body mass estimated around 18.5 kg for Staurikosaurus, 6.5 kg for Saturnalia, and 17 kg for Guaibasaurus. Pampadromaeus probably weighed 2.5 kg, but measures of its femur are necessary to confirm this hypothesis. The Triassic dinosaurs from Brazil were diversified but shared some functional aspects that were important in an evolutionary context.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492012002900001	
Editor: 	Museu de Zoologia da Universidade de São Paulo	
Relação: 	10.1590/S0031-10492012002900001	
Formato: 	text/html	
Fonte: 	Papéis Avulsos de Zoologia  v.52 n.29 2012	
Fonte: 	info:eu-repo/semantics/openAccess