Data/hora: 09/06/2024 06:40:52

Provedor de dados: | 42
País: | Brazil
Título: | Recovering missing data: estimating position and size of caudal vertebrae in Staurikosaurus pricei Colbert, 1970
Autores: | Grillo,Orlando N.; Azevedo,Sergio A.K.
Data: | 2011-03-01
Ano: | 2011
Palavras-chave: | Missing data; Caudal vertebra; Regression; Staurikosaurus pricei.
Resumo: | Missing data is a common problem in paleontology. It makes it difficult to reconstruct extinct taxa accurately and restrains the inclusion of some taxa on comparative and biomechanical studies. Particularly, estimating the position of vertebrae on incomplete series is often non-empirical and does not allow precise estimation of missing parts. In this work we present a method for calculating the position of preserved middle sequences of caudal vertebrae in the saurischian dinosaur Staurikosaurus pricei, based on the length and height of preserved anterior and posterior caudal vertebral centra. Regression equations were used to estimate these dimensions for middle vertebrae and, consequently, to assess the position of the preserved middle sequences. It also allowed estimating these dimensions for non-preserved vertebrae. Results indicate that the preserved caudal vertebrae of Staurikosaurus may correspond to positions 1-3, 5, 7, 14-19/15-20, 24-25/25-26, and 29-47, and that at least 25 vertebrae had transverse processes. Total length of the tail was estimated in 134 cm and total body length was 220-225 cm.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100004
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/S0001-37652011005000003
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.83 n.1 2011
Fonte: | info:eu-repo/semantics/openAccess