Data/hora: 02/06/2024 05:20:30

Provedor de dados: | 42
País: | Brazil
Título: | Are the dinosauromorph femora from the Upper Triassic of Hayden Quarry (New Mexico) three stages in a growth series of a single taxon?
Autores: | MÜLLER,RODRIGO T.
Data: | 2017-06-01
Ano: | 2017
Palavras-chave: | Chinle Formation; Dinosauria; Dinosauriformes; Lagerpetidae; Norian; Ontogeny.
Resumo: | ABSTRACT The lagerpetid Dromomeron romeri and the theropod Tawa hallae are two dinosauromorphs from the Norian (Upper Triassic) of the Chinle Formation, situated in New Mexico, USA. However, a recent study suggests the inclusion of the holotype of D. romeri (GR 218) and paratype (GR 155) and referred (GR 235) specimens of T. hallae in an ontogenetic series of a single species. The specimens GR 218 and GR 155 include just an isolated femur, while GR235 includes femora, pelvis and tail. The inclusion of the specimens in an unique ontogenetic series relies on the putative immature condition and plastic deformation of the specimen GR 218. However, as observed here, the disparity between the femora of D. romeri and T. hallae is considerably higher than those expected from the ontogenetic variance in dinosauromorphs. In addition, D. romeri shares an unique suite of traits with Dromomeron gigas, a species known from a mature specimen. Therefore, the high disparity between D. romeri and T. hallae, lack of traits shared solely between the three femora, and a suite of traits shared between D. romeri and D. gigas, precludes the inclusion of the three femora from Hayden Quarry in a growth series of a single taxon.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300835
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201720160583
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.89 n.2 2017
Fonte: | info:eu-repo/semantics/openAccess