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Pelvic and hind limb musculature of Staurikosaurus pricei (Dinosauria: Saurischia).
An Acad Bras Cienc. 2011 Mar; 83(1):73-98.AA

Abstract

The study of pelvic and hind limb bones and muscles in basal dinosaurs is important for understanding the early evolution of bipedal locomotion in the group. The use of data from both extant and extinct taxa placed into a phylogenetic context allowed to make well-supported inferences concerning most of the hind limb musculature of the basal saurischian Staurikosaurus pricei Colbert, 1970 (Santa Maria Formation, Late Triassic of Rio Grande do Sul, Brazil). Two large concavities in the lateral surface of the ilium represent the origin of the muscles iliotrochantericus caudalis plus iliofemoralis externus (in the anterior concavity) and iliofibularis (in the posterior concavity). Muscle ambiens has only one head and originates from the pubic tubercle. The origin of puboischiofemoralis internus 1 possibly corresponds to a fossa in the ventral margin of the pré-acetabular iliac process. This could represent an intermediate stage prior to the origin of a true pré-acetabular fossa. Muscles caudofemorales longus et brevis were likely well developed, and Staurikosaurus is unique in bearing a posteriorly projected surface for the origin of caudofemoralis brevis.

Authors+Show Affiliations

Departamento de Geologia e Paleontologia, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, Rio de Janeiro, RJ, Brazil. ongrillo@gmail.comNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

21437376

Citation

Grillo, Orlando N., and Sergio A K. Azevedo. "Pelvic and Hind Limb Musculature of Staurikosaurus Pricei (Dinosauria: Saurischia)." Anais Da Academia Brasileira De Ciencias, vol. 83, no. 1, 2011, pp. 73-98.
Grillo ON, Azevedo SA. Pelvic and hind limb musculature of Staurikosaurus pricei (Dinosauria: Saurischia). An Acad Bras Cienc. 2011;83(1):73-98.
Grillo, O. N., & Azevedo, S. A. (2011). Pelvic and hind limb musculature of Staurikosaurus pricei (Dinosauria: Saurischia). Anais Da Academia Brasileira De Ciencias, 83(1), 73-98.
Grillo ON, Azevedo SA. Pelvic and Hind Limb Musculature of Staurikosaurus Pricei (Dinosauria: Saurischia). An Acad Bras Cienc. 2011;83(1):73-98. PubMed PMID: 21437376.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pelvic and hind limb musculature of Staurikosaurus pricei (Dinosauria: Saurischia). AU - Grillo,Orlando N, AU - Azevedo,Sergio A K, PY - 2010/01/15/received PY - 2010/06/21/accepted PY - 2011/3/26/entrez PY - 2011/3/26/pubmed PY - 2011/10/1/medline SP - 73 EP - 98 JF - Anais da Academia Brasileira de Ciencias JO - An Acad Bras Cienc VL - 83 IS - 1 N2 - The study of pelvic and hind limb bones and muscles in basal dinosaurs is important for understanding the early evolution of bipedal locomotion in the group. The use of data from both extant and extinct taxa placed into a phylogenetic context allowed to make well-supported inferences concerning most of the hind limb musculature of the basal saurischian Staurikosaurus pricei Colbert, 1970 (Santa Maria Formation, Late Triassic of Rio Grande do Sul, Brazil). Two large concavities in the lateral surface of the ilium represent the origin of the muscles iliotrochantericus caudalis plus iliofemoralis externus (in the anterior concavity) and iliofibularis (in the posterior concavity). Muscle ambiens has only one head and originates from the pubic tubercle. The origin of puboischiofemoralis internus 1 possibly corresponds to a fossa in the ventral margin of the pré-acetabular iliac process. This could represent an intermediate stage prior to the origin of a true pré-acetabular fossa. Muscles caudofemorales longus et brevis were likely well developed, and Staurikosaurus is unique in bearing a posteriorly projected surface for the origin of caudofemoralis brevis. SN - 1678-2690 UR - https://www.unboundmedicine.com/medline/citation/21437376/Pelvic_and_hind_limb_musculature_of_Staurikosaurus_pricei__Dinosauria:_Saurischia__ L2 - https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100005&lng=en&nrm=iso&tlng=en DB - PRIME DP - Unbound Medicine ER -