Thadeosaurus

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Thadeosaurus
Temporal range: Changhsingian - Induan 253.8–249.7Ma
Tadeosaure.jpg
Restoration
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Diapsida
Clade: Neodiapsida
Family: Younginidae
Genus: Thadeosaurus
Carroll, 1981
Type species
Thadeosaurus colcanapi
Carroll, 1981

Thadeosaurus is an extinct genus of diapsid reptile belonging to the family Younginidae. Fossils have been found in Madagascar, and date to the late Permian to the early Triassic period.

Thadeosaurus was a lizard-like animal, with a remarkably long tail that comprised about two thirds of the animal's total length of 60 centimetres (2.0 ft). It also had long toes, especially on the hind legs, which would have given it a powerful stride, since the toes would still touch the ground while the foot was being raised. Coupled with a strong breast bone to increase the strength in the forelimbs, this means that Thadeosaurus was probably a good runner.[1]

Below is a cladogram from Reisz et al. (2011) showing the phylogenetic position of Thadeosaurus among other early diapsids:[2]



Captorhinidae


Diapsida

Araeoscelidia


Neodiapsida

Orovenator




Lanthanolania



Tangasauridae

Tangasaurus




Acerosodontosaurus



Hovasaurus





Younginidae

Thadeosaurus



Youngina





Claudiosaurus


Sauria

Archosauromorpha



Lepidosauromorpha










References[edit]

  1. ^ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 84. ISBN 1-84028-152-9. 
  2. ^ Robert R. Reisz, Sean P. Modesto and Diane M. Scott (2011). "A new Early Permian reptile and its significance in early diapsid evolution". Proceedings of the Royal Society B 278 (1725): 3731–3737. doi:10.1098/rspb.2011.0439. PMC 3203498. PMID 21525061.