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Coelophysis rhodesiensis : ウィキペディア英語版 | Coelophysis rhodesiensis
''Coelophysis rhodesiensis'' is an extinct species of coelophysid theropod dinosaur that lived approximately 188 million years ago during the early part of the Jurassic Period in what is now Africa. The species was a small to medium-sized, lightly built, ground-dwelling, bipedal carnivore, that could grow up to long. It was formerly called ''Syntarsus'', but that name was already taken by a beetle, and was subsequently given the name ''Megapnosaurus'' by Ivie, Ślipiński & Węgrzynowicz, in 2001, though many subsequent studies have classified it in the genus ''Coelophysis''. ==Description== ''Coelophysis rhodesiensis'' measured up to 3 meters (10 ft) long from nose to tail and weighed about 32 kilograms (70 lb). The bones of 30 ''C. rhodesiensis'' individuals were found together in a fossil bed in Zimbabwe, so paleontologists think it may have hunted in packs. The various fossils attributed to this species have been dated over a relatively large time span – the Hettangian, Sinemurian, and Pliensbachian stages of the Early Jurassic – meaning the fossils represent either a highly successful genus or a few closely related animals all currently assigned to ''Coelophysis''. Specimen UCMP V128659 was discovered in 1982 and referred to ''Megapnosaurus kayentakatae'' by Rowe (1989),〔Rowe, 1989. A new species of the theropod dinosaur Syntarsus from the Early Jurassic Kayenta Formation of Arizona. Journal of Vertebrate Paleontology. 9, 125-136.〕 as a subadult gracile individual and later, Tykoski (2005)〔Tykoski, 1998. The osteology of Syntarsus kayentakatae and its implications for ceratosaurid phylogeny. Unpublished Masters Thesis, University of Texas at Austin, 217 pp.〕 agreed. Gay (2010) described the specimen as the new tetanurine taxon ''Kayentavenator elysiae'',〔Gay, 2010. Notes on Early Mesozoic theropods. Lulu Press. 44 pp.〕 but Mortimer (2010) pointed out that there was no published evidence that ''Kayentavenator'' is the same taxon as ''M. kayentakatae''.
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