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Elaphrosaurus : ウィキペディア英語版 | Elaphrosaurus
''Elaphrosaurus'' (pron.:) is a genus of ceratosaurian theropod dinosaur that lived approximately 154 to 150 million years ago during the later part of the Jurassic Period in what is now Tanzania in Africa. ''Elaphrosaurus'' was a medium-sized, but lightly built, bipedal, carnivore, that could grow up to long. Morphologically, this dinosaur is significant in two ways. First, it has a relatively long trunk but is very shallow-chested for a theropod of its size. Second, it has very short hindlimbs when compared to its relatively long trunk. Phylogenetic analysis indicates that this genus is likely a ceratosaur, and earlier suggestions that it is a late surviving coelophysoid have been examined but generally dismissed. ==Etymology== The genus name ''Elaphrosaurus'' is derived from the Greek words ''elaphro'' (ελαφρός) meaning "light" as in "light-weight", a reference to its slender frame and "sauros" (σαυρος) meaning "lizard"; thus, "lightweight lizard". ''Elaphrosaurus'' was described and named by Werner Janensch in 1920 and the type species is ''Elaphrosaurus bambergi''.
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