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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Glacialisaurus ： ウィキペディア英語版 Glacialisaurus ''Glacialisaurus'' is a genus of massospondylid sauropodomorph dinosaur. It lived during the Early Jurassic period in what is now central Transantarctic Mountains of Antarctica. It is known from the holotype FMNH PR1823, a partial hind limb (foot) and from the referred material FMNH PR1822, a left femur. It was discovered and collected in the tuffaceous siltstones and mudstones of the lower part of the Hanson Formation, in Mount Kirkpatrick. It was first named by Nathan Smith and Diego Pol in 2007 and the type species is ''Glacialisaurus hammeri''. The generic name, ''Glacialisaurus'', is derived from the Latin word ''glacialis'', meaning "icy" or "frozen", in reference to the Beardmore Glacier region in the Central Transantarctic Mountains, where the fossil remains were found. The specific name, ''G. hammeri'', honors Dr. William R. Hammer of Augustana College, who made major contributions to both paleontology and Antarctic research.〔 In their phylogenetic analysis of the relationships of ''Glacialisaurus'', Smith and Pol found that it is a massospondylid, a non-eusauropod sauropodomorph more advanced than other forms such as ''Saturnalia'' and ''Plateosaurus''. Features of its foot are similar to ''Lufengosaurus'' (from the Early Jurassic of China), and the phylogenetic study suggests that ''Lufengosaurus'' may have been a close relative of ''Glacialisaurus'', whereas other massospondylids such as ''Coloradisaurus'' and ''Massospondylus'' found to be more basal forms.〔 Recent cladistic analyses by Yates (2007), Yates ''et al.'' (2010, 2011) and Novas ''et al.'' (2011) found the same results. The discovery of ''Glacialisaurus'' is important to the study of the early distribution of sauropod dinosaurs. The presence of this primitive sauropodomorph in the Hanson Formation (which has also yielded remains attributed to true sauropods) shows that both primitive and advanced members of this lineage existed side by side in the early Jurassic Period.〔 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Glacialisaurus」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.