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''Stylemys'' (meaning "pillar turtle") is the first fossil genus of dry land tortoise belonging to the order Testudines discovered in the United States. The genus lived in temperate to subtropical areas of North America, Europe, and Asia, based on fossil distribution.〔 1964 "A Redefinition of the Fossil Tortoise Genus ''Stylemys'' Leidy", ''Journal of Paleontology'' 38(2):316-324〕 The genus was first described in 1851 by Dr. Joseph Leidy. The tortoise was common in the prehistoric Badlands, especially Nebraska and South Dakota. The species has also been found in the formations in and around Badlands National Park. The ancient tortoises had primitive jaw muscles, unlike today's tortoises, which also display the ''os transiliens'' bone, and would have been herbivorous. While ''Stylemys'' species did exhibit the same neck structure as modern tortoises, the forelimbs were unsuitable for burrowing, setting them apart from modern genera. ==Species== A number of species have been described since the genus was named in 1851.〔(The Paleobiology Database )〕 *''S. botti'' *''S. calaverensis'' *''S. canetotiana'' *''S. capax'' *''S. conspecta'' *''S. copei'' *''S. emiliae'' *''S. frizaciana'' *''S. karakolensis'' *''S. nebrascensis'' (syn. ''S. amphithorax'') *''S. neglectus'' *''S. oregonensis'' *''S. pygmea'' *''S. uintensis'' *''S. undabuna'' Image:Stylemys_conspecta_01.jpg|''Stylemys conspecta'' from Tertiary in Oregon Image:Stylemys.jpg|''Stylemys nebrascensis'' shell at the Museum für Naturkunde, Berlin 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「Stylemys」の詳細全文を読む スポンサード リンク
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