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''Urosaurus'' is a genus of lizards, commonly known as tree lizards or brush lizards, belonging to the New World iguanian family Phrynosomatidae. Species in the genus ''Urosaurus'' can be distinguished from members of the genus ''Sceloporus'' by the presence of a gular (under neck) fold and granular lateral scales. They can be distinguished from members of the genus ''Uta'' by the presence of enlarged (sometimes only slightly) dorsal scales. ''Urosaurus'' have been used as a model system in lizard life-history studies, and populations produce two or more clutches of eggs per year. Field studies have also shown a cost of reproduction in a natural New Mexico population of the species ''Urosaurus ornatus''. ==Species== There are nine species: * ''Urosaurus auriculatus'' (Cope, 1871) * ''Urosaurus bicarinatus'' (A.M.C. Duméril, 1856) * ''Urosaurus clarionensis'' (Townsend, 1890) * ''Urosaurus gadovi'' (Schmidt, 1921) * ''Urosaurus graciosus'' Hallowell, 1854 * ''Urosaurus irregularis'' (Fischer, 1881) * ''Urosaurus lahtelai'' Rau & Loomis, 1977 * ''Urosaurus nigricaudus'' (Cope, 1864) * ''Urosaurus ornatus'' (Baird & Girard, 1852) 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「Urosaurus」の詳細全文を読む スポンサード リンク
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