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The Mylagaulidae or mylagaulids are a prehistoric family of sciuromorph rodents. They are known from the Neogene of North America and China.〔McKenna & Bell (1997)〕 The oldest member is the Late Oligocene ''Trilaccogaulus montanensis'' from living some 29 million years ago (Mya), and the youngest was ''Ceratogaulus hatcheri''—formerly in ''Epigaulus''—which was found barely into the Pliocene, some 5 Mya.〔Hopkins (2005)〕 ==Systematics== Three subfamilies are recognized. The taxonomy of ''Galbreathia'' is not resolved; it might belong in Mylagaulinae, but lacks the characteristic apomorphies.〔 Promylagaulinae *Genus ''Crucimys'' *Genus ''Promylagaulus'' *Genus ''Trilaccogaulus'' *Genus ''Simpligaulus'' Mesogaulinae *Genus ''Mesogaulus'' - includes ''Mylagaulodon'' Mylagaulinae *Genus ''Alphagaulus'' (paraphyletic〔) *Genus ''Ceratogaulus'' - includes ''Epigaulus'' *Genus ''Hesperogaulus'' *Genus ''Mylagaulus'' *Genus ''Pterogaulus'' *Genus ''Umbogaulus'' ''incertae sedis'' * Genus ''Galbreathia'' - basal in Mylagaulinae? 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「Mylagaulidae」の詳細全文を読む スポンサード リンク
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