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''Amyzon'' is an extinct genus belonging to the sucker family Catostomidae first described in 1872 by E. D. Cope. There are 4 valid species in the genus. ''Amyzon'' are found in North American fossil sites dated from the Early Eocene in Washington USA, and several Early Eocene sites in British Columbia Canada including the McAbee Fossil Beds, Driftwood Canyon, and the Horsefly Beds, as well as Early Oligocene sites in Nevada USA. == Species == There are currently four valid species included in ''Amyzon'' with up to seven species having been described. * ''A. aggregatum'' (Wilson, 1977) Early Eocene, Horsefly Beds, Horsefly, B.C. * ''A. brevipinne'' (Cope, 1894) Early Eocene, Allenby Formation, Tulameen River, near Princeton, B.C. * ''A. commune'' (Cope, 1874) late Eocene Florissant Formation, Colorado * ''A. mentale'' (Cope, 1872) Oligocene, Osino Oil Shales, Nevada * ''A. gosiutensis'' Grande, Eastman, and Cavender, 1982 Eocene Green River Formation, Wyoming, Jr synonym of ''A. aggregatum'' * ''A. pandatum'' Cope, 1874 Eocene Florissant Formation, Jr synonym of ''A. commune'' * ''A. fusiforme'' Cope, 1875 Eocene Florissant Formation, Jr synonym of ''A. commune'' 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「Amyzon (genus)」の詳細全文を読む スポンサード リンク
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