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''Ancotrema'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Haplotrematidae. This genus is sometimes considered to be a subgenus of ''Haplotrema''. ''Haplotrema'' and ''Ancotrema'' cannot be distinguished only on the basis of their shells, but can be distinguished on the basis of their detailed internal anatomy.〔Pilsbry, Henry A. (1946). Land Mollusca of North America (North of Mexico). Acad. Nat. Sci. Philadelphia, Monograph 3, vol. 2(1): 225-230.〕 The genus ''Ancotrema'' contains the following species:〔() Integrated Taxonomic Information System (ITIS) taxonomic database〕〔() Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online).〕 * ''Ancotrema hybridum'' (Ancey, 1888); Oregon lancetooth * ''Ancotrema sportella'' (Gould, 1846); beaded lancetooth * ''Ancotrema voyanum'' (Newcomb, 1865); hooded lancetooth * ''Ancotrema zopherum'' Roth, 1990: dusky lancetooth ==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「Ancotrema」の詳細全文を読む スポンサード リンク
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