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''Pristiophorus'' is a genus of sawsharks found in the Pacific, Atlantic and Indian oceans. Members of this genus differ from the Sixgill Sawshark ''(Pliotrema warreni)'' in having five gill slits. Their rostral sawteeth lack prominent transverse ridges on the basal ledges, and the large teeth are not posteriorly serrated. ==Species== There are currently seven recognized species in this genus:〔 * ''Pristiophorus cirratus'' (Latham, 1794) (Longnose sawshark) * ''Pristiophorus delicatus'' Yearsley, Last & W. T. White, 2008 (Tropical sawshark) * ''Pristiophorus japonicus'' Günther, 1870 (Japanese sawshark) * ''Pristiophorus lanae'' Ebert & Wilms, 2013 (Lana's sawshark)〔Ebert, D.A. & Wilms, H.A. (2013): (''Pristiophorus lanae'' sp. nov., a new sawshark species from the Western North Pacific, with comments on the genus ''Pristiophorus'' Müller & Henle, 1837 (Chondrichthyes: Pristiophoridae). ) Pp. 86-100 in: de Carvalho, M.R., Ebert, D.A., Ho, H.-C. & White, W.T. (eds.) : Systematics and biodiversity of sharks, rays, and chimaeras (Chondrichthyes) of Taiwan. ''Zootaxa, 3752 (1): 1–386.''〕 * ''Pristiophorus nancyae'' Ebert & Cailliet, 2011 (African dwarf sawshark)〔Ebert, D.A. & Cailliet, G.M. (2011): ''Pristiophorus nancyae'', a New Species of Sawshark (Chondrichthyes: Pristiophoridae) from Southern Africa. ''Bulletin of Marine Science, 87 (3): 501–512.''〕 * ''Pristiophorus nudipinnis'' Günther, 1870 (Shortnose sawshark) * ''Pristiophorus peroniensis'' Yearsley, Last & W. T. White, 2008 (Eastern Australian sawshark) * ''Pristiophorus schroederi'' S. Springer & Bullis, 1960 (Bahamas sawshark) 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「Pristiophorus」の詳細全文を読む スポンサード リンク
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