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Hirudo is a genus of leeches of the family Hirudinidae. It was described by Linnaeus in 1758.〔(【引用サイトリンク】title=ITIS standard report: Hirudo (Linnaeus, 1758) )〕 There are two well-accepted species within the genus: * ''Hirudo medicinalis'' Linnaeus, 1758 * ''Hirudo nipponia'' Whitman, 1886 Three other species, previously synonymized with ''Hirudo medicinalis'', were described in 2005 and are gaining acceptance:〔 * ''Hirudo verbana'' * ''Hirudo orientalis'' * ''Hirudo troctina'' ==Distribution== ''Hirudo medicinalis'': Britain and southern Norway to the southern Urals, probably as far as the Altai Mountains (the deciduous arboreal zone)〔 ''Hirudo verbana'': Switzerland and Italy to Turkey and Uzbekistan (the Mediterranean and sub-boreal steppe zone)〔 ''Hirudo orientalis'': Transcaucasian countries, Iran, and Central Asia (mountainous areas in the sub-boreal eremial zone)〔 ''Hirudo troctina'': North-western Africa and Spain (Mediterranean zone)〔 ''Hirudo nipponia'': East Asia, including Far East district in Russian, Japan, Korea, China, Mongolia, Ryukyu Islands and Taiwan〔(【引用サイトリンク】 work = BiotaTaiwanica Citellates )〕 ''H. verbana'' is further divided into non-overlapping Eastern and Western phylogroups. 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「Hirudo」の詳細全文を読む スポンサード リンク
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