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| name = ''Spirorbis'' | image =Spirorbis_spirorbis_Scotland.jpg | image_width = 220px | image_caption = ''Spirorbis spirorbis'' (modern) | regnum = Animalia | phylum = Annelida | classis = Polychaeta | ordo = Canalipalpata | subordo = Sabellida | familia = Serpulidae | genus = ''Spirorbis'' | genus_authority = Daudin, 1800 | subdivision_ranks = Species | subdivision = ''see text'' }} ''Spirorbis'' is a genus of very small (2-5mm) polychaete worms, usually with a white coiled shell. Members of the genus live in the lower littoral and sublittoral zones of rocky shores. ''Spirorbis'' worms usually live attached to seaweeds, but some species live directly on rocks, shells or other hard substrates. ''Spirorbis'' was once thought to have a fossil record extending back into the Early Paleozoic, but now all pre-Cretaceous spirorbins are known to be microconchids. The earliest members of genus appeared in the Miocene, but Oligocene finds may also be possible. The genus contains the following species: * ''Spirorbis borealis'' Daudin, 1800 * ''Spirorbis corallinae'' De Silva and Knight-jones, 1962 * ''Spirorbis cuneatus'' Gee, 1964 * ''Spirorbis granulatus'' * ''Spirorbis incongruus'' * ''Spirorbis inornatus'' L'hardy and Quievreux, 1962 * ''Spirorbis knightjonesi'' Desilva, 1965 * ''Spirorbis lineatus'' * ''Spirorbis marioni'' (Caullery and Mesnil, 1897) * ''Spirorbis medius'' * ''Spirorbis moerchi'' * ''Spirorbis nakamurai'' * ''Spirorbis quadrangularis'' * ''Spirorbis quasimilitaris'' Bailey, 1970 * ''Spirorbis rupestris'' Gee and Knight-jones, 1962 * ''Spirorbis semidentatus'' * ''Spirorbis similis'' * ''Spirorbis spirorbis'' (Linnaeus, 1758) * ''Spirorbis steueri'' Sterzinger, 1909 * ''Spirorbis tridentata'' Levinsen, 1883 * ''Spirorbis variabilis'' * ''Spirorbis violaceus'' ==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「Spirorbis」の詳細全文を読む スポンサード リンク
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