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The subclass Euechinoidea includes almost all living species of sea urchin, and fossil forms going back as far as the Triassic. == Taxonomy == List of orders according to World Register of Marine Species : * Infra-classis ''Acroechinoidea'' * * Order ''Aspidodiadematoida'' * * Order ''Diadematoida'' * * Order ''Micropygoida'' * * Order ''Pedinoida'' * Infra-classis ''Carinacea'' * * Super-order ''Calycina'' * * * Order ''Phymosomatoida'' † * * * Order ''Salenioida'' * * Super-order ''Echinacea'' * * * Order ''Arbacioida'' * * * Order ''Camarodonta'' * * * Order ''Stomopneustoida'' * Order ''Echinothurioida'' * Infra-classis ''Irregularia'' * * Super-order ''Atelostomata'' * * * Order ''Holasteroida'' * * * Order ''Spatangoida'' * * Order ''Echinoneoida'' * * Order ''Holectypoida'' † * * Super-order ''Neognathostomata'' * * * Order ''Cassiduloida'' * * * Order ''Clypeasteroida'' * * * Order ''Echinolampadoida'' * * * Order ''Nucleolitidae'' † File:Spatangus purpureus rob.jpg |''Spatangus purpureus'' File:Astropyga radiata2.jpg|''Astropyga radiata'' Image:Paracentrotus lividus profil.JPG|''Paracentrotus lividus'' File:Echinocyamus pusillus.jpg|''Echinocyamus pusillus'' File:Fire Urchin Asthenosoma varium.jpg|''Asthenosoma varium''. 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「Euechinoidea」の詳細全文を読む スポンサード リンク
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