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Holasteroida is an order of sea urchins. == List of families == According to World Register of Marine Species : * Family Hemipneustidae (Lambert, 1917) † * * genus ''Hemipneustes'' L. Agassiz, 1835 † * * genus ''Medjesia'' Jeffery, 1997 † * * genus ''Opisopneustes'' Gauthier, 1889 † * * genus ''Plesiohemipneustes'' Smith & Wright, 2003 † * * genus ''Toxopatagus'' Pomel, 1883 † * Sub-order Meridosternata (Lovén, 1883) * * Infra-order Cardiasterina † * * * Family Cardiasteridae Lambert, 1917 † * * * Family Stegasteridae Lambert, 1917f † * * Family Echinocorythidae Wright, 1857 † * * Family Holasteridae Pictet, 1857 † * * * Genus ''Salvaster'' Saucède, Dudicourt & Courville, 2012 † * * Infra-order Urechinina * * * Family Calymnidae Mortensen, 1907 * * * Family Carnarechininae Mironov, 1993 * * * Family Corystusidae Foster & Philip, 1978 * * * Family Plexechinidae Mooi & David, 1996 * * * Family Pourtalesiidae A. Agassiz, 1881 * * * Family Urechinidae Duncan, 1889 * Family Pseudholasteridae (Smith & Jeffery, 2000) † * * genus ''Eoholaster'' Solovjev, 1989 † * * genus ''Giraliaster'' Foster & Philip, 1978 † * * genus ''Pseudholaster'' Pomel, 1883 † * * genus ''Taphraster'' Pomel, 1883 † * Family Stenonasteridae (Lambert, 1922) † * * genus ''Stenonaster'' Lambert, 1922 † 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「Holasteroida」の詳細全文を読む スポンサード リンク
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