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Crown jellyfishes are the six families of true jellyfish that belong to the order Coronatae.〔Daly, Brugler, Cartwright, Collins, Dawson, Fautin, France, McFadden, Opresko, Rodriguez, Romano & Stake (2007). ''(The phylum Cnidaria: A review of phylogenetic patterns and diversity 300 years after Linnaeus. )'' Zootaxa 1668: 127–182〕 They are distinguished from other jellyfish by the presence of a deep groove running around the umbrella, giving them the crown shape from which they take their name. Many of the species in the order inhabit deep sea environments. ==Families== , there were 47 recognized extant species in Coronatae.〔 These belong in the following six families:〔〔 * Atollidae Bigelow, 1913 -- 1 genus * Atorellidae -- 2 genera * Linuchidae -- 2 genera * Nausithoidae (Claus, 1883) -- 3 genera * Paraphyllinidae -- 1 genus * Periphyllidae -- 4 genera Image:Atolla wyvillei (Operation Deep Scope 2004).jpg|''Atolla wyvillei'' Image:Medusae of world-vol03 fig352-353 Nausithoë punctata.jpg|''Nausithoe punctata'' Image:Haeckel Peromedusae.jpg|''Periphylla periphylla'' 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「Crown jellyfish」の詳細全文を読む スポンサード リンク
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