…A general term for the echinoderms belonging to the order Isocrinida, a class of crinoids. All of them live in the sea. They flourished since their appearance in the Ordovician period of the Paleozoic era, but their numbers declined during the Mesozoic era, and only a few species survive today. *Some of the terminology explanations that mention "Isocrinida" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…海百合綱ウミユリ目Isocrinidaに属する棘皮(きよくひ)動物の総称。すべて海産で,古生代のオルドビス紀に出現して以来,非常に繁栄したが,中生代から衰え,現在では少数種のみが生き残っている。… ※「Isocrinida」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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