…A general term for mollusks belonging to the class Cephalopoda, including squids, octopuses, ammonites, and nautiluses. From [Mollusks]…They appeared in the Ordovician period of the Paleozoic Era, and there are 25,000 species in the world, 1,500 in Japan. (7) Cephalopoda Class: Squid, octopus, and nautilus. The body is arranged in the order of trunk, head, and legs, and the trunk is large with a fleshy mantle, and the internal organs are contained within it. … *Some of the terminology that mentions "Cephalopoda" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…頭足綱Cephalopodaに属する軟体動物の総称。イカ,タコ類,アンモナイト,オウムガイ類を含む。… 【軟体動物】より…古生代オルドビス紀に出現し,世界に2万5000種,日本産1500種。(7)頭足綱Cephalopoda イカ・タコ・オウムガイ類をいう。体は胴,頭,足の順に並び,肉質の外套をかむった胴は大きく,内臓はこの中に入る。… ※「Cephalopoda」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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