Cephalochordata
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…About 2,500 species are known. Protochordates are divided into two classes, Urochordata and Cephalochordata, based on the condition of the notochord. Urochordata includes four orders: Ascidiacea, Thaliacea, Appendicularia, and Pyrosomata. … *Some of the terminology explanations that mention "Cephalochordata" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
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…約2500種が知られている。 原索動物は脊索の状態によって尾索類Urochordataと頭索類Cephalochordataの2綱に分けられる。尾索類にはホヤ目Ascidiacea，サルパ目(タリア目)Thaliacea，尾虫目(オタマボヤ目)Appendicularia，火体目(ヒカリボヤ目)Pyrosomataの4目が含まれる。… ※「Cephalochordata」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 |
>>: Cephalocereus senilis (English spelling) Cephalocereus senilis
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