…It belongs to the suborder Rhachitomus of the order Incisive Vertebrae of the subclass Labyrinthodontia. The intervertebral core (body) of the vertebrae is wedge-shaped, and the lateral vertebrae are small and disc-shaped, with the neural arch supported between them. Rhachitomous vertebrae with this type of vertebrae flourished mainly in North America, Europe, and Africa during the Carboniferous to Triassic periods. … *Some of the terminology that mentions "rhachitomous" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…迷歯類(亜綱)の分椎(切椎)目ラキトム亜目に属する。脊椎の構成骨である間椎心(体)は楔(くさび)形で側椎心は円板状で小さく,両者の間に神経弓が支えられるような関係にあるのをラキトム型rhachitomousという。このような脊椎をもったラキトム類は,石炭紀から三畳紀までの各時代に北アメリカ,ヨーロッパ,アフリカを中心に栄えた。… ※「rhachitomous」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 |
>>: Rhacomitrium canescens (English spelling) Rhacomitrium canescens
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