…the order Ceratitida, which showed remarkable adaptive radiation during the Triassic and underwent a wide variety of differentiation and development among ammonites. The representative genus is Ceratites , and it is important as an index fossil. The sutures have unique characteristics, with a mountain in the center of the ventral valley and a spatula-shaped valley on the dorsal side, which is usually bifurcated at the tip. … *Some of the terminology explanations that mention "Ceratites" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…アンモナイト類の中で三畳紀に著しい適応放散を示し,多種多様の分化発達をなしたセラタイト目Ceratitidaのこと。代表属はセラティテスCeratitesで,示準化石として重要である。縫合線に独特の特徴が見られ,腹面の谷の中央に山があり,背面の谷は通例へら状で先端が二分している。… ※「Ceratites」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 |
>>: Ceratias holboelli (English spelling) Ceratiasholboelli
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