直角石およびアンモノイド類の殼構造 : その頭足類分類の意義

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概要

• 論文の詳細を見る

• SEM observations on orthocerid and ammonoid shell structure are described. The systematic position of the orthocerid cephalopods, all of which in the past had often been referred to the Nautiloidea, is discussed. "Orthocerida" with a capshaped first chamber are referred to the superorder Pseudorthoceratoidea (subclass Nautilomorphi). "Orthocerida" with an ammonoid type of early ontogenesis are named Michelinoceratoidea (subclass Coleoidea). Trematoceratidae n. fam. is described.

• 国立科学博物館の論文

著者

• Zakharov Yuri

  Far East Geological Institute Far Eastern Branch Russian Academy Of Sciences

関連論文

• Middle Permian ammonoids from the Takakurayama area, Abukuma Mountains, northeast Japan, and their stratigraphical significance
• 直角石およびアンモノイド類の殼構造 : その頭足類分類の意義

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