<紀要論文>
Some Heteromorph Ammonites from the Cretaceous of Hokkaido : Studies of the Cretaceous Ammonites from Hokkaido and Saghalien-XXXI

作成者
本文言語
出版者
発行日
収録物名
開始ページ
終了ページ
出版タイプ
アクセス権
Crossref DOI
概要 Selected twenty-one species of heteromorph ammonites from the Upper Cretaceous of Hokkaido are described, in which fourteen new species and six new genera are established. Others are redescribed to im...prove the previous knowledge. For every species the stratigraphic occurrence is precisely recorded. The described species are mostly referred to the Nostoceratidae and the Diplomoceratidae. They show greater diversities in shell characters beyond the previous conceptions. Some preliminary remarks are given about the implication of the various aberrant forms. Yet we need more and better material to arrive at a satisfactory and comprehensive conclusion on the natural history of the heteromorph groups. This paper is dedicated to Mr. Tatsuo MURAMOTO who has much assisted me in providing numerous interesting specimens for study with necessary stratigraphic information.続きを見る

本文ファイル

23_03_p303 pdf 14.3 MB 440  

詳細

PISSN
NCID
レコードID
査読有無
登録日 2015.11.11
更新日 2021.02.18

この資料を見た人はこんな資料も見ています