A New Gaudryceratine Ammonite from the Cenomanian of Hokkaido : Studies of the Cretaceous Ammonites from Hokkaido and Saghalien-XXV - Collections

＜departmental bulletin paper＞
A New Gaudryceratine Ammonite from the Cenomanian of Hokkaido : Studies of the Cretaceous Ammonites from Hokkaido and Saghalien-XXV

Creator	Creator Name Matsumoto, Tatsuro 松本, 達郎マツモト, タツロウ Affiliation Affiliation Name Faculty of Science, Kyushu University 九州大学理学部
	Creator Name Muramoto, Tatsuo 村本, 辰雄ムラモト, タツオ Affiliation Affiliation Name Mikasa Kaseki Dokokai 三笠化石同好会
	Creator Name Takahashi, Takemi 高橋, 武美タカハシ, タケミ Affiliation Affiliation Name Mikasa Kaseki Dokokai 三笠化石同好会
Language	English
Publisher	Faculty of Science, Kyushu University
Publisher	九州大学理学部
Date	1972-12-25
Source Title	Memoirs of the Faculty of Science, Kyūsyū University. Series D, Geology
Vol	21
Issue	2
First Page	207
Last Page	215
Publication Type	Version of Record
Access Rights	open access
Crossref DOI	https://doi.org/10.5109/1544093
Abstract	A new species is established on a number of specimens from the Lower Cenomanian (zone of Mantelliceras japonicum) of the Ikushumbets area. It is referred to a new subgenus of Kossmatella, together wit...h allied species from the Pacific Coast of North America, K. filicinctum (WHITEAVES) and K. cappsi IMLAY. The new subgenus is characterized by the Kossmatella type ribs and constrictions on the inner whorls of 10-15 mm, infrequent and indistinct appearance of such ribs in the middle growth-stages and again prominent fold ribs and furrows on the probably adult outer whorl. The intimate relationships of Kossmatella with Eogaudryceras and Anagaudryceras are discussed.show more

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