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J-GLOBAL ID：200902102531926659   Reference number：97A0592207

A cyclic mode of shell growth and its implications in a Late Cretaceous heteromorph ammonite Polyptychoceras pseudogaultinum (Yokoyama).

後期白亜紀異形アンモナイトPolyptychoceras pseudogaultinum (Yokoyama)の殻成長の輪生形態とその意義

Author (2)： OKAMOTO T ,  SHIBATA M
Material： Paleontological Research  (Paleontological Res)
Volume： 1  Issue： 1  Page： 29-46  Publication year： Apr. 1997 
JST Material Number： G0228B  ISSN： 1342-8144  Document type： Article
Article type： 原著論文  Country of issue： Japan (JPN)  Language： ENGLISH (EN)

Thesaurus term： Cretaceous Period ,...
Semi thesaurus term： Polyptychoceras pseudogaultinum ,...

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JST classification (1)： Mesozoic  (DE03030R)

Reference (26)：

• BANDEL, K. Microornament on early whorls of Mesozoic ammonites : implications for early ontogeny. Journal of Paleontology. 1982, 56, 2, 386-391
• DOGUZHAEVA, L. Ptychoceras-a heteromorphic Iytoceratid with truncated shell and modified ultrastructure(Mollusca : Ammonoidea). Palaeontographica A. 1989, 208, 91-121
• DOGUZHAEVA, L. Structural features in Cretaceous ammonoids indicative of semi-internal or internal shells. "The Ammonoidea : Environment, Ecology and Evolutionary Change" Systematics Association. 1993, 47, 99-114
• HAYAKAWA, K. Early shell morphology of Polyptychoceras(a Cretaceous heteromorph ammonite). Abstracts of the 1988 Annual Meeting of the Palaeontological Society of Japan. 1988, 53
• HOWARTH, M. K. Cretaceous ammonites and nautiloids from Angola. Bulletin of the British Museum(Natural History), Geology. 1965, 10, 10, 337-412

Terms in the title (5)： 後期白亜紀 ,  アンモナイト ,  殻 ,  成長 ,  形態