Early Tithonian (Late Jurassic) ammonite Parapallasiceras newly discovered from the Itoshiro Subgroup (Tetori Group) in the Hida Belt, northern Central Japan

被引：12
作者：
Sato, T
Yamada, T
机构：
[1] Fukada Geol Inst, Bunkyo Ku, Tokyo 1130021, Japan
[2] Natl Sci Museum, Shinjuku Ku, Tokyo 1690073, Japan
来源：
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES | 2005年 / 81卷 / 07期
关键词：
Ammonoidea; tithonian; Jurassic; Tetori Group; Parapallasiceras;
D O I：
10.2183/pjab.81.267
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Early Tithonian (Late Jurassic) ammonite Parapallasiceras cf. pseudocontiguum (Donze and Enay) was discovered in situ from the Kamihambara Formation of the Itoshiro Subgroup (Tetori Group) distributed in the Hida Belt, in Fukui Prefecture, northern Central Japan. It is a Perisphinctid characterized by polygyrate ribbing and can be compared to the said species originally described in Southeast France. The species occurs in the Lower Tithonian of the Submediterranean region. Therefore at least a part of the Itoshiro Subgroup can be dated Early Tithonian, judged by this ammonite.
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页码：267 / 272
页数：6
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