日本北海道Campanian纪中期发现的异变型Ammonoid Amapondella amapondense

IF 1.3 4区地球科学 Q3 PALEONTOLOGY

Paleontological Research Pub Date : 2022-08-01 DOI:10.2517/PR210007

Y. Shigeta, Masataka Izukura

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引用次数: 0

摘要

摘要在日本北部北海道的浦川、鸟取里和Hidaka地区的Campanian中下层发现了异形菊石Amapondella amapondensed（van Hoepen），这是该分类单元在西北太平洋地区的首次报告。由于该物种在Santonian至Campanian早期在其他地区蓬勃发展，其在北海道的最终地理分布表明，在Campanian中期早期，全球环境变化可能对菊石生物地理学产生了重大影响。

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Discovery of the Heteromorph Ammonoid Amapondella amapondense in the Middle Campanian of Hokkaido, Japan

Abstract. The discovery of the heteromorph ammonoid Amapondella amapondense (van Hoepen) in the lower middle Campanian in the Urakawa, Biratori and Hidaka areas of Hokkaido, northern Japan, represents the first report of this taxon in the Northwest Pacific region. Because the species flourished in other regions during Santonian to early Campanian time, its final geographic occurrence in Hokkaido suggests that global environmental changes likely had a significant influence on ammonoid biogeography during early middle Campanian time.

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来源期刊

Paleontological Research PALEONTOLOGY-

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Paleonotological Research (PR) is a quarterly, peer-reviewed international journal, which focuses on original contributions primarily in the area of paleontology but also covering a wide range of allied sciences. It has been published since 1997 as a successor to the former journal Transactions and Proceedings of the Palaeontological Society of Japan. The emphasis of contributions will include global and local perspectives, and contents can cover all ages (Precambrian to the Quaternary, including the present time).