Late Triassic ammonoid Sirenites from the Sabudani Formation in Tokushima, Southwest Japan, and its biostratigraphic and paleobiogeographic implications

Yasuyuki Tsujino, Yasunari Shigeta, Haruyoshi Maeda, Toshifumi Komatsu, Nao Kusuhashi

研究成果: Contribution to journalArticle

1 被引用数 (Scopus)

抄録

Discovery of Sirenites senticosus (Dittmar) in the upper part of the Sabudani Formation of the Kurosegawa Belt, Kito area, Tokushima Prefecture, Japan, establishes a late Early Carnian age for this part of the stratigraphic unit. Because S.senticosus was mainly distributed in the Tethyan region, its occurrence provides evidence that Late Triassic ammonoids of Japan had strong affinities with those of the Tethyan faunas. This finding clearly differs from the biogeographic distribution of contemporary bivalves in the region, which are referred to as the Kochigatani bivalve faunas, and show strong affinities to faunas of the Boreal region.

本文言語英語
ページ(範囲)549-561
ページ数13
ジャーナルIsland Arc
22
4
DOI
出版ステータス出版済み - 12 1 2013

All Science Journal Classification (ASJC) codes

  • Geology

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