First occurence of Haugia cf. variabilis (d'Orbigny) (Ammonoidea) from the Lower Jurassic of the Uminoura area, western Kyushu, Japan

Ryoji Wani, Tohru Ohta, Hiromichi Hirano

Research output: Contribution to journalArticle

Abstract

Haugia cf. variabilis (d'Orbigny) has been found in the upper part of the Idenohana Formation in the Uminoura area, Kumamoto Prefecture. This species is originally known from the Upper Toarcian H. variabilis Subzone of the Lytoceras jurense Zone in western Europe. This occurrence combined with our analyses of the lithofacies and sequence stratigraphy suggests that the Idenohana Formation is conformably overlain by the Kyodomari Formation.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalPaleontological Research
Volume8
Issue number2
DOIs
Publication statusPublished - 2004 Jun 30

Keywords

  • Ammonoid
  • Haugia
  • Idenohana Formation
  • Kyodomari Formation
  • Uminoura
  • Upper Toarcian

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Palaeontology

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