Eocene ostracodes from the Iwaya Formation on Awajishima Island, southwestern Japan

• YAMAGUCHI Tatsuhiko

  Graduate School of Natural Science and Technology, Kanazawa University

• MATSUBARA Takashi

  Division of Natural History, Museum of Nature and Human Activities, Sanda

• KAMIYA Takahiro

  Graduate School of Natural Science and Technology, Kanazawa University

Abstract

The ostracode fauna from the middle-upper Eocene Iwaya Formation on Awajishima Island, Hyogo Prefecture, southwestern Japan was studied to reveal a band of the Eocene ostracode faunal spectrum in the middle latitudes of the northwestern Pacific. Based on lithofacies and previously reported calcareous nannofossils, molluscs, and benthic foraminifers, the ostracodes were found to have inhabited inner shelf environments. The ostracodes entirely differ from the Eocene-earliest Oligocene faunas in Kyushu, southwestern Japan and the East China Sea, both in generic and specific composition. The difference is considered to be due to paleoclimatic and paleogeographic differences between Awajishima Island and moresouthern latitudes at that time.<br>Described species include three new species, Munseyella setouchiensis sp. nov., Hanaiborchella reticularitriangularis sp. nov., and Trachyleberis awajiensis sp. nov.

Journal

• Paleontological Research

  Paleontological Research 9 (4), 305-318, 2005

  PALAEONTOLOGICAL SOCIETY OF JAPAN

Keywords

• Eocene
• Iwaya Formation
• Ostracoda
• paleobiogeography
• paleoecology
• taxonomy

Details

• CRID: 1390282679062587776
• NII Article ID: 130004456730
• NII Article ID: 110003479886
• NII Article ID: 210000132325
• NII Book ID: AA11137385
• DOI: 10.2517/prpsj.9.305
• ISSN: 18800068
• ISSN: 13428144
• NDL BIB ID: 7772678
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7772678
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed