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

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概要

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• 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.Described species include three new species, Munseyella setouchiensis sp. nov., Hanaiborchella reticularitriangularis sp. nov., and Trachyleberis awajiensis sp. nov.

• 日本古生物学会の論文

日本古生物学会 | 論文

• 多変量解析を用いた化石ウチムラサキガイ (マルスダレガイ科) の殻形態の解析とその古生物学的意義
• 鮮新統池子層のシロウリガイ類群集の種組成, 産状とタフォノミー
• 南部フォッサマグナ地域の新第三紀貝化石群
• 本州沖黒潮流軸部に生息する現生浮遊性有孔虫の深度分布とその季節変化
• 新生代の哺乳類進化と絶滅事変

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