869. SOME ABERRANT FUSULINACEANS FROM THE UPPER CARBONIFEROUS SEQUENCE OF THE AKIYOSHI LIMESTONE GROUP, SOUTHWEST JAPAN

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  • 869. 秋吉石灰岩層群上部石炭系より産する異常巻フズリナ類
  • 秋吉石灰岩層群上部石炭系より産する異常巻フズリナ類〔英文〕
  • アキヨシ セッカイガンソウグン ジョウブ セキタンケイ ヨリ サンスル イジョ

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Some aberrant lenticular fusulinaceans are found from the Upper Carboniferous sequence in the lower part of the Akiyoshi Limestone Group, Southwest Japan. These foraminifers are characterized by two different stages of growth; planispirally coiled in the early stage of growth and rectilinear in the last stage. The following species are described and discussed herein; Rectomillerella okubensis, sp. nov., R. sp. A, R. sp. B, Palaeoreichelina disvoluta, sp. nov., and P.? sp. As far as the present knowledges are concerned, it is possible that Palaeoreichelina is paleobiogeographically related to the Tethyan realm.

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