Actinocyclus setanensis sp. nov., a new freshwater diatom from the early Miocene sediment in Setana, southwestern Hokkaido, Japan

• Tanaka Hiroyuki

  Maebashi Diatom Institute

• Nagumo Tamotsu

  Department of Biology, The Nippon Dental University

書誌事項

タイトル別名

• <i>Actinocyclus setanensis</i> sp. nov., a new freshwater diatom from the early Miocene sediment in Setana, southwestern Hokkaido, Japan

抄録

Actinocyclus setanensis sp. nov., is described from an early Miocene freshwater sediment of the Futoro Formation located in Setana Town southwestern Hokkaido, Japan. The species has a relatively small round valve face with radial to vague fasciculate areolae rows, pseudonodulus located on valve face/mantle boundary and two to three (rare cases four) stalked rimoportulae, thick and bulged externally with small round openings. Within, we compare the differences between other related Miocene freshwater Actinocyclus taxa and propose it as a new species. The taxon is described with accompanying light and scanning electronic microscope photographs.

収録刊行物

• Diatom

  Diatom 34 (0), 42-48, 2018

  日本珪藻学会

キーワード

• <i>Actinocyclus setanensis</i>
• fossil
• freshwater diatom
• Miocene
• Setana

詳細情報

• CRID: 1390564238073460608
• NII論文ID: 130007586700
• NII書誌ID: AA11130739
• DOI: 10.11464/diatom.34.42
• ISSN: 21868565
• ISSN: 09119310
• NDL書誌ID: 030080193
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I030080193
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可