Radiolaria: achievement and unresolved issues: taxonomy and cytology

• Suzuki Noritoshi

  Institute of Geology and Paleontology, Graduate School of Science, Tohoku University

• Aita Yoshiaki

  Department of Geology, Faculty of Agriculture, Utsunomiya University

書誌事項

タイトル別名

• Radiolaria: achievements and unresolved issues: taxonomy and cytology
• Achievement and unsolved issues on radiolarian studies: taxonomy and cytology
• Radiolaria: Achievement and unsolved issues: Taxonomy and cytology

抄録

The essentials of the taxonomy and cytology of Radiolaria at the order level are summarized from approximately 110 papers. Living Radiolaria comprise representatives of the following orders: Acantharia, Collodaria, Spumellaria, cyrtid Nassellaria, spyrid Nassellaria and Taxopodia (=Sticholonche). This analysis is based on the most recent molecular biological and fossil data. Phaeodaria, which used to belong to the Radiolaria, belong to the Cercozoa now. Heliozoa are closer to the Cercozoa than to the Alveolata or Radiolaria. A molecular phylogenetic analysis indicates that Polycystina (including Collodaria, Spumellaria and Nassellaria) should not be treated as a monophyletic group.<br>“Polycystine” Radiolaria are characterized by the presence of axopodia, a capsular wall, and a fusule. The endoplasm consists of the Golgi bodies, mitochondria, and other organelles, whereas the ectoplasm is an alveolated reticulum with food, digestive, and perialgal vacuoles, suggesting zonal specialization. The Acantharia are characterized by the presence of a periplasmic cortex with myoneme, acting as a motile contractile plasmalemma, rather than a capsular wall. Taxopodia have thick axopodia and a thick nuclear wall instead of a capsular wall. Characteristic protoplasmic structures such as an intracapsular axopodial system and nucleus are found in “polycystine” Radiolaria, but these structures do not seem to reflect phylogenetic relationships.

収録刊行物

• Plankton and Benthos Research

  Plankton and Benthos Research 6 (2), 69-91, 2011

  日本プランクトン学会、日本ベントス学会

キーワード

• Acantharia
• Phaeodaria
• polycystine
• Radiolaria
• Taxopodia

詳細情報

• CRID: 1390282680241824896
• NII論文ID: 10029655243
• NII書誌ID: AA12130745
• DOI: 10.3800/pbr.6.69
• ISSN: 1882627X
• ISSN: 18808247
• NDL書誌ID: 11137856
• Web Site: http://id.ndl.go.jp/bib/11137856
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11137856
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可