Molluscan shell microstructure in search of novel nano-scale phylogenetic characters

• Project/Area Number: 24654167
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Stratigraphy/Paleontology
• Research Institution: The University of Tokyo
• Principal Investigator: SASAKI Takenori 東京大学, 総合研究博物館, 准教授 (70313195)
• Co-Investigator(Kenkyū-buntansha): KOGURE Toshihiro 東京大学, 理学系研究科, 准教授 (50282728) ; ENDO Kazuyoshi 東京大学, 理学系研究科, 教授 (80251411)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 微細構造 / 軟体動物 / 貝殻 / バイオミネラル / 貝殻微細構造

Outline of Final Research Achievements

Molluscan shell microstructures were observed and compared in detail across various taxonomic groups. Phylogenetic correspondence is evaluated between molecular phylogenetic trees and taxonomic distribution of microstructures. Each microstructure is characterized by a combination of electron microscopy, distinction of aragonite and calcite, and crystallographic analysis.

Research Products

• [Journal Article] Twin density of aragonite in molluscan shells characterized using X-ray diffraction and transmission electron microscopy (2014)
  • Author(s): Kogure, T., Suzuki, M., Kim, H., Mukai, H., Checa, A. G., Sasaki, T. & Nagasawa, H
  • Journal Title: Journal of Crystal Growth Volume: in press
  • Peer Reviewed
• [Journal Article] Shell microstructures of five Recent solemyids from Japan (Mollusca: Bivalvia: Protobranchia) (2013)
  • Author(s): Sato, K., Nakashima, R., Majima, R., Watanabe, H. & Sasaki, T.
  • Journal Title: Paleontological Research Volume: 17 Pages: 69-90
  • Peer Reviewed
• [Journal Article] A new species of Solemya (Bivalvia: Protobranchia: Solemyidae) from a hydrothermal vent in the Iheya Ridge in the mid-Okinawa Trough, Japan. (2013)
  • Author(s): Sato, K., Watanabe, H. & Sasaki, T.
  • Journal Title: The Nautilus Volume: 127 Pages: 93-100
  • Peer Reviewed
• [Journal Article] Shell microstructures of five Recent solemyids from Japan (Mollusca: Bivalvia: Protobranchia). (2013)
  • Author(s): Sato, K., Nakashima, R., Majima, R., Watanabe, H. & Sasaki, T.
  • Journal Title: Paleontological Research Volume: 17 Pages: 69-90
  • Peer Reviewed
• [Journal Article] Seasonal changes in shell microstructures of the bloody clam, Scapharca broughtonii (Mollusca: Bivalvia: Arcidae). (2012)
  • Author(s): Nishida, K., Ishimura, T., Suzuki, A. & Sasaki, T
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 363 Pages: 99-108
  • Peer Reviewed
• [Presentation] 異鰓類(軟体動物門腹足綱)の貝殻微細構造の比較 (2014)
  • Author(s): 佐々木猛智・村中貴・茶木歩
  • Organizer: 第 9 回バイオミネラリゼーションワークショップ
  • Place of Presentation: 東京大学大気海洋研究所（千葉県柏市）
  • Year and Date: 2014-12-12
• [Presentation] 原鰓類(軟体動物:二枚貝綱)における貝殻微細構造の進化 (2014)
  • Author(s): 佐藤圭・佐々木猛智
  • Organizer: 第 9 回バイオミネラリゼーションワークショップ
  • Place of Presentation: 東京大学大気海洋研究所（千葉県柏市）
  • Year and Date: 2014-12-12
• [Presentation] 二枚貝類原鰓亜綱における貝殻微細構造の分類形質としての検討 (2014)
  • Author(s): 佐藤圭・佐々木猛智
  • Organizer: 日本古生物学会
  • Place of Presentation: 九州大学総合研究博物館（福岡県福岡市）
  • Year and Date: 2014-06-28
• [Presentation] ミクロな新規形質の探索：貝殻微細構造に注目して
  • Author(s): 佐々木猛智・佐藤 圭・酒井理恵・西田 梢
  • Organizer: 日本動物分類学会
  • Place of Presentation: 宮城教育大学