Using giant sperm morphology and fossil data to unravel the evolution of cypridoidean ostracods in the Lake Biwa region.

2012 Fiscal Year Final Research Report

• Project/Area Number: 22570107
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Lake Biwa Museum
• Principal Investigator: SMITH Robin 滋賀県立琵琶湖博物館, 研究部, 主任学芸員 (70416204)
• Co-Investigator(Kenkyū-buntansha): KAMIYA Takahiro 金沢大学, 自然システム学系, 教授 (80194976)
• Project Period (FY): 2010 – 2012
• Keywords: 進化 / 化石 / カイミジンコ / 形態 / 巨大精子

Research Abstract

Our research resulted in the discovery of the shortest, longest and oldest cypridoidean sperm known, and greatly expanded the data about sperm lengths and sperm morphology in the superfamily. Our results suggest that a plesiomorphic sperm length for the superfamily may have been around 1000 microns, and sperm lengths have reduced in one group, and increased in others.

Research Products

• [Journal Article] Ostracods (Crustacea) with soft part preservation from Miocene cave deposits of the Riversleigh World Heritage Area, NW Queensland, Australia. (2013)
  • Author(s): Matzke-Karasz, R., Neil, J. V., Smith, R. J., Godthelp, H., Archer, M. & Hand, S. J.
  • Journal Title: Journal of Systematic Palaeontology
  • DOI: DOI:10.1080/14772019.2012.760007
  • Peer Reviewed
• [Journal Article] Global distribution of Fabaeformiscandona subacuta: an exotic invasive Ostracoda on the Iberian Peninsula? (2012)
  • Author(s): Escriva, A. Smith, R. J., Aguilar-Alberola, J. A., Kamiya, T., Karanovic, I., Rueda J., Schornikov, E. I. and Mesquita-Joanes, F.
  • Journal Title: Journal of Crustacean Biology Volume: Vol.32 Pages: 949-961
  • Peer Reviewed
• [Journal Article] A Recent species of Frambocythere Colin, 1980 (Ostracoda, Crustacea) from a cave in South Korea; the first extant representative of a genus thought extinct since the Eocene. (2012)
  • Author(s): Smith, R. J., Lee, J., Choi, Y. G., Chang, C. Y. & Colin, J-P.
  • Journal Title: Journal of Micropalaeontology Volume: 31 Pages: 131-138
  • Peer Reviewed
• [Journal Article] Nonmarine ostracods (Crustacea) from South Korea, including a description of a new species of Tanycypris Triebel (Cyprididae, Cypricercinae). (2012)
  • Author(s): Chang, C. Y., Lee, J. & Smith, R. J.
  • Journal Title: Zootaxa Volume: 3161 Pages: 1-19
  • Peer Reviewed
• [Journal Article] OMEGA : the Ostracod Metadatabase of Environmental and Geographica l Attributes. (2011)
  • Author(s): Horne, D. J., Curry, B. B., Delorme, L. D., Martens, K., Smith, A. J., & Smith, R. J.
  • Journal Title: Joannea Geologie und Palaontologie Volume: 11 Pages: 80-84
  • Peer Reviewed
• [Journal Article] Preliminary report on early Miocene freshwater ostracods (Crustacea) with soft part preservation from the Riversleigh site, NW Queensland, Australia. (2011)
  • Author(s): Matzke-Karasz, R., Smith, R. J., Neil, J. V., Godthelp, H., Archer, M. & Hand, S. J.
  • Journal Title: Joannea Geologie und Palaontologie Volume: 11 Pages: 122-123
  • Peer Reviewed
• [Journal Article] Technical dissection aspects for obtaining giant sperm. (2011)
  • Author(s): Rompa, S., Matzke-Karasz, R. & Smith, R. J.
  • Journal Title: Joannea Geologie und Palaontologie Volume: 11 Pages: 165-167
  • Peer Reviewed
• [Journal Article] Groundwater, spring and interstitial Ostracoda (Crustacea) from Shiga Prefecture, Japan, including descriptions of three new species and one new genus. (2011)
  • Author(s): Smith, R. J.
  • Journal Title: Zootaxa Volume: 3140 Pages: 15-37
  • Peer Reviewed
• [Journal Article] Recent Cyprididae and Ilyocyprididae (Crustacea: Ostracoda) from Lake Biwa, Japan, including a summary of the lake's ostracod fauna. (2011)
  • Author(s): Smith, R. J., Janz, H. & Okubo, I.
  • Journal Title: Zootaxa Volume: 2874 Pages: 1-37
  • Peer Reviewed
• [Journal Article] Lengths of Cypridoidean (Ostracoda, Crustacea) spermatozoa. (2011)
  • Author(s): Smith, R. J., Matzke-Karasz, R. & Kamiya, T.
  • Journal Title: Joannea Geologie und Palaontologie Volume: 11 Pages: 189-190
  • Peer Reviewed
• [Presentation] OMEGA : the Ostracod Metadatabase of Environmental and Geographica l Attributes. (2011)
  • Author(s): Horne, D. J., Curry, B. B., Delorme, L. D., Martens, K., Smith, A. J., & Smith, R. J.
  • Organizer: 7th European Ostracodologists' Meeting
  • Place of Presentation: グラーツ、オーストリア
  • Year and Date: 2011-07-27
• [Presentation] Preliminary report on early Miocenefreshwater ostracods (Crustacea) with soft part preservation from the Riversleigh site, NW Queensland, Australia. (2011)
  • Author(s): Matzke-Karasz, R., Smith, R. J., Neil, J. V., Godthelp, H., Archer, M. & Hand, S. J.
  • Organizer: 7th European Ostracodologists' Meeting
  • Place of Presentation: グラーツ、オーストリア
  • Year and Date: 2011-07-25
• [Presentation] Technical dissection aspects for obtaining giant sperm. (2011)
  • Author(s): Rompa, S., Matzke-Karasz, R. & Smith, R. J.
  • Organizer: 7th European Ostracodologists' Meeting
  • Place of Presentation: グラーツ、オーストリア
  • Year and Date: 2011-07-25
• [Presentation] Lengths of Cypridoidean (Ostracoda, Crustacea) spermatozoa. (2011)
  • Author(s): Smith, R. J., Matzke-Karasz, R. & Kamiya, T.
  • Organizer: 7th European Ostracodologists' Meeting
  • Place of Presentation: グラーツ、オーストリア
  • Year and Date: 2011-07-25