Initiation of a species-level fossil diatom image database

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K06820
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 45030:Biodiversity and systematics-related
• Research Institution: Yamagata University
• Principal Investigator: Jordan Richard 山形大学, 理学部, 教授 (90260455)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 化石 / 海洋 / 珪藻 / 分類 / 形態学 / 種の多様性 / Proboscia

Outline of Final Research Achievements

In the published literature about 25 living and fossil species of the marine diatom genus Proboscia have already been described. However, in the fossil record, there are many more that remain undocumented or misidentified, or in need of transferring from Rhizosolenia to Probocia. So, the current research project set out to illustrate and describe as many of these species as possible. Of the samples investigated so far, about 30 new species have been revealed, as well as about 10 named species that should be transferred to Proboscia. The process of formally describing these species is on-going, but one species, Proboscia pinocchioi, was published in 2023. During this project, the genus Pyxilla was also investigated and shown to be closely related to Proboscia through the possession of a specialised structure (rimoportula) at the end of the extended valve.

Free Research Field

微古生物学

Academic Significance and Societal Importance of the Research Achievements

これらの新種が正式に記載され、一部のRhizosolenia属が移入された後にProboscia属、種の年齢範囲を決定することが容易になり、この属がより有用になるでしょう。生層序学的ゾーン分類スキームと属内の進化傾向を明らかにします。