| 研究開始時の研究の概要 |
Cylindrical diatoms are commonly found in marine biosiliceous sediments around the world, with many of the genera having long stratigraphic records. However, due to the lack of good diagnostic features in the light microscope and the paucity of scanning electron microscope studies, diatomists rarely identify them to species level.This study aims to produce an online database of cylindrical fossil marine diatoms using both light and scanning electron microscope images in order to document their true diversity, and improve their identification and use in palaeoenvironmental reconstruction.
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| 研究実績の概要 |
During the 2023-2024 financial year, Proboscia spp. in the Sendai samples (Late Miocene) were photographed. The images of Proboscia spp. in the entire collection were sorted and described. New species were identified in Late Cretaceous (Devon Is., Cesar 6, Moreno Shale, DSDP Leg 29), Paleocene-Eocene (Central Arctic, Archangelsk, Smolkovo, Kamischev, Mors, Norwegian Sea, Israel, Barbados, California, Oamaru), Oligocene (Komandorsky Is.), Miocene (Hungary, Japan) and Pliocene (ODP Leg 120) samples. Some of the results were presented at the 26th International Diatom Symposium (Aug.-Sept. 2023, Yamagata).
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