author1Yusuke Takeda. Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. This email address is being protected from spambots. You need JavaScript enabled to view it.

Yusuke Takeda is a PhD candidate at the University of Tokyo and belongs to the Department of Paleontology and Historical Geology at the University Museum, The University of Tokyo. He has worked on palaeoecology and evolution of cephalopods. Especially he has focused on their biotic interactions, such as predator-prey relationships. His research targets include cephalopod fossils from his hometown Hokkaido, Japan, Western Interior, USA and modern nautilids from the Pacific.

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author2Kazushige Tanabe. Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. This email address is being protected from spambots. You need JavaScript enabled to view it.

Kazushige Tanabe, Ph.D., an Emeritus Professor of the University of Tokyo, is now working as a research fellow at the Department of Earth and Planetary Science and University Museum, the University of Tokyo. His research interests include all aspects of paleobiology and biology of modern and fossil cephalopod mollusks, and marine ecology of bivalve mollusks. For more details of his academic records, see the following site: researchmap.jp/read0007821/?lang=english.

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author3Takenori Sasaki. The University Museum, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. This email address is being protected from spambots. You need JavaScript enabled to view it.

Takenori Sasaki is an associate professor in charge of the Department of Paleontology and Historical Geology at The University Museum, The University of Tokyo. His research has focused on comparative morphology, anatomy and systematics of molluscs, covering both neontology and paleontology.

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author4Kentaro Uesugi. Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 Japan. This email address is being protected from spambots. You need JavaScript enabled to view it.

Kentaro Uesugi, Ph.D., a researcher of JASRI, is now working as a beamline scientist at SPring-8, Japan. His research interest is development of x-ray micro-tomography system using synchrotron radiation.

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author5Masato Hoshino. Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 Japan. This email address is being protected from spambots. You need JavaScript enabled to view it.

Masato Hoshino, Ph.D., a researcher of JASRI, is now working as a beamline scientist at SPring-8, Japan. His research interest is development of a novel imaging and measurement system using synchrotron X-rays.