The objective of this report is to document first Mesozoic occurrences of chemosynthesis-based Tokyo, Tokyo, Japan; Yoshitsugu Kobayashi ykobayashi@museum.hokudai.ac.jp and Hiroki Echizenya etizen@museum.hokudai.ac.jp, Hokkaido University Museum, Kita 10, Nishi 8, Sapporo, Hokkaido, Japan; Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan. This is an open-access article distributed under the terms of the Creative Commons Attribution License (for details please see creativecommons.org), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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