About the Authors

Taketeru Tomita

teruteru-saurus@hotmail.co.jp

Affiliations Hokkaido University Museum, Hakodate, Hokkaido, Japan, Department of Geology, University of California Davis, Davis, California, United States of America

Sho Tanaka

Affiliation School of Marine Science and Technology, Tokai University, Shimizu, Shizuoka, Japan

Keiichi Sato

Affiliation Okinawa Churashima Research Center, Okinawa Churashima Foundation, Motobu, Okinawa, Japan

Kazuhiro Nakaya

Affiliation Hokkaido University, Hakodate, Hokkaido, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TT ST KS KN. Performed the experiments: TT ST KS KN. Analyzed the data: TT ST. Contributed reagents/materials/analysis tools: ST KS. Wrote the paper: TT ST.