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New distribution record of deep-sea mussel, Bathymodiolus aduloides (Mollusca: Bivalvia: Mytilidae) from a hydrothermal vent, Myojinsho

  • Tomoko Koito (a1), Jun Hashimoto (a2), Suguru Nemoto (a3), Madoka Kitajima (a3), Mitsugu Kitada (a3) and Koji Inoue (a4)...


From the deep-sea hydrothermal vents and cold seeps ecosystems, more than 600 species containing many endemic species have been discovered. The deep-sea mussels of the genus Bathymodiolus are dominant species at deep-sea hydrothermal vents and cold seeps throughout the world. They are known to rely on the nutrients produced by the chemosynthetic symbiont in their gills. In 2009, we found a colony of bathymodiolin mussels at a hydrothermal vent of Myojinsho (Myojin Reef), which is a hardly investigated area. Myojinsho lies in the northern segment of the Izu-Ogasawara (Bonin) Arc and had been volcanically active until recently. We collected specimens from the colony using a remotely operated vehicle. We identified them as Bathymodiolus aduloides by morphological observation and phylogenetic analyses using mitochondrial DNA sequencing. We could not find any other species of mussels during the dive. This result is interesting because this species has not been discovered from hydrothermal vents in this region; the dominant species in this region, including the neighbouring Myojin Knoll Caldera, is B. septemdierum.


Corresponding author

Correspondence should be addressed to: T. Koito, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan email:


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New distribution record of deep-sea mussel, Bathymodiolus aduloides (Mollusca: Bivalvia: Mytilidae) from a hydrothermal vent, Myojinsho

  • Tomoko Koito (a1), Jun Hashimoto (a2), Suguru Nemoto (a3), Madoka Kitajima (a3), Mitsugu Kitada (a3) and Koji Inoue (a4)...


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