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Umbonium sp.

genus Umbonium Link, 1807

Invalid synonym: genus Suchium Makiyama, 1924

• Modern species: Middle Jurassic - Present (242.0 - 0.0 Ma)
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Gastropoda, family Trochidae

• Distribution
• Miocene: Tochigi, Kanagawa, Kyoto, Shimane
• Miocene-Pliocene: Hokkaido
• Pliocene: Niigata, Ibaraki, Kanagawa, Shizuoka
• Pliocene-Pleistocene: Niigata, Kanagawa
• Pleistocene: Hokkaido, Toyama, Ishikawa, Ibaraki, Tokyo, Chiba, Kanagawa, Shizuoka, Aichi
• Holocene: Ishikawa, Chiba, Aichi
• Investigation in progress: Nagano

• Subtaxa
• U. akitanum
• U. costatum
• U. giganteum
• U. moniliferum
• U. mysticum
• U. subsuchiense
• U. suchiense