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Sirenia fam., gen. et sp. indet., Sea cow(s)

order Sirenia Illiger, 1811

• Modern species: Eocene - Present (55.8 - 0.0 Ma)
• Habitat: Marine, Brackish, Freshwater

• Classification
• kingdom Animalia, phylum Chordata, class Mammalia

• Distribution
• Miocene: Hokkaido, Yamagata
• Miocene-Pliocene: Nagano
• Pliocene: Hokkaido, Yamagata, Shizuoka
• Pliocene-Pleistocene: Ishikawa
• Pleistocene: Hokkaido

• Subtaxa
• Dugong, genus
• Dusisiren, genus
• Hydrodamalis, genus