Family Dugongidae Gray 1821 (dugong)
Synonyms: Halicorida Brandt 1868, Halicoridae Gray 1825, Halicoroidea Gill 1871
Full reference: J. E. Gray. 1821. On the natural arrangement of vertebrose animals. The London Medical Repository Monthly Journal and Review 15:296-310
Parent taxon: Sirenia according to W. Turner 1912
Sister taxa: Dugongoidea, Prorastomidae, Prorastomoidea, Protosirenidae, Rhytinidae, Trichechidae
Subtaxa: Anisosiren, Dugong, Dugonginae, Halitheriinae, Hydrodamalinae, Indosiren, Miodugong, Paralitherium, Prohalicore, Rytiodinae, Rytiodus, Sirenavus
Ecology: aquatic herbivore