†subfamily Hydrodamalinae Palmer 1895 (dugong)
Mammalia - Sirenia - Dugongidae
Alternative spelling: Hydrodamalidae
Synonyms: Rhytinea Brandt 1846, Rytinadae Gray 1843, Rytineae Brandt 1833, Rytinidae Girard 1852
Full reference: T. S. Palmer. 1895. The earliest name for Steller's sea cow and Dugong. Science 2(40):449-450
Parent taxon: Dugongidae according to D. P. Domning 2008
Sister taxa: Anisosiren, Dugonginae, Halitheriinae, Indosiren, Miodugong, Paralitherium, Prohalicore, Rytiodinae, Rytiodus, Sirenavus, Dugong
Subtaxa: Dusisiren, Hydrodamalis
Ecology: aquatic herbivore