†order Desmostylia Reinhart 1959 (desmostylian)
Invalid subtaxa: Desmostyliformes Hay 1923, Jamilcotatus Aranda-Manteca and Barnes 1998 [nomen nudum], Jamilcotatus boreios Aranda-Manteca and Barnes 1998 [nomen nudum], Jamilcotatus kumiaica Aranda-Manteca and Barnes 1998 [nomen nudum]
Full reference: R. H. Reinhart. 1959. A review of the Sirenia and Desmostylia. University of California Publications in Geological Sciences 36(1):1-146
Parent taxon: Tethytheria according to D. P. Domning 1996
Sister taxa: Anthracobunidae, Behemota, Embrithopoda, Proboscidea, Sirenia
Subtaxa: Behemotopsidae, Cornwalliidae, Desmostylidae, Kronokotherium, Paleoparadoxiidae
Ecology: aquatic herbivore