Prorastomus

Prorastomus Temporal range: Middle Eocene PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Sirenia
Family:	†Prorastomidae
Genus:	†Prorastomus Owen, 1855
Species:	†P. sirenoides
Binomial name
Prorastomus sirenoides Owen, 1855

Prorastomus sirenoides is an extinct species of primitive sirenian that lived during the Eocene Epoch 40 million years ago in Jamaica.

While modern sirenians are fully aquatic, the 1.5 metres (5 ft) Prorastomus was predominantly terrestrial, judging from the structure of its skull. Judging from its crown-shaped molars and the shape of its snout, it fed on soft plants.