''Prosynthetoceras'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

Artiodactyla The even-toed ungulates (Artiodactyla , ) are ungulates—hoofed animals—which bear weight equally on two (an even number) of their five toes: the third and fourth. The other three toes are either present, absent, vestigial, or pointing poste ...

, of the family Protoceratidae, endemic to North America. It lived from the Early to Middle

Miocene The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" ...

20.6—13.6 Ma, existing for approximately .''Prosynthetoceras'' at fossilworks
/ref> In appearance, ''Prosynthetoceras'' looked much like '' Syndyoceras'', '' Kyptoceras'', and ''

Synthetoceras ''Synthetoceras tricornatus'' is a large, extinct protoceratid, endemic to North America ( Nebraska ) during the Late Miocene, 10.3—5.3 Ma, existing for approximately . Fossils have been recovered from Nebraska and Texas Texas (, ; S ...

'' with three horns, one on the snout, and two above the eyes.

References

{{Taxonbar, from=Q7251128 Protoceratids Serravallian extinctions Miocene even-toed ungulates Miocene mammals of North America Aquitanian genus first appearances Fossil taxa described in 1967 Prehistoric even-toed ungulate genera