The Synthetoceras is a large, extinct hoofed animal that lived in North America during the Miocene epoch. It existed from 13.6—5.33 Ma, approximately 8.27 million years. The two horns above its eyes looked fairly normal and similar to those of many modern horned mammals, but on its snout it had a bizarre, long horn with a forked tip that gave it a Y shape. Only males had this strange horn, and they probably used it in territorial fights.
The Synthetoceras appears as a limited edition Glacier Park animal in Jurassic Park: Builder.
On October 26, 2017, Synthetoceras was added as a super rare Cenozoic snow creature.