Family

Protoceratopsidae

3 dinosaur genera in Omnisaura classed in Protoceratopsidae by the Paleobiology Database, oldest first. See all families.

ProtoceratopsGranger and Gregory 1923
Bones100.5–66 million years ago
BagaceratopsMaryanska and Osmólska 1975
Bones83.6–66 million years ago
BreviceratopsKurzanov 1990
Bones83.6–72.2 million years ago