Leptoceratopsidae A clade in the dinosaur family tree. The entries below are classified within it. Helioceratops 145–100 Mya · China Montanoceratops 145–66 Mya · Alberta, Canada Koreaceratops 103.5–102.5 Mya · South Korea Udanoceratops tschizhovi 100–66 Mya · North America Gremlin slobodorum 83.6–72.2 Mya Gryphoceratops morrisoni 83 Mya · Canada Cerasinops hodgskissi 80.2–77 Mya · North America Ischioceratops zhuchengensis 77.3–73.5 Mya · North America Zhuchengceratops inexpectus 77.3–73.5 Mya · China Unescoceratops koppelhusae 76.5–75 Mya · Canada Prenoceratops pieganensis 74.3 Mya · Canada Ferrisaurus sustutensis 72.2–66 Mya Leptoceratops 67.2–66.2 Mya · North America