(Barlow, 1996)

Leptoceratops -described by Brown, 1914 (Dodson, 1996). Leptoceratops, although a 'horned' dinosaur, has no nasal horn, nor horns anywhere else. Leptoceratops is tiny, at most 2.7m long, and has the simplest of frills which is lacking a pareitosquamosal crest, fenestrae, and other features (ex. epoccipitals) typical of large horned dinosaurs (Dodson, 1996). Although it possesses the most primitive characteristics, it co-existed with Triceratops - the most advanced ceratopsian.