Genus
Valid Extinct

Leptoceratops

Brown 1914
Etymology Mince tête cornue

Leptoceratops is a genus of ceratopsian dinosaur from the Late Cretaceous of North America. First found in Alberta in 1910, the type species Leptoceratops gracilis was named in 1914 by Barnum Brown for a partial skull and skeleton of two individuals found in the Scollard Formation of Alberta. Additional specimens found in the Scollard include one complete and two mostly complete skeletons together, uncovered in 1947 by Charles M. Sternberg. Specimens from Montana that were among the earliest referred to Leptoceratops have since been moved to their own genera Montanoceratops and Cerasinops, while new specimens of L. gracilis include bonebed remains from the Hell Creek Formation of Montana and a partial skeleton from the Lance Formation of Wyoming. Together with related taxa, Leptoceratops is the eponymous genus of the family Leptoceratopsidae. Leptoceratops is known from more than ten individuals, all from Maastrichtian deposits of Alberta, Montana and Wyoming, representing the entire skeleton.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
8
Group
Dinosaures
Herbivore Ground dwelling Terrestrial
Leptoceratops
click to enlarge
Fossil of Leptoceratops at the Canadian Museum of Nature, Ottawa © Hectonichus · CC BY-SA 3.0 · Wikimedia
PBDB Wikipedia
Classification
Dinosauria Unranked clade
Ornithischia Unranked clade
Neornithischia Unranked clade
Pyrodontia Unranked clade
Cerapoda Unranked clade
Marginocephalia Unranked clade
Ceratopsia Suborder
Neoceratopsia Infraorder
Leptoceratopsidae Family
Leptoceratops Genus
Measurements
Length
2,6 m
Leptoceratops gracilis 
3 m
Mass
200 kg
Leptoceratops gracilis 
Fossil sites 8 geolocated sites
Distribution
Top countries
🇺🇸 United States
5
🇨🇦 Canada
3
Geological formations
Scollard
3
Pinyon Conglomerate
1
"Lance"
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
8
Species (1)
Leptoceratops gracilis 72 Ma
News 1
Leptoceratops: Beast of the Week
Leptoceratops: Beast of the Week
limb Canada Cretaceous Late Cretaceous Ceratopsia +2
 Today we will be looking at the small ceratopsian dinosaur, Leptoceratops gracilis!Leptoceratops was a plant-eating ceratopsian dinosaur that lived in what is now Alberta, Canada, during the late Cretaceous period, between 68 and 66 million years ago.  From beak to tail it measured about 6.5 feet (about 2m) and would have been able to walk on four or two limbs when alive. The genus name translates to "small horned face". Leptoceratops life reconstruction in watercolors by Christopher DiPiazza.L
08/06/2026 prehistoricbeastoftheweek
Images 2
Bibliography
Original description
B. Brown. 1914. Leptoceratops, a new genus of Ceratopsia from the Edmonton Cretaceous of Alberta. Bulletin of the American Museum of Natural History 33(36):567-580
Bibliography (7)
W. W. Stein. 2021. The paleontology, geology and taphonomy of the Tooth Draw Deposit; Hell Creek Formation (Maastrictian), Butte County, South Dakota. The Journal of Paleontological Sciences JPS.C.21:0001:1-108
C. J. Ott. 2007. Cranial anatomy and biogeography of the first Leptoceratops gracilis (Dinosauria: Ornithischia) specimens from the Hell Creek Formation, southeast Montana. Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs
L. S. Russell. 1987. Biostratigraphy and paleontology of the Scollard Formation, Late Cretaceous and Paleocene of Alberta. Royal Ontario Museum Life Sciences Contribution 147:1-23 DOI ↗
J. H. Ostrom. 1978. <i>Leptoceratops gracilis</i> from the "Lance" Formation of Wyoming. Journal of Paleontology 52(3):697-704
M. C. McKenna and J. D. Love. 1970. Local stratigraphic and tectonic significance of Leptoceratops, a Cretaceous dinosaur in the Pinyon Conglomerate, northwestern Wyoming. United States Geological Survey Professional Paper 700(D):D55-D61
C. M. Sternberg. 1950. Leptoceratops, the most primitive horned dinosaur, from the Upper Edmonton of Alberta. Transactions of the Royal Society of Canada, series 3 44:229
B. Brown. 1914. Leptoceratops, a new genus of Ceratopsia from the Edmonton Cretaceous of Alberta. Bulletin of the American Museum of Natural History 33(36):567-580