Ceratopsia

Ceratopsia or Ceratopia ( or ; Greek: "horned faces") is a group of herbivorous, beaked dinosaurs that thrived in what are now North America, Asia and Europe, during the Cretaceous Period, although ancestral forms lived earlier, in the Late Jurassic of Asia. The earliest known ceratopsian, Yinlong downsi, lived between 161.2 and 155.7 million years ago. The last ceratopsian species, Triceratops prorsus, became extinct during the Cretaceous–Paleogene extinction event, .

Psittacosaurus ( ; "parrot lizard") is a genus of extinct ceratopsian dinosaur from the Early Cretaceous of what is now Asia, existing between 125 and 105 million years ago. It is notable for being the most species-rich non-avian dinosaur genus. Up to 13 species are known, from across China, Mongolia, Russia, and Thailand. The species of Psittacosaurus were obligate bipeds at adulthood, with a high skull and a robust beak. One individual was found preserved with long filaments on the tail, similar to those of Tianyulong. Psittacosaurus probably had complex behaviours, based on the proportions

Zuniceratops ('Zuni horned face') is a genus of ceratopsian dinosaurs that lived during the Turonian stage of the Late Cretaceous in what is now New Mexico, United States. Only a single species is known, Zuniceratops christopheri.

Yamaceratops is a genus of primitive ceratopsian that lived during the Late Cretaceous in what is now Mongolia. The genus contains a single species, Y. dorngobiensis. It was a relatively small dinosaur, with an estimated length of and weighing around .

Microceratus (meaning "small-horned") is a genus of small ceratopsian dinosaur that lived in the Cretaceous period of Mongolia. It walked on two legs, had short front arms, a characteristic ceratopsian frill and beak-like mouth, and was around long. It was one of the most primitive ceratopsians, or horned dinosaurs, along with Psittacosaurus, which was also discovered in Mongolia.

Turanoceratops ("Turan horned face") is a genus of herbivorous ceratopsian dinosaur from the late Cretaceous Bissekty Formation of Uzbekistan. The fossils dated from the mid-late Turonian stage, roughly 90 million years ago. The skull bore a pair of long brow horns like those seen in the Ceratopsidae, although Turanoceratops appears to have been transitional between earlier ceratopsians and ceratopsids, and not a ceratopsid itself.

Archaeoceratops, meaning "ancient horned face", is a genus of basal neoceratopsian dinosaur from the Early Cretaceous (Aptian stage) of north central China. It appears to have been bipedal and quite small, reaching in length and in body mass. It had a comparatively large head but no horns, possessing only a small bony frill projecting from the back of its head.

Koreaceratops () is a genus of basal ceratopsian dinosaur discovered in Albian-aged (Early Cretaceous) rocks of South Korea.

Liaoceratops, meaning "Liaoning horned face", is a ceratopsian dinosaur believed to be an early relative of the horned ceratopsids. It lived in the Early Cretaceous, 126 million years ago. It was discovered in China by a team of American and Chinese scientists. Liaoceratops was much smaller than its later relatives, but offers a glimpse into the early evolution of this group of dinosaurs. ==Discoveries and naming== left|thumb|Skeletal restoration Liaoceratops was discovered in the famous Liaoning Province of China, where several fossils of feathered dinosaurs have also been collected. The type

Ajkaceratops (pronounced "oi-ka-sera-tops") is a genus of ceratopsian dinosaur described in 2010. It lived during the Late Cretaceous in the western Tethyan archipelago, in what is now Europe. The type species, A. kozmai, was originally described as a ceratopsian most closely related to forms in east Asia, from where its ancestors may have migrated by island-hopping. Later research, however, questioned this assignment and treated Ajkaceratops as an ornithischian of unresolved affinity. In 2026, more complete cranial remains referable to the species were described, supporting its placement as a

Stenopelix (meaning "narrow pelvis") is a genus of basal ceratopsian from the Early Cretaceous (late Berriasian stage, approximately 140 million years ago) of Germany. The genus is based on a partial skeleton lacking the skull, and its classification is based on characteristics of the hips.

Graciliceratops (meaning "slender horned face") is a genus of neoceratopsian dinosaurs that lived in Asia during the Late Cretaceous period.

Auroraceratops, meaning "dawn horned face", is a genus of bipedal basal neoceratopsian dinosaur, from the Early Cretaceous (Aptian age) of north central China. The etymology of the generic name refers to its status as an early ceratopsian and also to Dawn Dodson, wife of Peter Dodson, one of the palaeontologists who described it.

Helioceratops is a genus of herbivorous neoceratopsian dinosaur from the Middle Cretaceous of China.

Aquilops is an early herbivorous ceratopsian dinosaur dating from the Early Cretaceous of North America, approximately 109 million to 104 million years ago. The type species is A. americanus.

Craspedodon (meaning 'edge tooth') is an extinct genus of ornithischian dinosaur from the Late Cretaceous Lonzée Member of Belgium. Only a single species, C. lonzeensis, is known.

Kulceratops is a genus of ceratopsian dinosaur from the Early Cretaceous. It lived in the late Albian stage. It is one of the few ceratopsians known from this period. However, the fossils from this genus have been sparse: only jaw and tooth fragments have been found so far.

Bainoceratops (meaning "mountain horned face", after the type locality, Bayn Dzak) is a genus of ceratopsian dinosaur from the late Campanian in the Late Cretaceous. The type species is B. efremovi. Its fossils were found in southern Mongolia in the Djadochta Formation.

genus of neoceratopsian dinosaur (fossil)

Mosaiceratops is a genus of ceratopsian dinosaur that lived in the upper Cretaceous Xiaguan Formation in what is now the Henan Province of China. It was described by Zheng, Jin, and Xu in 2015 as the type species Mosaiceratops azumai. Although phylogenetic analyses have found it to be the basalmost neoceratopsian, the authors noted that several features in the premaxilla and nasal bones are shared with Psittacosaurus, indicating that neoceratopsians evolved premaxillary teeth twice and that the latter is not as primitive as previously thought.

Sasayamagnomus (meaning "gnome from Sasayama") is an extinct genus of neoceratopsian dinosaur from the Early Cretaceous (Albian age) Ohyamashimo Formation of Hyōgo Prefecture, Japan. The genus contains a single species, Sasayamagnomus saegusai. The holotype individual is estimated to reach long, although this specimen is not fully grown.

Ferenceratops is an extinct genus of ceratopsian dinosaurs known from the Late Cretaceous (Maastrichtian) Sânpetru and Densuș-Ciula formations of Romania. The genus contains a single species, Ferenceratops shqiperorum, known from a partial skeleton and pelvis. These fossils, in addition to many other isolated or associated remains, were originally referred to the ornithopod Zalmoxes. Phylogenetic analyses based on new remains of Ajkaceratops suggest Ferenceratops was a close relative of this genus, as part of a distinct lineage of previously unrecognized European ceratopsians.

Ceratopsipes goldenensis is an ichnospecies of dinosaur footprint, described in 1995 from the Laramie Formation in Colorado. It is represented by massive pes prints approaching in width. If undistorted, the tracks may represent an unusually large Ceratopsian dinosaur that could have potentially been as large as 12 metres (39.4 feet).