Torosaurus (meaning "perforated lizard", in reference to the large openings in its frill) is a genus of herbivorous chasmosaurine ceratopsian dinosaur that lived during the late Maastrichtian age of the Late Cretaceous period, between 68 and 66 million years ago, though it is possible that the species range might extend to as far back as 69 million years ago. Fossils have been discovered across the Western Interior of North America, from as far north as Saskatchewan to as far south as Texas. Measuring between 7.5 and 9 m (25 and 30 ft) and weighing around 8 t (18,000 lb), Torosaurus possessed the largest skulls of any known land animal, with the frilled skull reaching 2.77 metres (9.1 ft) in length. Torosaurus is thought to have been the same size as the contemporary Triceratops.

Utahceratops is an extinct genus of ceratopsian dinosaur that lived approximately 76.4~75.5 million years ago during the Late Cretaceous period in what is now Utah. Utahceratops was a large-sized, robustly-built, ground-dwelling, quadrupedal herbivore, that could grow up to an estimated 4.5–5 m (15–16 ft) long.

Medusaceratops is an extinct genus of centrosaurine ceratopsian dinosaur known from the Late Cretaceous Judith River Formation (middle Campanian stage) of Montana, northern United States. It contains a single species, Medusaceratops lokii.

Regaliceratops (meaning "Royal horned face") is a monospecific genus of chasmosaurine ceratopsid dinosaur from Alberta, Canada that lived during the Late Cretaceous (middle Maastrichtian stage, 68.5 to 67.5 Ma) in what is now the St. Mary River Formation. The type and only species, Regaliceratops peterhewsi, is known only from an adult individual with a nearly complete skull lacking the lower jaw, which was nicknamed "Hellboy". Regaliceratops was named in 2015 by Caleb M. Brown and Donald M. Henderson. Regaliceratops has an estimated length of 5 metres (16 ft) and body mass of 2 metric tons (2.2 short tons). The skull of Regaliceratops displays features more similar to centrosaurines, which suggests convergent evolution in display morphology in ceratopsids.

Avaceratops is a genus of small herbivorous ceratopsian dinosaurs which lived during the late Campanian in what are now the Northwest United States. Most fossils come from the Judith River Formation. Avaceratops was originally by Dodson considered to have been an exceptionally small species. He estimated the holotype length at 2.3 metres (7.5 ft) and assumed it had almost attained adult size. The maturity of the animal was disputed by a 2019 histological analysis. In addition, a second skull (which does not necessarily belong to Avaceratops), MOR 692, indicates a body length of 4.2 metres (14 ft). Paul in 2010 estimated the weight of a four-metre-long animal at one tonne. Another change in the image of Avaceratops brought about by MOR 692 concerned the brow horns.

Einiosaurus is a genus of herbivorous centrosaurine ceratopsian dinosaur from the Upper Cretaceous (Campanian stage) of northwestern Montana. The name means 'bison lizard', in a combination of Blackfeet Indian eini and Latinized Ancient Greek sauros; the specific name (procurvicornis) means 'with a forward-curving horn' in Latin. Einiosaurus is medium-sized with an estimated body length at 4.5 metres (15 ft).

Albertaceratops (meaning "Alberta horned face") is a genus of centrosaurine horned dinosaur from the middle Campanian-age Upper Cretaceous Oldman Formation of Alberta, Canada. Albertaceratops is unusual in combining long brow horns with an otherwise centrosaurine skull, as centrosaurines normally possess short brow horns. Over its nose was a bony ridge, and on its frill were two large outwardly-projecting hooks.[1] Its size has been estimated at 5.8 metres (19 ft) and 3,500 kilograms (7,700 lb).

Wendiceratops is a genus of herbivorous centrosaurine ceratopsian dinosaur from the Late Cretaceous of Canada. Wendiceratops reached 6 metres (20 ft) in length and 1.5 metric tons (1.7 short tons) in body mass. The describing authors indicated two unique traits, or autapomorphies: On the rear rim of the neck frill, the second and third epiparietals, which are skin ossifications attached to the rim, have a wide base, are vertically thick and curve obliquely upwards to the front, overhanging the rear and outer side branches of the parietal bone. The ischium has an expanded rectangular lower end. Wendiceratops is further distinguished by the presence of an erect nose horn, and the lack of a vertical spike on the rear frill.

Xenoceratops (meaning "alien horned face") is a genus of centrosaurine ceratopsid dinosaur known from the Late Cretaceous (middle Campanian stage), and is known to have lived in what is currently Alberta, Canada. The genus has one known species, Xenoceratops foremostensis, after its place of discovery, the Foremost Formation.

Size estimates for the largest Pachyrhinosaurus species, P. canadensis indicate lengths of 6–8 metres (19.7–26.2 ft) and a weight of 3–4 tonnes (3.3–4.4 tons). The other species, P. lakustai and P. perotorum, have been estimated by Greg Paul at 5 metres (16.4 ft) in length and 2 tonnes (2.2 tons) in weight. They were herbivorous and possessed strong cheek teeth to help them chew tough, fibrous plants. Instead of horns, their skulls bore massive, flattened bosses: a large boss over the nose and a smaller one over the eyes. A prominent pair of horns grew from the frill and extended upwards. The skull also bore several smaller horns or ornaments that varied between individuals and between species. In P. canadensis and P. perotorum, the bosses over the nose and eyes nearly grew together.

Kosmoceratops (/ˌkɒzməˈsɛrətɒps/) is a genus of ceratopsid dinosaur that lived in North America about 76–75.9 million years ago during the Late Cretaceous period. Specimens were discovered in Utah in the Kaiparowits Formation of the Grand Staircase–Escalante National Monument in 2006 and 2007, including an adult skull and postcranial skeleton and partial subadults. In 2010, the adult was made the holotype of the new genus and species Kosmoceratops richardsoni; the generic name means "ornate horned face", and the specific name honors Scott Richardson, who found the specimens. The find was part of a spate of ceratopsian discoveries in the early 21st century, and Kosmoceratops was considered significant due to its elaborate skull ornamentation.