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Chasmosaurinae
Chasmosaurinae is a subfamily of ceratopsid dinosaurs. They were one of the most successful groups of herbivores of their time. Chasmosaurines appeared in the early Campanian, and became extinct, along with all other non- avian dinosaurs, during the Cretaceous–Paleogene extinction event. Broadly, the most distinguishing features of chasmosaurines are prominent brow horns and long frills lacking long spines; centrosaurines generally had short brow horns and relatively shorter frills, and often had long spines projecting from their frills. Chasmosaurines evolved in western North America (Laramidia). They are currently known definitively from rocks in western Canada, the western United States, and northern Mexico. They were highly diverse and among the most species-rich groups of dinosaurs, with new species frequently described. This high diversity of named species is likely a result of the frill. The distinctive shape of the frill with the hornlets on its edges (epoccipitals) m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triceratops
''Triceratops'' ( ; ) is a genus of Chasmosaurinae, chasmosaurine Ceratopsia, ceratopsian dinosaur that lived during the late Maastrichtian age of the Late Cretaceous Period (geology), period, about 68 to 66 million years ago on the island continent of Laramidia, now forming western North America. It was one of the last-known non-avian dinosaurs and lived until the Cretaceous-Paleogene extinction event, Cretaceous–Paleogene extinction event 66 million years ago. The name ''Triceratops'', which means 'three-horned face', is derived from the Ancient Greek, Greek words () meaning 'three', () meaning 'horn', and () meaning 'face'. Bearing a large bony neck frill, frill, three horns on the skull, and a large, four-legged body, exhibiting convergent evolution with bovines and rhinoceroses, ''Triceratops'' is one of the most recognizable of all dinosaurs and the best-known ceratopsian. It was also one of the largest, measuring around long and weighing up to . It shared the la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anchiceratops
''Anchiceratops'' ( ) is an extinct genus of chasmosaurinae, chasmosaurine ceratopsid dinosaur that lived approximately 72 to 71 million years ago during the latter part of the Cretaceous Period (geology), Period in what is now Alberta, Canada. ''Anchiceratops'' was a medium-sized, heavily built, ground-dwelling, quadrupedal herbivore that could grow up to an estimated long. Its skull featured two long brow horns and a short horn on the nose. The skull frill was elongated and rectangular, its edges adorned by coarse triangular projections. About a dozen skulls of the genus have been found. History of discovery The first remains of ''Anchiceratops'' were discovered along the Red Deer River in the Provinces and territories of Canada, Canadian province of Alberta in 1912 by an expedition led by Barnum Brown. The holotype, specimen AMNH 5251, is the back half of a skull, including the long frill, and two other partial skulls, specimens AMNH 5259 (the paratype) and AMNH 5273, were f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Judiceratops
''Judiceratops'' ( ; meaning "Judith River horned face") is an extinct horned dinosaur. It lived around 78 million years ago, during the Late Cretaceous Period in what is now Montana, United States. Like other horned dinosaurs, ''Judiceratops'' was a large, quadrupedal herbivore. It is the oldest known chasmosaurine. Discovery The holotype YPM VPPU 022404 consists of an incomplete skull including the horns, parts of the frills, and fragments from the back of the frill. ''Judiceratops'' shows a distinctive combination of characters, not seen in other ceratopsids. The postorbital (located above the eyes) horns are moderately elongate, inclined forward and outwards, and have an unusual teardrop-shaped cross section.Other fragmentary specimens are known from the same area, which preserve distinctive features of the frill. A referred specimen, YPM VPPU 023262, overlaps the holotype in two areas, including the distal blade of the squamosal, and the postorbital horns. It resembles t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chasmosaurus
''Chasmosaurus'' ( ) is a genus of ceratopsid dinosaur from the Late Cretaceous Period in North America. Its given name means 'opening lizard', referring to the large openings ( fenestrae) in its frill (Greek ''chasma'', meaning 'opening', 'hollow', or 'gulf'; and ''sauros'', meaning 'lizard'). With a length of and a weight of —or anywhere from 2,200 to nearly 5,000 lbs., give or take—''Chasmosaurus'' was of a slightly smaller to ‘average’ size, especially when compared to larger ceratopsians (such as ''Triceratops'', which were about the size of an African bush elephant). It was initially to be called ''Protorosaurus'', but this name had been previously published for another animal. All of the excavated specimens of ''Chasmosaurus'' were collected at the Dinosaur Park Formation, Dinosaur Provincial Park, Alberta, Canada. Referred specimens of ''C. russelli'' come from the lower beds of the formation, while ''C. belli'' comes from the middle and upper beds. Discover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chasmosaurus Belli
''Chasmosaurus'' ( ) is a genus of ceratopsid dinosaur from the Late Cretaceous Period in North America. Its given name means 'opening lizard', referring to the large openings ( fenestrae) in its frill (Greek ''chasma'', meaning 'opening', 'hollow', or 'gulf'; and ''sauros'', meaning 'lizard'). With a length of and a weight of —or anywhere from 2,200 to nearly 5,000 lbs., give or take—''Chasmosaurus'' was of a slightly smaller to ‘average’ size, especially when compared to larger ceratopsians (such as ''Triceratops'', which were about the size of an African bush elephant). It was initially to be called ''Protorosaurus'', but this name had been previously published for another animal. All of the excavated specimens of ''Chasmosaurus'' were collected at the Dinosaur Park Formation, Dinosaur Provincial Park, Alberta, Canada. Referred specimens of ''C. russelli'' come from the lower beds of the formation, while ''C. belli'' comes from the middle and upper beds. Discovery and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coahuilaceratops
''Coahuilaceratops'' (meaning "horned face from Coahuila") is a genus of chasmosaurine ceratopsian dinosaur that lived during the early Maastrichtian age of the Late Cretaceous epoch, about 71.5 to 70.5 million years ago in what is now northern Mexico. It contains a single species, ''Coahuilaceratops magnacuerna''. Discovery and naming Fossils of ''Coahuilaceratops'' were discovered by Claudio de Leon near the town of Porvenir de Jalpa in the south of Coahuila, Mexico in 2001 and excavated in 2003. The deposits where the remains were found were originally assigned to the Cerro del Pueblo Formation (upper Campanian; ca. 73–72.5 Ma), but in a 2024 stratigraphic revision they were assigned to the overlying Cerro Huerta Formation (lower Maastrichtian; about 71.5–70.5 million years). This makes ''Coahuilaceratops'' the first dinosaur described from the Cerro Huerta Formation. The lower Maastrichtian age of the deposits is consistent with the relatively derived phylogenetic po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torosaurus
''Torosaurus'' (meaning "perforated lizard", in reference to the large openings in its frill) is a genus of herbivorous Chasmosaurinae, chasmosaurine Ceratopsia, 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.*Hicks, J.F., Johnson, K.R., Obradovich, J. D., Miggins, D.P., and Tauxe, L. 2003. Magnetostratigraphyof Upper Cretaceous (Maastrichtian) to lower Eocene strata of the Denver Basin, Colorado. In K.R. Johnson, R.G. Raynolds and M.L. Reynolds (eds), Paleontology and Stratigraphy of Laramide Strata in the Denver Basin, Pt. II., Rocky Mountain Geology 38: 1-27. Fossils have been discovered across the Laramidia, Western Interior of North America, from as far north as Saskatchewan to as far south as Texas. ''Torosaurus'' possessed the largest skulls of any known land animal, with the frilled skull r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vagaceratops
''Vagaceratops'' (meaning "wandering (''vagus'', Latin) horned face", in reference to its close relationship with ''Kosmoceratops'' from Utah) is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period (late Campanian) in what is now Alberta. Its fossils have been recovered from the Upper Dinosaur Park Formation. It is sometimes included in the genus ''Chasmosaurus'' as ''Chasmosaurus irvinensis'' instead of being recognized as its own genus. History In 2010, paleontologist Scott D. Sampson and colleagues named ''Vagaceratops'' (from the Dinosaur Park Formation, whose sole species, ''C. irvinensis'', was formerly placed in ''Chasmosaurus''), as well as ''Kosmoceratops'' and ''Utahceratops'' (from the Kaiparowits Formation) in the same article. These genera, which were considered unusual compared to typical members of their group, were part of a spate of ceratopsian discoveries in the early 21st century, when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiclypeus
''Spiclypeus'' (meaning "spike shield") is an extinct genus of chasmosaurine ceratopsian dinosaur known from the Late Cretaceous Judith River Formation (late Campanian stage) of Montana, United States. Discovery In 2000, Bill D. Shipp, a nuclear physicist, bought the Paradise Point Ranch near the town of Winifred, Montana, Winifred, in Fergus County. Believing that his land contained fossils, Shipp hired the local veteran fossil collector John C. Gilpatrick to explore the terrain together. On their first trip during an afternoon in September 2005, Shipp found the ''Spiclypeus'' specimen on his land in Montana. He saw a thighbone jutting out of a hillside at the Judith River Breaks. Shipp then hired the amateur paleontologist Joe Small to excavate the fossils. At the cost of several hundred thousand dollars, a road was constructed to allow an excavator to remove the overburden covering the skull of the specimen. In 2007, Small and his team managed to secure all remaining bones. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierraceratops
''Sierraceratops'' (meaning " Sierra horned face") is a genus of chasmosaurine ceratopsian from the Late Cretaceous Hall Lake Formation of New Mexico, United States. The genus contains a single species, ''Sierraceratops turneri'', known from a partial skeleton discovered in 1997. Discovery In 1997, geologist Gregory H. Mack discovered fossils of a large horned dinosaur on the Armendaris ranch of Ted Turner, founder of CNN, near Truth or Consequences in Sierra County, New Mexico. They had been exposed on the surface by erosion. A team of the New Mexico Museum of Natural History and Science subsequently uncovered more bones with the cooperation of the ranch manager, Tom Wadell. In 1998, the discovery was reported in the scientific literature and referred to ''Torosaurus latus''.Lucas, S.G.; Mark, G.H. & Estep, J.W. 1998. "The ceratopsian ''Torosaurus'' from the Upper Cretaceous McRae Formation, Sierra County, New Mexico" In: ''New Mexico Geological Society Guidebook, 49th Field Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utahceratops
''Utahceratops'' is an extinct genus of ceratopsian dinosaur that lived approximately 76.4~75.5 million years ago during the Late Cretaceous period (geology), period in what is now Utah. ''Utahceratops'' was a large-sized, robustly-built, ground-dwelling, quadrupedal herbivore, that could grow up to an estimated long. Discovery The genus name ''Utahceratops'', means "horned face from Utah", and is derived from the state of Utah and Greek language, Greek words "keras" (κέρας) meaning "horn" and "ops" (ὤψ) referring to the "face". The specific name (zoology), specific name ''gettyi'', is derived from the name of Mike Getty, who discovered the holotype and has played a pivotal role in the recovery of fossils from the Grand Staircase–Escalante National Monument (GSENM). It was first named by Scott D. Sampson, Mark A. Loewen, Andrew A. Farke, Eric M. Roberts, Catherine Forster, Catherine A. Forster, Joshua A. Smith and Alan L. Titus in 2010 in paleontology, 2010, and the typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terminocavus
''Terminocavus'' is a genus of Ceratopsidae, ceratopsid dinosaur from the late Cretaceous Period (geology), Period of what is now North America. The genus contains a single species, the type species ''Terminocavus sealeyi'', known from a parietal and some other associated fragments. The holotype specimen was discovered in the Kirtland Formation of New Mexico in 1997, and was later described and named in a 2020 study. It was similar in anatomy to ''Pentaceratops'' and ''Anchiceratops'', which it was closely related to, but had a distinctive heart-shaped upper frill with very narrow notch. It has been hypothesized to form an anagenetic series with several other chasmosaur species. Discovery and naming The holotype specimen NMMNH P-27468, collected in 1997, consists of a parietal (or fused paired parietals), other skull fragments, a partial sacrum, and vertebral fragments. It was discovered in grey siltstone deposits from the Campanian Hunter Wash Member of the Kirtland Formation of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
