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Leptoceratopsidae
Leptoceratopsidae is an extinct family of neoceratopsian dinosaurs from Asia, North America and Europe. Leptoceratopsids resembled, and were closely related to, other neoceratopsians, such as the families Protoceratopsidae and Ceratopsidae, but they were more primitive and generally smaller. Phylogeny Leptoceratopsidae was originally named by Franz Nopcsa von Felső-Szilvás in 1923 as a subfamily Leptoceratopsinae, and its type species is ''Leptoceratops gracilis''. Mackovicky, in 2001, defined it as a stem-based taxon and a family consisting of ''Leptoceratops gracilis'' and all species closer to ''Leptoceratops'' than to ''Triceratops horridus''.Makovicky, P.J. 2001. A ''Montanoceratops cerorhynchus'' (Dinosauria: Ceratopsia) braincase from the Horseshoe Canyon Formation of Alberta, In: Tanke, D.H. & Carpenter, K. (Eds.). ''Mesozoic Vertebrate Life''. Bloomington: Indiana University Press. Pp. 243-262. The cladogram below follows the topologies from a 2015 analysis by Yiming ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratopsia
Ceratopsia or Ceratopia ( or ; Greek: "horned faces") is a group of herbivorous, beaked dinosaurs that thrived in what are now North America, Europe, and Asia, during the Cretaceous Period, although ancestral forms lived earlier, in the Jurassic. The earliest known ceratopsian, ''Yinlong downsi'', lived between 161.2 and 155.7 million years ago.Holtz, Thomas R. Jr. (2011) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,'Winter 2010 Appendix./ref> The last ceratopsian species, ''Triceratops prorsus'', became extinct during the Cretaceous–Paleogene extinction event, . ''Triceratops'' is by far the best-known ceratopsian to the general public. It is traditional for ceratopsian genus names to end in "''-ceratops''", although this is not always the case. One of the first named genera was ''Ceratops'' itself, which lent its name to the group, although it is considered a '' nomen dubium'' today as its fossil remains have no distinguishing charact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neoceratopsian
Ceratopsia or Ceratopia ( or ; Greek: "horned faces") is a group of herbivorous, beaked dinosaurs that thrived in what are now North America, Europe, and Asia, during the Cretaceous Period, although ancestral forms lived earlier, in the Jurassic. The earliest known ceratopsian, ''Yinlong downsi'', lived between 161.2 and 155.7 million years ago.Holtz, Thomas R. Jr. (2011) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,'Winter 2010 Appendix./ref> The last ceratopsian species, ''Triceratops prorsus'', became extinct during the Cretaceous–Paleogene extinction event, . ''Triceratops'' is by far the best-known ceratopsian to the general public. It is traditional for ceratopsian genus names to end in "''-ceratops''", although this is not always the case. One of the first named genera was ''Ceratops'' itself, which lent its name to the group, although it is considered a ''nomen dubium'' today as its fossil remains have no distinguishing characte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zhuchengceratops
''Zhuchengceratops'' is a genus of extinct leptoceratopsid ceratopsian that lived during the Upper Cretaceous of modern-day China. It was first described in 2010, by Xu ''et al.'', who created the binomial ''Zhuchengceratops inexpectus''. The name is derived from the location of Zhucheng, the Latinized-Greek ''ceratops'', or "horned face", and the unexpected articulated nature of the holotype. The skeleton was found in the Wangshi Group, which is of Late Cretaceous age, and most fossils are only disarticulated bones of ''Shantungosaurus''. ''Zhuchengceratops'' shares many features with Leptoceratopsidae as well as other ceratopsian groups such as Ceratopsidae. The overall size of the taxon was similar to ''Leptoceratops'', although slightly larger. ''Zhuchengceratops'' was analyzed to be in a group with ''Leptoceratops'' and ''Udanoceratops'', although internal relationships of this triplet were unresolved. Discovery and naming ''Zhuchengceratops'' is a derived leptoceratopsid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ischioceratops
''Ischioceratops'' () is an extinct genus of small herbivorous ceratopsian dinosaur that lived approximately 69 million years ago during the latter part of the Cretaceous Period in what is now China. ''Ischioceratops'' was a small sized, moderately-built, ground-dwelling, quadrupedal herbivore, whose total body length has been estimated to be about . The ceratopsians were a group of dinosaurs with parrot-like beaks which fed on vegetation and thrived in North America and Asia during the Cretaceous Period, which ended approximately 66 million years ago, at which point they all became extinct. Its name means "ischium horned face", referring to the peculiar shape of the ischiatic bones. ''Ischioceratops'' existed in the Wangshi Group during the late Cretaceous. It lived alongside centrosaurines, saurolophines, and tyrannosaurines. The most common creatures in the formation were ''Sinoceratops'' and ''Zhuchengtyrannus''. Discovery and naming In 2015, the type species ''Ischiocer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montanoceratops
''Montanoceratops'' is an extinct genus of small ceratopsian dinosaur that lived approximately 70 million years ago during the latter part of the Cretaceous Period in what is now Montana and Alberta. ''Montanoceratops'' was a small sized, moderately-built, ground-dwelling, quadrupedal herbivore, that could grow up to an estimated in length and in body mass. Description ''Montanoceratops'' was a typical primitive ceratopsian in many respects, distinguished from the later species by the presence of claws, rather than hooves, and by having teeth in its upper jaw, rather than a toothless beak. It was once thought to have a horn on its nose but that was a misplaced cheek horn.Holtz, Thomas R. Jr. (2008) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages'Supplementary Information/ref> According to Brown and Schlaikjer (1935), ''Montanoceratops'' can be distinguished based on the following characteristics: * the nasal bone is proportionally lar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptoceratops
''Leptoceratops'' (meaning 'Thin-horned face' and derived from Greek ''lepto-/λεπτο-'' meaning 'small', 'insignificant', 'slender', 'meagre' or 'lean', ''kerat-/κερατ-'' meaning 'horn' and ''-ops/ωψ'' meaning face), is a genus of leptoceratopsid ceratopsian dinosaurs from the late Cretaceous Period (late Maastrichtian age, 68.8-66 Ma ago) of what is now Western North America. Their skulls have been found in Alberta, Canada and Wyoming. Description ''Leptoceratops'' could probably stand and run on their hind legs: analysis of forelimb function indicates that even though they could not pronate their hands, they could walk on four legs. Paul proposed that ''Leptoceratops'' was around long and could have weighed , but Tereschenko proposed a maximum length of . Discovery and species The first small ceratopsian named ''Leptoceratops'' was discovered in 1910 by Barnum Brown in the Red Deer Valley in Alberta, Canada. He described it four years later. The first specimen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptoceratops Gracilis
''Leptoceratops'' (meaning 'Thin-horned face' and derived from Greek ''lepto-/λεπτο-'' meaning 'small', 'insignificant', 'slender', 'meagre' or 'lean', ''kerat-/κερατ-'' meaning 'horn' and ''-ops/ωψ'' meaning face), is a genus of leptoceratopsid ceratopsian dinosaurs from the late Cretaceous Period (late Maastrichtian age, 68.8-66 Ma ago) of what is now Western North America. Their skulls have been found in Alberta, Canada and Wyoming. Description ''Leptoceratops'' could probably stand and run on their hind legs: analysis of forelimb function indicates that even though they could not pronate their hands, they could walk on four legs. Paul proposed that ''Leptoceratops'' was around long and could have weighed , but Tereschenko proposed a maximum length of . Discovery and species The first small ceratopsian named ''Leptoceratops'' was discovered in 1910 by Barnum Brown in the Red Deer Valley in Alberta, Canada. He described it four years later. The first specimen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protoceratopsidae
Protoceratopsidae is a family of basal (primitive) ceratopsians from the Late Cretaceous period. Although ceratopsians have been found all over the world, protoceratopsids are only definitively known from Cretaceous strata in Asia, with most specimens found in China and Mongolia. As ceratopsians, protoceratopsids were herbivorous, with constantly replacing tooth batteries made for slicing through plants and a hooked beak for grabbing them. Protoceratopsids were small ceratopsians around 1-2.5 m in length. Their bony frill and horns were much smaller than more derived members of Ceratopsia, such as ceratopsids. Description Protoceratopsids were relatively small ceratopsians, averaging around 1-2.5 m in length from head to tail. Protoceratopsids have a frill and rostral bone characteristic of all ceratopsians. Their snout is particularly wedge-shaped with tall and narrow nostrils situated high on it. The antorbital fenestra is unusually small, and the antorbital fossa sits high on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unescoceratops
''Unescoceratops'' is a genus of leptoceratopsid ceratopsian dinosaurs known from the Late Cretaceous of Alberta, southern Canada. It contains a single species, ''Unescoceratops koppelhusae''. Discovery ''Unescoceratops'' is known only from the holotype specimen TMP 95.12.6, a partial left dentary. The fossil was collected in 1995 in the Black Coulee locality (formerly Deadhorse Coulee), near the Writing-on-Stone Provincial Park, from the Dinosaur Park Formation, dating to the late Campanian stage of the Late Cretaceous period, about 76.5-75 million years ago. The specimen was regarded as too incomplete to identify, and was shelved for several years. It was believed to be a ''Leptoceratops'' specimen at the time. A cladistic analysis done by Michael Ryan (of The Cleveland Museum of Natural History) and David Evans (of the Royal Ontario Museum) found it to be among the most advanced leptoceratopsid genera. Description ''Unescoceratops'' is thought to have been between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerasinops
''Cerasinops'' (meaning 'cherry face') was a small ceratopsian dinosaur. It lived during the Campanian of the late Cretaceous Period. a '''' article; the photographed skeleton is actually from ''''. Its fossils have been found in , in |
Udanoceratops
''Udanoceratops'' (meaning "Udan's horned face") is a genus of large leptoceratopsid dinosaur that lived during the Late Cretaceous period of Mongolia, in what is now the Djadokhta Formation. Discovery ''Udanoceratops'' was first named and described by Russian paleontologist Sergei Kurzanov in 1992 and the type species is ''Udanoceratops tschizhovi''. The holotype (PIN 3907/11) was collected during the 1980s at the Udan Sayr (also spelled Udyn Sayr or Üüden Sair) locality of the Djadokhta Formation in Ömnögovi Province, dating to the Campanian stage of the Late Cretaceous period. The generic name is derived from the name of the locality in which the holotype was found (Udan Sayr) and Greek ''ceras/κέρας'' meaning "horn" and ''-ops/ωψ'' meaning "face". ''Udanoceratops'' is best known from the holotype specimen, which represents a large individual comprising a large, relatively well-preserved and almost complete skull, and sparse body remains including vertebrae. In 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is the subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya; their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record shows that birds are feathered dinosaurs, having evolved from earlier theropods during the Late Jurassic epoch, and are the only dinosaur lineage known to have survived the Cretaceous–Paleogene extinction event approximately 66 mya. Dinosaurs can therefore be divided into avian dinosaurs—birds—and the extinct non-avian dinosaurs, which are all dinosaurs other than birds. Dinosaurs are varied from taxonomic, morphological and ecological standpoints. Birds, at over 10,700 living species, are among ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
