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Ornithomimosauria
Ornithomimosauria ("bird-mimic lizards") are theropod dinosaurs which bore a superficial resemblance to the modern-day ostrich. They were fast, omnivorous or herbivorous dinosaurs from the Cretaceous Period of Laurasia (now Asia, Europe and North America), as well as possibly Africa. The group first appeared in the Early Cretaceous and persisted until the Late Cretaceous. Primitive members of the group include '' Nqwebasaurus'', '' Pelecanimimus'', '' Shenzhousaurus'', '' Hexing'' and '' Deinocheirus'', the arms of which reached 2.4 m (8 feet) in length. More advanced species, members of the family Ornithomimidae, include '' Gallimimus'', '' Struthiomimus'', and '' Ornithomimus''. Some paleontologists, like Paul Sereno, consider the enigmatic alvarezsaurids to be close relatives of the ornithomimosaurs and place them together in the superfamily Ornithomimoidea (see classification below). Description The skulls of ornithomimosaurs were small, with large eyes, above ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deinocheirus
''Deinocheirus'' ( ) is a genus of large ornithomimosaur that lived during the Late Cretaceous around 70 million years ago. In 1965, a pair of large arms, shoulder girdles, and a few other bones of a new dinosaur were first discovered in the Nemegt Formation of Mongolia. In 1970, this specimen became the holotype of the only species within the genus, ''Deinocheirus mirificus''; the genus name is Greek for "horrible hand". No further remains were discovered for almost fifty years, and its nature remained a mystery. Two more complete specimens were described in 2014, which shed light on many aspects of the animal. Parts of these new specimens had been looted from Mongolia some years before, but were repatriated in 2014. ''Deinocheirus'' was an unusual ornithomimosaur, the largest of the clade at long, and weighing . Though it was a bulky animal, it had many hollow bones which saved weight. The arms were among the largest of any bipedal dinosaur at long, with large, blunt claw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallimimus
''Gallimimus'' ( ) is a genus of theropod dinosaur that lived in what is now Mongolia during the Late Cretaceous period, about seventy million years ago (mya). Several fossils in various stages of growth were discovered by Polish-Mongolian expeditions in the Gobi Desert of Mongolia during the 1960s; a large skeleton discovered in this region was made the holotype specimen of the new genus and species ''Gallimimus bullatus'' in 1972. The generic name means "chicken mimic", referring to the similarities between its neck vertebrae and those of the Galliformes. The specific name is derived from '' bulla'', a golden capsule worn by Roman youth, in reference to a bulbous structure at the base of the skull of ''Gallimimus''. At the time it was named, the fossils of ''Gallimimus'' represented the most complete and best preserved ornithomimid ("ostrich dinosaur") material yet discovered, and the genus remains one of the best known members of the group. ''Gallimimus'' is the largest know ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arkansaurus
''Arkansaurus'' (meaning "Arkansas lizard") is an extinct genus of ornithomimosaurian theropod dinosaur. It lived during the Albian and Aptian stages of the Early Cretaceous. The type and only species is ''Arkansaurus fridayi''. History In August 1972, Joe B. Friday, who owned a service station in Lockesburg, Arkansas, noticed some vultures circling above his land. Checking his cows, he noticed that fossil bones were visible in a ditch near the road where some gravel had been removed recently for the reconstruction of Arkansas Highway 24. He removed them and for some months displayed the fossils in his station. At the time, nobody recognised them for dinosaur bones.McDonnold, Paul, 2014, "Them Dry Bones", ''Arkansas Life'', September 2014, pp 80–85 A geology professor at the University of Arkansas and former resident of the nearby town of Nashville, Doy Zachry Jr., took the bones to his colleague at the University of Arkansas, paleontologist Dr. James H. Quinn, to view. Quinn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinnareemimus
''Kinnareemimus'' (, meaning "Kinnara#Thailand, Kinnaree mimic", after a figure from Thai folklore) is an extinct genus of ornithomimosaurian theropod dinosaur that was discovered in the Early Cretaceous Sao Khua Formation in what is now Thailand. The genus contains only the type species, ''K. khonkaenensis''. The specific epithet is after Khon Kaen Province, which is in northeastern Thailand, where the remains of the animal were discovered. Discovery and naming Ornithomimosaur body fossils and ichnofossils were reported in Thailand's Khorat Plateau as early as 1997 in a publication by Eric Buffetaut and colleagues. At the time, only two dinosaur genera, ''Siamotyrannus'' and ''Phuwiangosaurus'' had been named from the country. Their report included a drawing of the metatarsals of an ornithomimosaur which had been uncovered at a locality called "Phu Wiang 5". These metatarsals clearly showed the derived arctometatasalian condition, similar to the ornithomimosaurs known from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haplocheirus
''Haplocheirus'' (, meaning "simple hand") is an extinct genus of theropod dinosaur from the Middle Jurassic Shishugou Formation of Xinjiang in China. It is generally considered to be an alvarezsauroid, although some researchers have questioned this assignment. The genus contains a single species, ''H. sollers'', which is known from a mostly complete skeleton including the skull. The quality of the preservation in the only known specimen of ''Haplocheirus'' is near-perfect and preserves the animal in three dimensions. This makes ''Haplocheirus'' one of the most well-known Jurassic coelurosaurs from anywhere in the world. The specimen has been relatively well-studied in comparison with other comparable taxa like '' Zuolong'' or '' Guanlong'', which has allowed researchers to gain insights into the evolution of maniraptorans as well as the sensory capabilities, diet, and ontogeny of primitive coelurosaurs. Discovery The type and only specimen of ''Haplocheirus'' was given t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexing
''Hexing'' is an extinct genus of basal ornithomimosaur dinosaur known from the Early Cretaceous of northeastern China. It contains a single species, ''Hexing qingyi''. Discovery and naming In the early twenty-first century, a local farmer at Xiaobeigou in Liaoning discovered the skeleton of a small theropod. He prepared the fossil himself, trying to enhance its value by restoring damaged bones and adding fake parts. Eventually the specimen was obtained by the Geological Museum of Jilin University and more expertly prepared, during which process the added parts were again removed. In 2012, the type species ''Hexing qingyi'' was named and described by Jin Liyong, Chen Jun and Pascal Godefroit. The generic name means "like a crane" in Chinese. The specific name means "with slender wings". The holotype, JLUM-JZ07b1, was found in fluvial deposits of the lower Yixian Formation, which have a highest possible age of 139 million years and a lowest of 128 million years and thus d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deinocheiridae
Deinocheiridae is an extinct family of ornithomimosaurian dinosaurs, living in Asia and North America from the Aptian until the Maastrichtian, with a possible Late Jurassic record in Europe. The family was originally named by Halszka Osmólska and Roniewicz in 1970, including only the type genus ''Deinocheirus''. In a 2014 study by Yuong-Nam Lee and colleagues and published in the journal ''Nature'', it was found that Deinocheiridae was a valid family. Lee ''et al.'' found that based on a new phylogenetic analysis including the recently discovered complete skeletons of ''Deinocheirus'', the type genus, as well as '' Garudimimus'' and ''Beishanlong'', could be placed as a successive group, with ''Beishanlong'' as the most primitive and ''Deinocheirus'' as most derived. The family Garudimimidae, named in 1981 by Rinchen Barsbold, is now a junior synonym of Deinocheiridae as the latter family includes the type genus of the former. The group existed from 115 to 69 million years ago, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviatyrannis
''Aviatyrannis'' is a genus of coelurosaurian theropod dinosaur, either a tyrannosauroid or an ornithomimosaurian, from the Oxfordian-Tithonian stages of the Late Jurassic found in Portugal. Discovery and naming In 2000 Oliver Walter Mischa Rauhut reported the find of tyrannosauroid material in the lignite coal mine of Guimarota near Leiria, which he referred to ''Stokesosaurus''. Later concluding the distinctiveness of the material justified a separate genus, Rauhut in 2003 named and described it as the type species ''Aviatyrannis jurassica''. The species name was by Rauhut given the intended meaning of "tyrant's grandmother from the Jurassic". The generic name is derived from Latin ''avia'', "grandmother", and ''tyrannus'', "tyrant", on the presumption ''tyrannis'' would be its genitive. The specific name means "Jurassic". The holotype, IPFUB Gui Th 1, was found in a layer of the Alcobaça Formation dating from the early Kimmeridgian, about 155 million years old. It c ... [...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 Geological period, period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the #Evolutionary history, evolution of dinosaurs is a subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya and their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record shows that birds are feathered dinosaurs, Evolution of birds, having evolved from earlier Theropoda, 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 taxonomy (biology), taxonomic, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthiomimus
''Struthiomimus'', meaning "ostrich-mimic" (from the Greek στρούθειος/''stroutheios'', or "of the ostrich", and μῖμος/''mimos'', meaning "mimic" or "imitator"), is a genus of ornithomimid dinosaurs from the late Cretaceous of North America. Ornithomimids were long-legged, bipedal, ostrich-like dinosaurs with toothless beaks. The type species, ''Struthiomimus altus'', is one of the more common, smaller dinosaurs found in Dinosaur Provincial Park; their overall abundance—in addition to their toothless beak—suggests that these animals were mainly herbivorous or (more likely) omnivorous, rather than purely carnivorous. Similar to the modern extant ostriches, emus, and rheas (among other birds), ornithomimid dinosaurs likely lived as opportunistic omnivores, supplementing a largely plant-based diet with a variety of small mammals, reptiles, amphibians, insects, invertebrates, and anything else they could fit into their mouth, as they foraged. History of discovery ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anserimimus
''Anserimimus'' ( ; "goose mimic") is a genus of ornithomimid theropod dinosaur, from the Late Cretaceous Period of what is now Mongolia. It was a lanky, fast-running animal, possibly an omnivore. From what fossils are known, it probably closely resembled other ornithomimids, except for its more powerful forelimbs. Discovery ''Anserimimus'' was found in the Mongolian aimag, or province, of Bayankhongor during a joint Soviet-Mongolian expedition to the Gobi Desert, in the late 1970s. Mongolian paleontologist Rinchen Barsbold named ''Anserimimus'' in 1988, combining the Latin ''anser'' meaning 'goose' with the Greek ''mimos'' meaning 'mimic'. ''Anser'' is the generic name of several species of geese. Although ''Anserimimus'' does not specifically resemble a goose, ornithomimosaurs have traditionally been named after different types of birds, such as ''Struthiomimus'' ('ostrich mimic'), ''Gallimimus'' ('rooster mimic'), and ''Pelecanimimus'' ('pelican mimic'). The one named specie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theropod
Theropoda (; from ancient Greek , (''therion'') "wild beast"; , (''pous, podos'') "foot"">wiktionary:ποδός"> (''pous, podos'') "foot" is one of the three major groups (clades) of dinosaurs, alongside Ornithischia and Sauropodomorpha. Theropods, both extant and extinct, are characterized by hollow bones and three toes and claws on each limb. They are generally classed as a group of saurischian dinosaurs, placing them closer to sauropodomorphs than to ornithischians. They were ancestrally carnivorous, although a number of theropod groups evolved to become herbivores and omnivores. Members of the subgroup Coelurosauria and possibly some other or all theropods were covered in feathers. In the Jurassic, birds evolved from small specialized coelurosaurian theropods, and are currently represented by about 11,000 living species, making theropods the only group of dinosaurs alive today. Theropods first appeared during the Carnian age of the late Triassic period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
