|
Tyrannomimus Fossils
''Tyrannomimus'' (meaning "tyrant mimic") is an extinct genus of ornithomimosaurian theropod dinosaurs from the Kitadani Formation of Japan. The type species is ''Tyrannomimus fukuiensis''. Discovery and naming ''Tyrannomimus'' is based on the holotype FPDM-V-11311, a partial postrcranial skeleton. Multiple referred specimens are also known. They were named as a new genus and species of ornithomimosaur in 2023. The generic name, "''Tyrannomimus''", is a reference to its morphological similarities with tyrannosauroids, particularly the vertical ridge of the ilium previously believed to be a synapomorphy of that clade and shared with ''Aviatyrannis''. The specific name, "''fukuiensis''", refers to Fukui Prefecture where the fossils were found. Classification ''Tyrannomimus'' was entered in a phylogenetic analysis by Hattori ''et al.'' (2023) and placed within the family Deinocheiridae, as the sister taxon to ''Harpymimus''. Their cladogram is shown below: Although it was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cretaceous
The Early Cretaceous (geochronology, geochronological name) or the Lower Cretaceous (chronostratigraphy, chronostratigraphic name) is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 143.1 Megaannum#SI prefix multipliers, Ma to 100.5 Ma. Geology Proposals for the exact age of the Barremian–Aptian boundary ranged from 126 to 117 Ma until recently (as of 2019), but based on drillholes in Svalbard the defining Anoxic event#Cretaceous, early Aptian Oceanic Anoxic Event 1a (OAE1a) was dated to 123.1±0.3 Ma, limiting the possible range for the boundary to c. 122–121 Ma. There is a possible link between this anoxic event and a series of Early Cretaceous large igneous provinces (LIP). The Ontong Java Plateau, Ontong Java-Manihiki Plateau, Manihiki-Hikurangi Plateau, Hikurangi large igneous province, emplaced in the South Pacific at c. 120 Ma, is by far the largest LIP in Earth's history. The Onto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beishanlong
''Beishanlong'' is a genus of giant ornithomimosaurian theropod dinosaur from the Early Cretaceous of China. It is the second-largest ornithomimosaur discovered, only surpassed by the related ''Deinocheirus.'' Discovery and naming Three fossils of ''Beishanlong'' were found in the early twenty-first century in Northwestern China at the ''White Ghost Castle'' site, in the province of Gansu. The type species is ''Beishanlong grandis'', described and named online in 2009 by a team of Chinese and American paleontologists, and formally published in January 2010 in paleontology, 2010 by the same Peter Makovicky, Li Daiqing, Gao Keqin, Matthew Lewin, Gregory Erickson and Mark Norrell. The generic name combines a references to the Bei Shan, the "North Mountains", with a Chinese ''long'', "dragon". The specific name (zoology), specific name means "large" in Latin, in reference to the body size. ''Beishanlong'' lived in the late Aptian stage, with its fossils being uncovered in layers of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinornithomimus
''Sinornithomimus'' is a genus of ornithomimid that lived in Asia during the Late Cretaceous period. The first remains were found in 1997, in the Late Cretaceous strata of the Ulansuhai Formation located at Alshanzuo Banner, Inner Mongolia Autonomous Region, Northern China. Discovery and naming The first fossil remains of ''Sinornithomimus'' were uncovered by Dong Zhiming in the Ulansuhai Formation as part of the Mongol Highland International Dinosaur Project in 1997. They contained at least fourteen skeletons found in close association, nine of which are nearly complete and relatively uncrushed. The find consisted of three sub-adult to adult specimens and eleven juveniles. The unweathered state of the bones, preserved in siltstone interspersed with layers of clay and the absence of evidence for post-mortem movement, argue for a catastrophic event that killed all the individuals present in the find simultaneously and instantaneously. The type species ''Sinornithomimus dongi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dzharacursor Bissektensis
''Dzharacursor'' (meaning "Dzharakuduk runner") is a genus of ornithomimid theropod dinosaurs from the Late Cretaceous (Turonian age) Bissekty Formation of Uzbekistan. The type and only species is ''Dzharacursor bissektensis'', originally assigned to the genus ''Archaeornithomimus''. Discovery and naming In 1995, Nesov named a new species of ornithomimosaur from the Bissekty Formation as ''Archaeornithomimus bissektensis'', based on the holotype CCMGE 479/12457 (formerly N 479/12457), a femur of a juvenile individual, along with other referred specimens including the metatarsals. However, in subsequent studies, the affinity of ''A. bissektensis'' was generally doubted or not mentioned. In 2025, Averianov & Sues assigned this taxon to the new genus ''Dzharacursor''. The new generic name combines Dzharakuduk, the name of the locality where its fossils were found, with the Latin word ''cursor'', meaning "runner". They also referred various partial cranial and postcranial material ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeornithomimus
''Archaeornithomimus'' (meaning "ancient bird mimic") is a genus of ornithomimosaurian theropod dinosaur that lived in Asia during the Late Cretaceous period, around 96 million years ago in the Iren Dabasu Formation. Discovery and naming In 1923, during the American Museum of Natural History expedition by Roy Chapman Andrews to Inner Mongolia, Peter Kaisen discovered numerous theropod remains in three quarries. They consist of the largely disarticulated remains of several individuals and material of the skull and the lower jaws is lacking. These were named and shortly described by Charles Whitney Gilmore in 1933 as a new species of '' Ornithomimus'': ''Ornithomimus asiaticus''. The specific name refers to the Asian provenance. The species was placed in the new genus ''Archaeornithomimus'' by Dale Russell in 1972, making ''Archaeornithomimus asiaticus'' the type species of the genus. The generic name combines that of ''Ornithomimus'' with a Greek ἀρχαῖος (''archaios'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithomimidae
Ornithomimidae (meaning "bird-mimics") is an extinct family of theropod dinosaurs which bore a superficial resemblance to modern ostriches. Ornithomimids were fast, omnivorous or herbivorous dinosaurs known mainly from the Late Cretaceous Period of Laurasia (now Asia and North America), though they have also been reported from the Lower Cretaceous Wonthaggi Formation of Australia. Description The skulls of ornithomimids were small, with large eyes, above relatively long and slender necks. All had toothless beaks. The fore limbs ('arms') were long and slender and bore powerful claws. The hind limbs were long and powerful, with a long foot and short, strong toes terminating in hooflike claws. Ornithomimids were probably among the fastest of all dinosaurs.Holtz, Thomas R. Jr. (2012) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,'Winter 2011 Appendix./ref> Like many other coelurosaurs, the ornithomimid hide was feathered rather than scaly. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraxenisaurus Normalensis As Deinocheirid
''Paraxenisaurus'' (, meaning "strange lizard") is an extinct genus of ornithomimosaurian theropod from the Late Cretaceous Cerro del Pueblo Formation of Coahuila in Mexico. The genus contains a single species, ''P. normalensis'', which is known from a few bones of tail, hips, hands, and feet. The specific epithet was given in honor of the Benemérita Normal School of Coahuila, a teacher training institution, where the fossils were reposited. It is a member of the family Deinocheiridae and is the only member of that clade known from Laramidia. Discovery During the 1990s, ornithomimosaur fossils were discovered at three sites in the Cerro del Pueblo Formation of Coahuila state. The known specimens of ''Paraxenisaurus'' were collected from three different localities near the towns of Parras de la Fuente and General Cepeda. Two decades later, these remains were identified as belonging to a distinct North American ornithomimosaur taxon. In 2020, they were named and described ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deinocheirus Restoration
''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 claws ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garudimimus Restoration
''Garudimimus'' (meaning "Garuda mimic") is a genus of ornithomimosaur that lived in Asia during the Late Cretaceous. The genus is known from a single specimen found in 1981 by a Soviet-Mongolian paleontological expedition in the Bayan Shireh Formation and formally described in the same year by Rinchen Barsbold; the only species is ''Garudimimus brevipes''. Several interpretations about the anatomical traits of ''Garudimimus'' were made in posterior examinations of the specimen, but most of them were criticized during its comprehensive redescription in 2005. Extensive undescribed ornithomimosaur remains at the type locality of ''Garudimimus'' may represent additional specimens of the genus. The only known specimen of ''Garudimimus'' was a medium-sized animal measuring nearly in length and weighing about . It was an ornithomimosaur with a mix of basal and derived features; unlike primitive ornithomimosaurs, both upper and lower jaws were toothless, a trait that is often reported ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
