|
Therizinosaurs
Therizinosaurs (once called segnosaurs) were large herbivorous theropod dinosaurs whose fossils have been found across the Early to Late Cretaceous deposits in Asia and North America. Various features of the forelimbs, skull and pelvis unite these finds as both theropods and maniraptorans, close relatives to birds. The name of the representative genus, ''Therizinosaurus'', is derived from the Greek (, 'to reap' or 'scythe')Translated paper and (, 'lizard'). The older representative, ''Segnosaurus'', is derived from the ('slow') and the Greek . History of research [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Segnosaurus
''Segnosaurus'' is a genus of therizinosaurid dinosaur that lived in what is now southeastern Mongolia during the Late Cretaceous, about 102–86 million years ago. Multiple incomplete but well-preserved specimens were discovered in the Gobi Desert in the 1970s, and in 1979 the genus and species ''Segnosaurus galbinensis'' were named. The generic name ''Segnosaurus'' means "slow lizard" and the specific name ''galbinensis'' refers to the Galbin region. The known material of this dinosaur includes the lower jaw, neck and tail vertebrae, the pelvis, shoulder girdle, and limb bones. Parts of the specimens have gone missing or become damaged since they were collected. ''Segnosaurus'' was a large-bodied therizinosaur that is estimated to have been about long and to have weighed about . It would have been bipedal, with the trunk of its body tilted upwards. The head was small with a beak at the tip of the jaws, and the neck was long and slender. The lower jaw was down-turned at t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Therizinosauridae
Therizinosauridae (meaning 'scythe lizards')Translated paper is a family of derived (advanced) therizinosauroid dinosaurs whose fossil remains have been found in mostly boundary. Even though representative fossils have only been found throughout and North America, the range of Therizinosauridae is believed to have span ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beipiaosaurus
''Beipiaosaurus'' is a genus of therizinosauroid theropod dinosaurs that lived in Asia during the Early Cretaceous in the Yixian Formation. The first remains were found in 1996 and formally described in 1999. Before the discovery of ''Yutyrannus'', they were among the heaviest dinosaurs known from direct evidence to be feathered. ''Beipiaosaurus'' is known from three reported specimens preserving numerous impressions of feather structures that allowed to determine the feathering color which turned out to be brownish. They were relatively small-sized therizinosaurs, measuring long and weighing about in contrast to the advanced and giant '' Segnosaurus'' or ''Therizinosaurus''. The necks of ''Beipiaosaurus'' were shorter than in most therizinosaurs, whose are characterized by elongated necks adapted for high-browsing. Also, their feet configuration differs from therizinosaurids, having a generic three-toed pes instead of four as seen in other members. The exact classification o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Therizinosaurus Arms
''Therizinosaurus'' (; meaning 'scythe lizard') is a genus of very large therizinosaurid that lived in Asia during the Late Cretaceous period in what is now the Nemegt Formation around 70 million years ago. It contains a single species, ''Therizinosaurus cheloniformis''. The first remains of ''Therizinosaurus'' were found in 1948 by a Mongolian field expedition at the Gobi Desert and later described by Evgeny Maleev in 1954. The genus is only known from a few bones, including gigantic manual unguals (claw bones), from which it gets its name, and additional findings comprising fore and hindlimb elements that have been discovered during the 1960s–1980s. ''Therizinosaurus'' was a colossal therizinosaurid that could grow up to long and tall, and weigh possibly over . Like other therizinosaurids, it would have been a slow-moving, long-necked, high browser equipped with a rhamphotheca (horny beak) and a wide torso for food processing. Its forelimbs were particularly robust and h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Therizinosaurus
''Therizinosaurus'' (; meaning 'scythe lizard') is a genus of very large therizinosaurid that lived in Asia during the Late Cretaceous period in what is now the Nemegt Formation around 70 million years ago. It contains a single species, ''Therizinosaurus cheloniformis''. The first remains of ''Therizinosaurus'' were found in 1948 by a Mongolian field expedition at the Gobi Desert and later described by Evgeny Maleev in 1954. The genus is only known from a few bones, including gigantic manual unguals (claw bones), from which it gets its name, and additional findings comprising fore and hindlimb elements that have been discovered during the 1960s–1980s. ''Therizinosaurus'' was a colossal therizinosaurid that could grow up to long and tall, and weigh possibly over . Like other therizinosaurids, it would have been a slow-moving, long-necked, high browser equipped with a rhamphotheca (horny beak) and a wide torso for food processing. Its forelimbs were particularly robust and had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theropods
Theropoda (; ), whose members are known as theropods, is a dinosaur clade that is characterized by hollow bones and three toes and claws on each limb. Theropods are generally classed as a group of saurischian dinosaurs. They were ancestrally carnivorous, although a number of theropod groups evolved to become herbivores and omnivores. Theropods first appeared during the Carnian age of the late Triassic period 231.4 million years ago ( Ma) and included all the large terrestrial carnivores from the Early Jurassic until at least the close of the Cretaceous, about 66 Ma. In the Jurassic, birds evolved from small specialized coelurosaurian theropods, and are today represented by about 10,500 living species. Biology Diet and teeth Theropods exhibit a wide range of diets, from insectivores to herbivores and carnivores. Strict carnivory has always been considered the ancestral diet for theropods as a group, and a wider variety of diets was historically considered a characteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theropoda
Theropoda (; ), whose members are known as theropods, is a dinosaur clade that is characterized by hollow bones and three toes and claws on each limb. Theropods are generally classed as a group of saurischian dinosaurs. They were ancestrally carnivorous, although a number of theropod groups evolved to become herbivores and omnivores. Theropods first appeared during the Carnian age of the late Triassic period 231.4 million years ago ( Ma) and included all the large terrestrial carnivores from the Early Jurassic until at least the close of the Cretaceous, about 66 Ma. In the Jurassic, birds evolved from small specialized coelurosaurian theropods, and are today represented by about 10,500 living species. Biology Diet and teeth Theropods exhibit a wide range of diets, from insectivores to herbivores and carnivores. Strict carnivory has always been considered the ancestral diet for theropods as a group, and a wider variety of diets was historically considered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falcarius
''Falcarius'' (meaning "sickle cutter") is a genus of primitive therizinosaur dinosaur that lived during the Early Cretaceous period in what is now North America. Its remains were first collected in the Cedar Mountain Formation in 1999, with subsequent findings made during the 2000s. The genus is known from multiple specimens ranging from immature to fully-grown individuals. ''Falcarius'' was a long bipedal herbivore with a small head and an elongated neck and tail. Unlike advanced therizinosaurs, ''Falcarius'' had a propubic pelvis and three-toed feet with a reduced hallux (first digit). ''Falcarius'' is the basalmost known definitive therizinosaurian genus, and has been considered a transitional form connecting the typical theropod bodyplan to the unusual morphology of Therizinosauridae. Its description in 2005, following that of the basal therizinosauroid '' Beipiaosaurus'' from the Early Cretaceous of China in 1999, helped clarify the early evolution of the Therizinos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jianchangosaurus
''Jianchangosaurus'' is a genus of therizinosaurian dinosaur that lived approximately 126 million years ago during the early part of the Cretaceous Period from the Yixian Formation in what is now China. The nearly complete juvenile specimen was missing only the distal tail. ''Jianchangosaurus'' was a small, lightly built, bipedal, ground-dwelling herbivore, that could grow up to an estimated long and was high at the hips. Discovery and naming The holotype specimen, 41HIII-0308A, was discovered on the Yixian Formation of Jianchang County, in the western part of Liaoning Province and purchased by the Henan Geological Museum noting that some of the elements were repositioned during its preparation. The genus name ''Jianchangosaurus'', means "Jianchang lizard", and is derived from "Jianchang", the name of the county of Liaoning Province, China, where the specimen was found, and the Greek word "" () meaning "lizard". The specific name ''yixianensis'', refers to the Yixian Forma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enigmosaurus
''Enigmosaurus'' (meaning "Enigma lizard" or "Enigmatic lizard") is a genus of therizinosauroid that lived in Asia during the Late Cretaceous period. It was a medium-sized, ground-dwelling, bipedal herbivore that represents the third therizinosaur taxon from the Bayan Shireh Formation, although it is known from the lower part. The genus is monotypic, including only the type species ''E. mongoliensis'', known from a well preserved pelvis and other tentative body remains. Discovery and naming The holotype, IGM 100/84, was discovered at the Khara Khutul locality in the Bayan Shireh Formation (sometimes called Baynshire Formation or the Baynshirenskaya Svita), southeastern Mongolia, dating from the Late Cretaceous period, and first reported in 1979 on a pelvic comparison with other theropod dinosaurs. At the time, little was known about therizinosaurs. In 1980, it was mentioned again, this time in the new infraorder created by the Mongolian paleontologists Rinchen Barsbold and Altan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suzhousaurus
''Suzhousaurus'' (meaning "Suzhou lizard") is a genus of large therizinosauroid dinosaur from the Early Cretaceous of China. The genus is known from two specimens discovered on the Xiagou Formation and Zhonggou Formation—which are situated in the Xinminbao Group. These findings were made during field-works in 1999 and 2004. Though ''Suzhousaurus'' is known from these two specimens, an earlier named and described therizinosauroid from the adjacent basin, ''"Nanshiungosaurus" bohlini'', may be synonymous with the former. However, ''Suzhousaurus'' can not be compared to this species due to non-overlapping material and the loss of the same. Moreover, this synonymy will result in ''Suzhousaurus bohlini'' with ''"N". bohlini'' having priority. ''Suzhousaurus'' was an unusually large Early Cretaceous therizinosauroid reaching lengths of and nearly in weight. The upper arm (humerus) was very distinct from therizinosaurids, making ''Suzhousaurus'' to be considered as a therizinosa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eshanosaurus
''Eshanosaurus'' is a genus of a dinosaur from the early Jurassic Period. It is known only from a fossil partial lower jawbone, found in China. It may be a therizinosaurian, and if so the earliest known coelurosaur. Discovery and naming The type species, ''Eshanosaurus deguchiianus'', was described by Xu Xing, Zhao, and James M. Clark in 2001. The generic name is derived from Eshan. The specific name honours Hikaru Deguchi who convinced Xu that he should study dinosaurs. The type specimen, consisting of three fragments of a fossilized left lower jaw and teeth, was uncovered in the Dull Purplish Beds of the Lower Lufeng Formation in Yunnan, dating to about 196 million years ago (Hettangian stage). The specimen is in the collection of the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing, where it is catalogued under accession number IVPP V11579. Classification The authors who initially described the fossil, classified ''Eshanosaurus'' as a member of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
