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Neostegosauria
Stegosauria is a group of herbivorous ornithischian dinosaurs that lived during the Jurassic and early Cretaceous periods. Stegosaurian fossils have been found mostly in the Northern Hemisphere (North America, Europe and Asia), Africa and South America. Their geographical origins are unclear; the earliest unequivocal stegosaurian, ''Bashanosaurus primitivus'', was found in the Bathonian Shaximiao Formation of China. Stegosaurians were armored dinosaurs (thyreophorans). Originally, they did not differ much from more primitive members of that group, being small, low-slung, running animals protected by armored scutes. An early evolutionary innovation was the development of spikes as defensive weapons. Later species, belonging to a subgroup called the Stegosauridae, became larger, and developed long hindlimbs that no longer allowed them to run. This increased the importance of active defence by the thagomizer, which could ward off even large predators because the tail was in a higher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loricatosaurus
''Loricatosaurus'' (meaning "armored lizard") is a genus of stegosaurid dinosaur known from Callovian-aged (Middle Jurassic) rocks of England and France. Discovery and naming ''Loricatosaurus'' is known from remains previously assigned to ''Lexovisaurus'' that were first discovered at the Fletton brick pit in the Oxford Clay Formation, Fletton, Peterborough, England, by Alfred Leeds during November 1901.J. W. Hulke. 1887. Note on some dinosaurian remains in the collection of A. Leeds, Esq. Part I. Ornithopsis leedsii. Part II. Omosaurus, sp. Geological Magazine, decade 3 4:375-376 Leeds collected a semi articulated skeleton consisting of two cervical, six dorsal, and 16 caudal vertebrae, a partial right forelimb, partial left hindlimb, partial pelves, and some fragmentary dermal armor. One piece of armor was described as a parascapular spine, but it is actually a fragmentary tail spine. In 1957, another specimen now referred to ''Loricatosaurus'' was briefly referred to ''Lex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jiangjunosaurus
''Jiangjunosaurus'' is an extinct genus of herbivorous stegosaurian dinosaurs from the Oxfordian-age (Upper Jurassic) Shishugou Formation of the Junggar Basin, Xinjiang, China. Discovery and naming In 2002, Liu Yongfei discovered the remains of a stegosaurian. These were secured by a Sino-American expedition and prepared by Xiang Lishi and Ding Xiaoqing. The type species, ''Jiangjunosaurus junggarensis'', was named and described by Jia Chengkai, Catherine Foster, Xu Xing and James Clark in 2007. The generic name refers to the abandoned town of Jiangjunmiao. ''Jiangjun'', 將 軍, is "general" in Chinese and the town's name, the "temple of the general", has been explained by the burial of one. The specific name refers to the provenance from the Junggar. The holotype, IVPP V 14724, was found in a layer of the Shishugou Formation, dating from the Oxfordian. It includes the lower jaws, some rear skull bones, eleven neck vertebrae, ribs, a scapula, a coracoid, and two neck plat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcovasaurus
''Alcovasaurus'' is an extinct genus of herbivorous stegosaurian dinosaurs that lived in the Late Jurassic. It was found in the Morrison Formation of Natrona County, Wyoming, Natrona County, Wyoming, United States. The genus contains a monotypic taxon, single species, ''Alcovasaurus longispinus'', originally assigned to the genus ''Stegosaurus''. It is likely a member of the Dacentrurinae, and has been referred to the genus ''Miragaia longicollum, Miragaia'' by some authors. Discovery and naming In July 1908, Professors William Harlow Reed and A.C. Dart of the University of Wyoming, in the Alcova Quarry in Natrona County, Wyoming, uncovered the skeleton of a stegosaurian. This would be the last major excavation of a dinosaur in which Reed was personally involved. In 1914, the find was named and described as ''Stegosaurus longispinus'' by Charles Whitney Gilmore on the basis of holotype UW 20503 (originally UW D54), a partial postcranial skeleton of an adult individual consisting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isaberrysaura
''Isaberrysaura'' is an extinct genus of stegosaurian ornithischian dinosaurs from the Middle Jurassic Los Molles Formation of Patagonia, Argentina. The genus contains a single species, ''I. mollensis'', described by Salgado in 2017 based on a single specimen. Although initially classified as a basal neornithischian, subsequent analyses have allied it with the Stegosauria as the morphology of its skull resembles those of other members of the group. Discovery The ''Isaberrysaura'' holotype specimen, MOZ-Pv 6459, was discovered in the marine to deltaic sediments of the Los Molles Formation, which is of Bajocian age, by Isabel Valdivia Berry, who is honoured in the generic name. The specimen consists of a partial skeleton (the postcranial material of which is still unprepared) with a nearly complete skull , six cervical vertebrae, fifteen dorsal vertebrae, a sacrum with a partial ilium and apparently complete pubis, nine caudal vertebrae, part of a scapula, ribs, and othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mongolostegus
''Mongolostegus'' (meaning "Mongolian roof") is an extinct genus of stegosaurian dinosaurs from the Early Cretaceous (Aptian–Albian ages) Dzunbain Formation of Mongolia. The genus contains a single species, ''Mongolostegus exspectabilis'', known from a fragmentary single specimen representing the first stegosaur named from Mongolia. It is one of the youngest known stegosaurs, along with '' Yanbeilong'' and an unnamed species from the Hekou Group of China. In contrast to these taxa, which are members of the late-diverging stegosaur subfamily Stegosaurinae, ''Mongolostegus'' may have affinities to more basal taxa such as the Huayangosauridae. Discovery and description The ''Mongolostegus'' holotype specimen, PIN 3779-15 was discovered in 1981 by a joint expedition between Soviet and Mongolian researchers. The specimen, recovered from a layer of the Dzunbain Formation at Chamrin-Us, Mongolia, comprises a single caudosacral vertebra articulated with the first five , a , the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baiyinosaurus
''Baiyinosaurus'' (meaning "Baiyin reptile") is an extinct genus of stegosaurian dinosaurs from the Middle Jurassic Wangjiashan Formation of China. The genus contains a Monotypic taxon, single species, ''B. baojiensis'', known from a partial skeleton including cranial bones. The skeletal anatomy of ''Baiyinosaurus'' demonstrates transitional features between Basal (phylogenetics), basal thyreophorans and stegosaurs. While many stegosaurs are known from China, ''Baiyinosaurus'' is the only one currently named from Gansu Province. Discovery and naming The ''Baiyinosaurus'' holotype specimen, Gansu Agricultural University, IVPG-D021, was discovered in 2016 by Li Daqing and his crew during excavations in sediments of the Wangjiashan Formation (Straw-yellow Sandstone Member). These outcrops are in the Pingchuan District of the city of Baiyin in Gansu Province, China. Following their discovery, the bones were collected and Fossil preparation, prepared by the Gansu Zhendan Dinosaur Cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypsirhophus
''Hypsirhophus'' (meaning "high roof"; often misspelled "''Hypsirophus''") is a genus of stegosaurian dinosaurs. It contains a single species, ''Hypsirhophus discurus'', which is known only from a fragmentary specimen. The fossil consists of partial vertebrae from the back, three from the tail, and a piece of rib. History and classification The first described fossils of ''Hypsirhophus discurus'' were unearthed by schoolteacher Oramel William Lucas who working for Edward Drinker Cope at Cope's Quarry 3 near "Cope's Nipple" at Garden Park, a fossil site 3.8 miles northeast of Canon City, Colorado, and came from the Tithonian strata of the Upper Jurassic. The fossils now accepted as ''Hypsirhophus'' were fragmentary and came from one individual, containing: a dorsal vertebra, 2 partial neural spines, 2 caudal vertebral centra, and a rib fragment. These fossils were then sent to Cope, who briefly described them in 1878 as part of the Bone Wars, a competition between Cope and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hesperosaurus
''Hesperosaurus'' (meaning "western lizard", from Classical Greek (') "western" and (') "lizard") is a herbivorous stegosaurian dinosaur from the Kimmeridgian age of the Jurassic period, approximately 156 million years ago. Fossils of ''Hesperosaurus'' have been found in the state of Wyoming and Montana in the United States of America since 1985. The type species ''Hesperosaurus mjosi'' was named in 2001. It is from an older part of the Morrison Formation, and so a little older than other Morrison stegosaurs. Several relatively complete skeletons of ''Hesperosaurus'' are known. One specimen preserves the first known impression of the horn sheath of a stegosaurian back plate. ''Hesperosaurus'' was a member of the Stegosauridae, quadrupedal plant-eaters protected by vertical bony plates and spikes. It was closely related to ''Stegosaurus'' and was similar to it in having two rows of, possibly alternating, plates on its back and four spikes on its tail end. The plates on its back ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chialingosaurus
''Chialingosaurus'' (meaning " Chialing Lizard") is a genus of herbivorous stegosaurian dinosaur similar to ''Kentrosaurus'' from the Upper Shaximiao Formation, Late Jurassic beds in Sichuan Province in China. Its age makes it one of the oldest species of stegosaurs, living about 160 million years ago. Since it was an herbivore, scientists think that ''Chialingosaurus'' probably ate ferns and cycads, which were plentiful during the period when ''Chialingosaurus'' was alive. Discovery and species The fossils of ''Chialingosaurus'' were collected by the geologist Kuan Yaowu or Guan Yao-Wu in 1957, at Taipingstai in Quxian County, while surveying the Chialing River in southern China. The type species ''Chialingosaurus kuani'' was named and described by paleontologist Yang Zhongjian, ("C. C. Young") two years later in 1959. The generic name refers to the Chialing. The specific name honours Kuan. ''Chialingosaurus'' was the first stegosaurian described from China.C.-C. Young, 195 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thyreosaurus
''Thyreosaurus'' is an extinct genus of stegosaurian dinosaur from the Middle Jurassic El Mers III Formation of Morocco. The genus contains a single species, ''Thyreosaurus atlasicus'', known form a partial disarticulated partial skeleton consisting of several dorsal vertebrae, ribs, a limb bone, and dermal bones. ''Thyreosaurus'' is characterized by a unique dermal armor with an asymmetrical texture, indicating that it may have been recumbent. Alongside ''Adratiklit'', ''Thyreosaurus'' increases the diversity of unique stegosaurs occurring in the Middle Jurassic of Africa. Discovery and naming The ''Thyreosaurus'' holotype specimen, HIIUC-BN00, was discovered in 2021 in sediments of the El Mers III Formation (El Mers Group, Boulahfa North locality) near Boulemane in the Middle Atlas mountains of Morocco. The specimen—which is associated but disarticulated—consists of nine dorsal vertebrae, 21 fragmentary ribs, a limb bone tentatively described as a fibula, and six ost ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adratiklit
''Adratiklit'' (meaning "mountain lizard") is an extinct genus of herbivorous stegosaurian Dinosaurs, dinosaur that lived on the supercontinent Gondwana during the Middle Jurassic period (168–164 million years ago). The genus contains a single species, ''Adratiklit boulahfa''. Its remains were found in the El Mers III Formation (Bathonian–?Callovian), near Boulahfa, south of Boulemane, Fès-Meknès, north Morocco. Eurypodan dinosaurs, in particular stegosaurs, were diverse and abundant in Laurasia (nowadays the northern continents) during the Jurassic, but their remains are extremely rare in deposits of Gondwana, (nowadays the southern continents). Nevertheless, the existence of fragmentary remains and trackways in the deposits of Gondwana indicate the presence of eurypodan taxa there. ''Adratiklit'' is the first described eurypodan taxon from North Africa, as well as—along with ''Thyreosaurus''—one of the oldest known stegosaurs (being similar in age to ''Bashanosaurus'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
