|
Stegouros
''Stegouros'' (, meaning "roofed tail") is an extinct genus of ankylosaurian dinosaurs from the Late Cretaceous Dorotea Formation of southern Chile. The genus contains a single species, ''Stegouros elengassen'', known from a semi-articulated, near-complete skeleton. ''Stegouros'' is a member of the Parankylosauria, a clade small Gondwanan armored dinosaurs. It is characterized by its small body size and distinct arrangement of fused osteoderms forming a maquahuitl-like tail weapon. Discovery In February 2018, the skeleton of a small ankylosaur was recovered by a team of Texan researchers near the Río de las Chinas valley of Última Esperanza Province, Ultima Esperanza province in the Magallanes Region, Magallanes y la Antártica Chilena region of southern Chile. In 2021, the type species ''Stegouros elengassen'' was named and described by Sergio Soto-Acuña et al. The generic name combines the Greek ''stegos'', meaning "roof" and ''oura'', meaning "tail", referring to the ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stegouros Elengassen
''Stegouros'' (, meaning "roofed tail") is an extinct genus of ankylosaurian dinosaurs from the Late Cretaceous Dorotea Formation of southern Chile. The genus contains a single species, ''Stegouros elengassen'', known from a semi-articulated, near-complete skeleton. ''Stegouros'' is a member of the Parankylosauria, a clade small Gondwanan armored dinosaurs. It is characterized by its small body size and distinct arrangement of fused osteoderms forming a maquahuitl-like tail weapon. Discovery In February 2018, the skeleton of a small ankylosaur was recovered by a team of Texan researchers near the Río de las Chinas valley of Ultima Esperanza province in the Magallanes y la Antártica Chilena region of southern Chile. In 2021, the type species ''Stegouros elengassen'' was named and described by Sergio Soto-Acuña et al. The generic name combines the Greek ''stegos'', meaning "roof" and ''oura'', meaning "tail", referring to the roof-like covering of the tail end. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctopelta
''Antarctopelta'' (; meaning 'Antarctic shield') is a genus of ankylosaurian dinosaur, a group of large, quadrupedal herbivores, that lived during the Maastrichtian stage of the Late Cretaceous period on what is now James Ross Island, Antarctica. ''Antarctopelta'' is the only known ankylosaur from Antarctica and a member of Parankylosauria. The only described specimen was found in 1986, the first dinosaur to be found on the continent, by Argentine geologists Eduardo Olivero and Robert Scasso. The fossils were later described in 2006 by paleontologists Leonardo Salgado and Zulma Gasparini, who named the type species ''A. oliveroi'' after Olivero. ''Antarctopelta'' is a medium-sized ankylosaur, reaching or more in length, and shows characteristics of two different families, making more precise classification difficult for many years. In 2021 a nearly complete skeleton of the similar Chilean genus ''Stegouros'' was described. This led to the recognition of Parankylosauria, containi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parankylosauria
Parankylosauria is a group of Basal (phylogenetics), basal ankylosaurian dinosaurs known from the Cretaceous of South America, Antarctica, and Australia. It is thought the group split from other ankylosaurs during the mid-Jurassic period, despite this being unpreserved in the fossil record. History of research During the Mesozoic era, the southern continents (South America, Antarctica, Australia, and Africa in addition to Indian subcontinent, India and Zealandia) were unified into a supercontinent known as Gondwana. This was in contrast to the supercontinent of Laurasia in the Northern Hemisphere, with both originating from the breakup of Pangaea. Gondwana itself gradually split apart over the course of the Jurassic and Cretaceous eras. Ankylosaurian dinosaurs from Laurasia have historically been far more extensively recorded and studied. Reports of the group in Gondwana date back to 1904, with a specimen from Australia and include referrals of ''Loricosaurus'', ''Lametasaurus'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kunbarrasaurus
''Kunbarrasaurus'' (meaning "shield lizard") is an extinct genus of small ankylosaurian dinosaur from the Cretaceous of Australia. The genus contains a Monotypic taxon, single species, ''K. ieversi''. Discovery In November 1989, at Marathon Station near Richmond, Queensland, the skeleton was discovered of an ankylosaurian. In January 1990 it was secured by a team led by Ralph Molnar. In 1996, in a provisional description, Molnar concluded that it could be referred to the genus ''Minmi (dinosaur), Minmi'' as a ''Minmi'' sp. Subsequently, the specimen was further prepared by an acid bath and investigated by a CAT scan. The new information led to the conclusion that the species could be named in a separate genus of ankylosaur. In 2015, Lucy G. Leahey, Ralph E. Molnar, Kenneth Carpenter, Lawrence M. Witmer and Steven W. Salisbury named and described the type species ''Kunbarrasaurus ieversi''. The genus name is derived from ''Kunbarra'' - the word for 'shield' in the Mayabic lan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankylosauria
Ankylosauria is a group of herbivorous dinosaurs of the clade Ornithischia. It includes the great majority of dinosaurs with armor in the form of bony osteoderms, similar to turtles. Ankylosaurs were bulky quadrupeds, with short, powerful limbs. They are known to have first appeared in North Africa during the Middle Jurassic, and persisted until the end of the Late Cretaceous. The two main families of ankylosaurians, Nodosauridae and Ankylosauridae primarily originated from the Northern Hemisphere (North America, Europe and Asia), but the more basal Parankylosauria originated from southern Gondwana (South America, Australia and Antarctica) during the Cretaceous. Ankylosauria was first named by Henry Fairfield Osborn in 1923.Osborn, H. F. (1923). "Two Lower Cretaceous dinosaurs of Mongolia." ''American Museum Novitates'', 95: 1–1/ref> In the Linnaean classification system, the group is usually considered either a suborder or an infraorder. It is contained within the group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2021 In Archosaur Paleontology
This article records new taxa of fossil archosaurs of every kind that was binomial nomenclature, described during the year 2021, as well as other significant discoveries and events related to paleontology of archosaurs that occurred in 2021. Pseudosuchians New pseudosuchian taxa General pseudosuchian research * A study on the phylogenetic relationships of pseudosuchian archosaurs, aiming to determine drivers of body size evolution in this group, is published by Stockdale & Michael Benton, Benton (2021); the study is subsequently criticized by Benson ''et al.'' (2022). * The first occurrence of the track type ''"Chirotherium" lulli'' (inferred to be produced by a pseudosuchian archosaur) from western North America is reported from the Owl Rock Member of the Chinle Formation (Utah, United States) by Milner ''et al.'' (2021). * A study on the skeletal anatomy and phylogenetic relationships of ''Revueltosaurus callenderi'' is published by Parker ''et al.'' (2021). * A study on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorotea Formation
The Dorotea Formation is a geological formation in the Río de Las Chinas Valley of the Magallanes Basin in Patagonian Chile whose strata date back to the Campanian to Maastrichtian of the Late Cretaceous.Dorotea Formation at .org Description The Dorotea Formation was first described by Katz in 1963. The formation comprises s with frequent conglomerate lenses, concretionary levels ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Postcranial Axial Skeleton Of Stegouros Elengassen
The postcranium ("behind the cranium"; plural: postcrania) or postcranial skeleton in zoology and vertebrate paleontology is the skeleton apart from the skull. The postcranium encompasses the axial skeleton, which includes the entirety of the vertebrae and ribs, and the appendicular skeleton The appendicular skeleton is the portion of the vertebrate endoskeleton consisting of the bones, cartilages and ligaments that support the paired appendages ( fins, flippers or limbs). In most terrestrial vertebrates (except snakes, legless li ..., which includes girdles and limbs. In paleontology, there may be disagreement over whether the skull and skeleton belong to the same or different animals. One example is the case of the dinosaur '' Nemegtosaurus'', which is known only from a skull that was found in the same geological formation as the related '' Opisthocoelicaudia'', which is only known from postcranial material. References Skeletal system {{Vertebrate anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comparison Of Teeth And Dentary Of Stegouros Elengassen And Antarctopelta Oliveroi
Comparison or comparing is the act of evaluating two or more things by determining the relevant, comparable characteristics of each thing, and then determining which characteristics of each are similar to the other, which are different, and to what degree. Where characteristics are different, the differences may then be evaluated to determine which thing is best suited for a particular purpose. The description of similarities and differences found between the two things is also called a comparison. Comparison can take many distinct forms, varying by field: To compare things, they must have characteristics that are similar enough in relevant ways to merit comparison. If two things are too different to compare in a useful way, an attempt to compare them is colloquially referred to in English as "comparing apples and oranges." Comparison is widely used in society, in science and the arts. General usage Comparison is a natural activity, which even animals engage in when decidin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
