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Kelumapusaura
''Kelumapusaura'' (meaning "red earth lizard") is a genus of saurolophine hadrosaur from the Late Cretaceous Allen Formation in what is now Patagonia in Argentina. The type and only species is ''K. machi'', known from a bonebed of various individuals. Discovery The generic name, "''Kelumapusaura''," combines "kelumapu," the Mapudungun word for "red earth," and the feminine form of the Greek "sauros," meaning "lizard." The specific name, "'' machi''," is derived from a word from the Mapuche people for "shaman." Description The describing authors estimate that ''Kelumapusaura'' would have been long. Classification Rozadilla ''et al''. (2022) named ''Kelumapusaura'' and the closely related '' Huallasaurus'', recovering them in a clade of entirely South American saurolophines. In the 2023 description of the South American hadrosauroid '' Gonkoken'', Alarcón-Muñoz ''et al''. recovered similar results, implementing a modified version of the phylogenetic matrix of Rozadilla ''et a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huallasaurus
''Huallasaurus'' (meaning "duck lizard") is an extinct genus of saurolophine hadrosaur from the Late Cretaceous Los Alamitos Formation of Patagonia in Argentina. The type and only species is ''H. australis''. Originally named as a species of ''Kritosaurus'' in 1984, it was long considered a synonym of ''Secernosaurus'' before being recognized as its own distinct genus in a 2022 study, different from other members of Kritosaurini. Discovery The generic name, "''Huallasaurus''," combines "hualla," the Mapudungun word for "duck," and the Greek "sauros," meaning "lizard." The specific name, "''australis''," is derived from the Latin "australis," meaning "southern," after the discovery of the holotype specimen in southern Argentina. Classification Rozadilla ''et al''. (2022) named ''Huallasaurus'' and the closely related ''Kelumapusaura'', recovering them in a clade of entirely South American saurolophines. In the 2023 description of the South American hadrosauroid '' Gonkoken'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kritosaurini
Saurolophinae is a subfamily of hadrosaurid dinosaurs. It has since the mid-20th century generally been called the Hadrosaurinae, a group of largely non-crested hadrosaurs related to the crested sub-family Lambeosaurinae. However, the name Hadrosaurinae is based on the genus ''Hadrosaurus'' which was found in more recent studies to be more primitive than either lambeosaurines or other traditional "hadrosaurines", like ''Edmontosaurus'' and ''Saurolophus''. As a result of this, the name Hadrosaurinae was dropped or restricted to ''Hadrosaurus'' alone, and the subfamily comprising the traditional "hadrosaurines" was renamed the Saurolophinae. Recent phylogenetic work by Hai Xing indicates that ''Hadrosaurus'' is placed within the monophyletic group containing all non-lambeosaurine hadrosaurids. Under this view, the traditional Hadrosaurinae is resurrected, with the Hadrosauridae being divided into two clades: Hadrosaurinae and Lambeosaurinae. Classification Saurolophinae was first d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saurolophinae
Saurolophinae is a subfamily (biology), subfamily of hadrosaurid dinosaurs. It has since the mid-20th century generally been called the Hadrosaurinae, a group of largely non-crested hadrosaurs related to the crested sub-family Lambeosaurinae. However, the name Hadrosaurinae is based on the genus ''Hadrosaurus'' which was found in more recent studies to be more primitive than either lambeosaurines or other traditional "hadrosaurines", like ''Edmontosaurus'' and ''Saurolophus''. As a result of this, the name Hadrosaurinae was dropped or restricted to ''Hadrosaurus'' alone, and the subfamily comprising the traditional "hadrosaurines" was renamed the Saurolophinae. Recent phylogenetic work by Hai Xing indicates that ''Hadrosaurus'' is placed within the monophyletic group containing all non-lambeosaurine hadrosaurids. Under this view, the traditional Hadrosaurinae is resurrected, with the Hadrosauridae being divided into two clades: Hadrosaurinae and Lambeosaurinae. Classification Saur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austrokritosauria
Saurolophinae is a subfamily of hadrosaurid dinosaurs. It has since the mid-20th century generally been called the Hadrosaurinae, a group of largely non-crested hadrosaurs related to the crested sub-family Lambeosaurinae. However, the name Hadrosaurinae is based on the genus ''Hadrosaurus'' which was found in more recent studies to be more primitive than either lambeosaurines or other traditional "hadrosaurines", like ''Edmontosaurus'' and ''Saurolophus''. As a result of this, the name Hadrosaurinae was dropped or restricted to ''Hadrosaurus'' alone, and the subfamily comprising the traditional "hadrosaurines" was renamed the Saurolophinae. Recent phylogenetic work by Hai Xing indicates that ''Hadrosaurus'' is placed within the monophyletic group containing all non-lambeosaurine hadrosaurids. Under this view, the traditional Hadrosaurinae is resurrected, with the Hadrosauridae being divided into two clades: Hadrosaurinae and Lambeosaurinae. Classification Saurolophinae was first d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saurolophine
Saurolophinae is a subfamily (biology), subfamily of hadrosaurid dinosaurs. It has since the mid-20th century generally been called the Hadrosaurinae, a group of largely non-crested hadrosaurs related to the crested sub-family Lambeosaurinae. However, the name Hadrosaurinae is based on the genus ''Hadrosaurus'' which was found in more recent studies to be more primitive than either lambeosaurines or other traditional "hadrosaurines", like ''Edmontosaurus'' and ''Saurolophus''. As a result of this, the name Hadrosaurinae was dropped or restricted to ''Hadrosaurus'' alone, and the subfamily comprising the traditional "hadrosaurines" was renamed the Saurolophinae. Recent phylogenetic work by Hai Xing indicates that ''Hadrosaurus'' is placed within the monophyletic group containing all non-lambeosaurine hadrosaurids. Under this view, the traditional Hadrosaurinae is resurrected, with the Hadrosauridae being divided into two clades: Hadrosaurinae and Lambeosaurinae. Classification Saur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonkoken
''Gonkoken'' (meaning "similar to a wild duck or swan") is an extinct genus of hadrosauroid ornithopod dinosaur from the Late Cretaceous Dorotea Formation of Chilean Patagonia. The genus contains a single species, ''G. nanoi'', known from disarticulated bones of multiple individuals. Discovery and naming The ''Gonkoken'' fossil specimens were discovered beginning in 2013 in sediments of the Dorotea Formation in the Río de las Chinas Valley, Estancia Cerro Guido, in Magallanes Region, Chile. The holotype specimen, CPAP 3054, consists of a right ilium. Additional material assigned as paratype includes the disarticulated bones of at least three individuals. These bones include skull material, cervical, dorsal, and caudal vertebrae, ribs, partial pectoral and pelvic girdles, and arm and leg bones. In 2023, Alarcón-Muñoz ''et al''. described ''Gonkoken nanoi'' as a new genus and species of hadrosauroid ornithopod based on these fossil remains. The generic name, "''Gonkoken''" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allen Formation
The Allen Formation is a geological formation in Argentina whose strata date back to the Late Cretaceous (middle Campanian to early Maastrichtian.Salgado et al., 2007 Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 600-604. . Indeterminate chelid remains and other vertebrates have also been discovered in this formation. Description Uliana and Dellapé defined the formation's stratotype in 1981 in the eastern area of the Bajo de Añelo, where the relation between the base and top is clearly exposed. The deposits are mostly clastic, interbedded with banks of limestone and layers of anhydrite, which were defined as continental and shallow marine facies associated with semiarid conditions.Armas & Sánchez, 2015, p.1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2022 In Archosaur Paleontology
This article records new taxa of fossil archosaurs of every kind Binomial nomenclature, described during the year 2022, as well as other significant discoveries and events related to paleontology of archosaurs that occurred in 2022. Pseudosuchians New pseudosuchian taxa General pseudosuchian research * A study on the mandible embryogenesis in extant caimans, and on its implications for the knowledge of the evolution of postdentary lower jaw of pseudosuchians, is published by Bona ''et al.'' (2022). * A study on the musculature of crocodylian and fossil suchian jaws, investigating the impact of the flattening of the skulls of suchians in their evolutionary history on their muscle anatomy, is published by Sellers ''et al.'' (2022). * Revision of ''Tsylmosuchus donensis'' and ''Scythosuchus basileus'' is published by Sennikov (2022), who interprets the latter taxon as a Synonym (taxonomy), junior synonym of the former one, and interprets ''T. donensis'' as a likely member o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maiasaura
''Maiasaura'' (from the Greek ''μαῖα'', meaning "midwife" and ''σαύρα'', the feminine form of ''saurus'', meaning "reptile") is a large herbivorous saurolophine hadrosaurid ("duck-billed") dinosaur genus that lived in the area currently covered by the state of Montana and the Canadian province of Alberta, in the Upper Cretaceous Period (mid to late Campanian), from 86.3 to 70.6 million years ago.Horner, J. R., Schmitt, J. G., Jackson, F., & Hanna, R. (2001). Bones and rocks of the Upper Cretaceous Two Medicine-Judith River clastic wedge complex, Montana. In Field trip guidebook, Society of Vertebrate Paleontology 61st Annual Meeting: Mesozoic and Cenozoic Paleontology in the Western Plains and Rocky Mountains. Museum of the Rockies Occasional Paper (Vol. 3, pp. 3-14). ''Maiasaura peeblesorum'' is the state fossil of Montana. The first remains of ''Maiasaura'' ''peeblesorum'' were discovered in the Two Medicine Formation near Chouteau, Montana in 1978 by Bynum, Montana r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acristavus Gagslarsoni
''Acristavus'' (meaning "non-crested grandfather") is a genus of saurolophine dinosaur. Fossils have been found from the Campanian Two Medicine Formation in Montana and Wahweap Formation in Utah, United States. The type species ''A. gagslarsoni'' was named in 2011. Unlike nearly all hadrosaurids except ''Edmontosaurus'', ''Acristavus'' lacked ornamentation on its skull. The discovery of ''Acristavus'' is paleontologically significant because it supports the position that the ancestor of all hadrosaurids did not possess cranial ornamentation, and that ornamentation was an adaptation that later arose interdependently in the subfamilies Saurolophinae and Lambeosaurinae. It is closely related to ''Brachylophosaurus'' and ''Maiasaura'', and was assigned to a new clade called Brachylophosaurini. Discovery and occurrence The holotype specimen of ''Acristavus'', MOR 1155, was recovered at the Two Medicine Formation, in Teton County, Montana. The specimen was collected in 1999 by C. Ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wulagasaurus Dongi
''Wulagasaurus'' (meaning "Wulaga lizard", in reference to the discovery locality) is a genus of saurolophine hadrosaurid dinosaur from the Late Cretaceous of Heilongjiang, China. Discovery Its remains were found in a bonebed in the middle Maastrichtian-age Yuliangze Formation, dated to 69 million years ago.Godefroit, P., Lauters, P., Van Itterbeeck, J., Bolotsky, Y. and Bolotsky, I.Y. (2011). "Recent advances on study of hadrosaurid dinosaurs in Heilongjiang (Amur) River area between China and Russia." ''Global Geology'', 2011(3). This bonebed is otherwise dominated by fossils of the lambeosaurine hadrosaurid (hollow-crested duckbill) ''Sahaliyania''. ''Wulagasaurus'' was named by Pascal Godefroit and colleagues in 2008. Only partial remains are known at this time. It is one of several hadrosaurids from the Amur River region named since 2000. The type and only species to date is ''W. dongi'', named in honor of Chinese paleontologist Dong Zhiming. ''Wulagasaurus'' is based ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
