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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] |
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] |
Bonapartesaurus
''Bonapartesaurus'' (meaning "Bonaparte's lizard", named after José Bonaparte) is an extinct genus of herbivorous ornithopod dinosaur belonging to Hadrosauridae, which lived in the area of modern Argentina during the Campanian and Maastrichtian stages of the Late Cretaceous. Discovery and naming The remains were excavated by the Argentine paleontologist Jaime Powell and collaborators in 1984 and described by him in 1987, where he identified the dinosaur remains as a possible "indeterminate lambeosaurine", comparing it mainly with the genera ''Hypacrosaurus'' and '' Barsboldia'' due to great size of the neural spines. In 2010, Rubén D. Juárez Valieri and his team erected a new genus and hadrosaurid species called '' Willinakaqe salitralensis'' from different materials found in 2 different locations (Salitral Moreno and Islas Malvinas) of the Allen Formation, which are mostly housed in the collection of the Carlos Ameghino Provincial Museum, where the specimen was examined by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secernosaurus
''Secernosaurus'' (meaning "severed lizard") is a genus of herbivorous dinosaur. ''Secernosaurus'' was a hadrosaur, a "duck-billed" dinosaur which lived during the Late Cretaceous. ''Secernosaurus'' and its close relatives lived in South America, unlike most hadrosaurs, which lived in the Laurasian continents of Eurasia and North America. It has been suggested that the ancestors of ''Secernosaurus'' crossed into South America when a land bridge temporarily formed between North and South America during the Late Cretaceous and allowed biotic interchange between the two continents. History of research The holotype of ''Secernosaurus koeneri'' was collected in 1923 as part of an expedition by the Field Museum led by J. B. Abbott. However, the specimen was not studied until the 1970s. In 1979, Brett-Surman named ''Secernosaurus''. Though hadrosaurid specimens from South America had been described before, ''Secernosaurus koeneri'' was the first species of South American hadrosaurid to ... [...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] |
Coahuilasaurus
''Coahuilasaurus'' (meaning "Coahuila lizard") is an extinct genus of kritosaurin ornithopod dinosaur from the Late Cretaceous (Campanian) Cerro del Pueblo Formation of Coahuila, Mexico. The genus contains a Monotypic taxon, single species, ''C. lipani'', known from the associated tips of the upper and lower jaw and other fragmentary skull bones. It is a large kritosaurin with an estimated body length of . Discovery and naming The holotype specimen, IGM 6685, is a partial skull. It was originally thought to belong to the same genus as PASAC 1, a large unnamed specimen known as the "Sabinas hadrosaurid", but this referral was later rejected. IGM 6685 was later referred to as a specimen of ''Kritosaurus''. IGM 6685 was later named as a new genus and species of kritosaurin hadrosaurid in 2024. The generic name, ''Coahuilasaurus'', honors the Mexican state of Coahuila, where the fossils were found. The specific name, ''lipani'', honors the Lépai-Ndé or Lipani, a tribe of Apache ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrosaurid
Hadrosaurids (), also hadrosaurs or duck-billed dinosaurs, are members of the ornithischian family Hadrosauridae. This group is known as the duck-billed dinosaurs for the flat duck-bill appearance of the bones in their snouts. The ornithopod family, which includes genera such as ''Edmontosaurus'' and ''Parasaurolophus'', was a common group of herbivores during the Late Cretaceous Period (geology), Period. Hadrosaurids are descendants of the Late Jurassic/Early Cretaceous iguanodontian dinosaurs and had a similar body layout. Hadrosaurs were among the most dominant herbivores during the Late Cretaceous in Asia and North America, and during the close of the Cretaceous several lineages dispersed into Europe, Africa, and South America. Like other ornithischians, hadrosaurids had a Glossary of dinosaur anatomy#predentary, predentary bone and a pubic bone which was positioned backwards in the pelvis. Unlike more primitive iguanodonts, the teeth of hadrosaurids are stacked into complex s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Augustynolophus
''Augustynolophus'' is an extinct genus of herbivorous saurolophine hadrosaur dinosaur which was discovered in the Moreno Formation in California, dating to the late Maastrichtian age, making it one of the last dinosaurs known from the fossil record before the Cretaceous–Paleogene extinction event. History of discovery The generic name derives from a combination of the Augustyn family, who helped support the Los Angeles County Museum, and the suffix "-lophus," meaning crest, a reference to its relative ''Saurolophus''. The specific name refers to palaeontologist William Morris. It was originally described as a species of ''Saurolophus'', ''S. morrisi''. However, when a more in-depth study took place, the end results revealed that its cranial structure was vastly different when it was juxtaposed with the other known members of the tribe Saurolophini, most notably ''Saurolophus osborni'' and ''Saurolophus angustirostris'' and '' Prosaurolophus maximus'' and therefore, it was det ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prosaurolophus
''Prosaurolophus'' (; meaning "before ''Saurolophus''", in comparison to the later dinosaur with a similar head crest) is a genus of hadrosaurid (or duck-billed) dinosaur from the Late Cretaceous of North America. It is known from the remains of at least 25 individuals belonging to two species, including skulls and skeletons, but it remains obscure. Its fossils have been found in the Campanian, late Campanian-age Upper Cretaceous Dinosaur Park Formation in Alberta, and the roughly contemporaneous Two Medicine Formation in Montana, dating to around 75.5-74.0 million years ago. Its most recognizable feature is a small solid crest formed by the nasal bones, sticking up in front of the eyes. The type species is ''P. maximus'', described by American paleontologist Barnum Brown of the American Museum of Natural History in 1916. A second species, ''P. blackfeetensis'', was described by Jack Horner (paleontologist), Jack Horner of the Museum of the Rockies in 1992. The two species w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laiyangosaurus
''Laiyangosaurus'' ("Laiyang lizard") is a genus of saurolophine hadrosaurid from the Late Cretaceous Jingangkou Formation of China. It is known from one species, ''L.youngi'', found in the Laiyang Basin within the province of Shandong. Classification ''Laiyangosaurus'' is a member of the saurolophine tribe Edmontosaurini. A number of specimens referred to ''Laiyangosaurus'' (IVPP V23405.1, V23403.1, V23402.1, V23404, V23402.7) apparently belong to kritosaurin and lambeosaurine hadrosaurids.Zhang, Yu-Guang; Wang, Ke-Bai; Chen, Shu-Qing; Liu, Di; Xing, Hai (2019). "Osteological Re‐assessment and Taxonomic Revision of "Tanius laiyangensis" (Ornithischia: Hadrosauroidea) from the Upper Cretaceous of Shandong, China". The Anatomical Record. doi:10.1002/ar.24097. Paleoenvironment The Wangshi Series of Shandong Province has yielded a considerable amount of fossil material, including the remains of insects, plants and other vertebrates, including dinosaurs and dinosaur eggs. See ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saurolophus
''Saurolophus'' (; meaning "lizard crest") is a genus of large hadrosaurid dinosaur from the Late Cretaceous period of Asia and North America, that lived in what is now the Horseshoe Canyon and Nemegt formations about 70 million to 66 million years ago. It is one of the few genera of dinosaurs known from multiple continents. The type species, ''S. osborni'', was described by Barnum Brown in 1912 from Canadian fossils. A second valid species, ''S. angustirostris'', is represented by numerous specimens from Mongolia, and was described by Anatoly Konstantinovich Rozhdestvensky. ''Saurolophus'' is distinguished by a spike-like crest which projects up and back from the skull. It was a herbivorous dinosaur which could move about either bipedally or quadrupedally. Discovery and history Barnum Brown recovered the first described remains of ''Saurolophus'' in 1911, including a nearly complete skeleton ( AMNH 5220). Now on display in the American Museum of Natural History, this skelet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinorex
''Rhinorex'' is a genus of kritosaurin hadrosaur from the Late Cretaceous Neslen Formation, in central Utah. Its exact placement in time is uncertain, though it probably dates to 75 million years ago and was discovered in estuarine sediments. T.A. Gates & R. Scheetz (2014): A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Campanian of Utah, North America ''Journal of Systematic Palaeontology''. doi: 10.1080/14772019.2014.950614 Discovery [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naashoibitosaurus
''Naashoibitosaurus'' (from Navajo —"creek lizard") is a genus of hadrosaurid dinosaur that lived about 73 million years ago, in the Late Cretaceous, and was found in the Kirtland Formation of the San Juan Basin in New Mexico, United States. Only a partial skeleton has been found to date. It was first described as a specimen of ''Kritosaurus'' by Jack Horner, and has been intertwined with ''Kritosaurus'' since its description. History Befitting a genus with a confusing taxonomic history, the name of this genus is based on an error. David Gillette and David Thomas collected the type and only known specimen from what was thought to be the Naashoibito Member of the Kirtland Formation, the youngest member of the Kirtland; this was commemorated in the name. Instead, it came from the older, late Campanian-age De-na-zin Member. Horner described the skull in 1992 as that of an immature ''Kritosaurus'', using it as evidence that ''Gryposaurus'' was different from ''Kritosaurus''. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
