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Saurolophines
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] |
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] |
Kerberosaurus
''Kerberosaurus'' (meaning " Kerberos lizard") was a genus of saurolophine duckbill dinosaur from the late Maastrichtian-age Upper Cretaceous Tsagayan Formation of Blagoveshchensk, Amur Region, Russia (dated to 66 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). It is based on bonebed material including skull remains indicating that it was related to ''Saurolophus'' and ''Prosaurolophus''. History In 1984, Yuri Bolotsky and the Amur Complex Integrated Research Institute discovered a large dinosaur bonebed at Blagoveschensk. Most of the remains were of ''Amurosaurus'' (a lambeosaurine hadrosaur), but some came from turtles, crocodilians, theropods, nodosaurids, and a saurolophine. The cranial material (holotype AENM 1/319, a braincase, and other skull bones) of the saurolophine wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subfamily (biology)
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zoological subfamily names with "-inae". Detarioideae is an example of a botanical subfamily. Detarioideae is a subdivision of the family Fabaceae (legumes), containing 84 genera. Stevardiinae is an example of a zoological subfamily. Stevardiinae is a large subdivision of the family Characidae, a diverse clade of freshwater fish. See also * International Code of Nomenclature for algae, fungi, and plants * International Code of Zoological Nomenclature The International Code of Zoological Nomenclature (ICZN) is a widely accepted Convention (norm), convention in zoology that rules the formal scientific name, scientific naming of organisms treated as animals. It is also informally known as the I ... * Rank (botany) * Rank (zoology) R ... [...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] |
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] |
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] |
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] |
Kritosaurus
''Kritosaurus'' is an incompletely known genus of hadrosaurid (duck-billed) dinosaur. It lived about 74.5-66 million years ago, in the Late Cretaceous of North America. The name means "separated lizard" (referring to the arrangement of the cheek bones in an incomplete type (biology), type skull), but is often mistranslated as "noble lizard" in reference to the presumed "hooknose, Roman nose" (in the original specimen, the nasal region was fragmented and disarticulated, and was originally restored flat). History of discovery In 1904, Barnum Brown discovered the holotype, type specimen (American Museum of Natural History, AMNH 5799) of ''Kritosaurus'' near the Ojo Alamo Formation, San Juan County, New Mexico, San Juan County, New Mexico, United States, while following up on a previous expedition. He initially could not definitely correlate the stratigraphy, but by 1916 was able to establish it as from what is now known as the Campanian, late Campanian-age De-na-zin Member of the K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gryposaurus
''Gryposaurus'' (meaning "hooked-nosed (Ancient Greek, Greek ''grypos'') lizard"; sometimes incorrectly translated as "griffin (Latin ''gryphus'') lizard") was a genus of hadrosaur, duckbilled dinosaur that lived about 80 to 75 million years ago, in the Late Cretaceous (late Santonian to late Campanian faunal stage, stages) of North America. Named species of ''Gryposaurus'' are known from the Dinosaur Park Formation in Alberta, Canada, and two formations in the United States: the Lower Two Medicine Formation in Montana and the Kaiparowits Formation of Utah. A possible additional species from the Javelina Formation in Texas may extend the temporal range of the genus to 66 million years ago. ''Gryposaurus'' is similar to ''Kritosaurus'', and for many years the two were thought to be synonyms. It is known from numerous skulls, some skeletons, and even some skin impressions that show it to have had pyramidal scales projecting along the midline of the back. It is most easily distingu ... [...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] |
