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Lophorhothon
''Lophorhothon'' is a genus of hadrosauroid dinosaur from the Late Cretaceous, the first genus of dinosaur discovered in Alabama, in the United States. Discovery and naming Remains of this small, poorly known perhaps saurolophine dinosaur were first discovered during the 1940s, from extensive erosional outcrops of the lower unnamed member of the Mooreville Chalk Formation (Selma Group; lower and middle Campanian) in Dallas County, Alabama, Dallas County, west of the town of Selma, Alabama. The taxon has since also been reported from Black Creek Formation (Campanian) of North Carolina. The holotype, which is housed in the collections of the Field Museum of Natural History, Field Museum in Chicago, consists of a fragmentary and disarticulated skull and incomplete postcranial skeleton. The length on the holotype specimen has been estimated as . The genus was named by Wann Langston in 1960. It was thought to be the only species of hadrosaur from that fossil formation, until 2016 w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lophorhothon Atopus
''Lophorhothon'' is a genus of hadrosauroid dinosaur from the Late Cretaceous, the first genus of dinosaur discovered in Alabama, in the United States. Discovery and naming Remains of this small, poorly known perhaps saurolophine dinosaur were first discovered during the 1940s, from extensive erosional outcrops of the lower unnamed member of the Mooreville Chalk Formation (Selma Group; lower and middle Campanian) in Dallas County, west of the town of Selma, Alabama. The taxon has since also been reported from Black Creek Formation (Campanian) of North Carolina. The holotype, which is housed in the collections of the Field Museum in Chicago, consists of a fragmentary and disarticulated skull and incomplete postcranial skeleton. The length on the holotype specimen has been estimated as . The genus was named by Wann Langston in 1960. It was thought to be the only species of hadrosaur from that fossil formation, until 2016 with the discovery of the primitive hadrosaur, ''Eotracho ... [...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 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 of the Museum of the Rockies in 1992. The two species were differentiated mainly by crest size a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mooreville Chalk Formation
The Mooreville Chalk is a geological formation in North America, within the U.S. states of Alabama and Mississippi, which were part of the subcontinent of Appalachia. The strata date back to the early Santonian to the early Campanian stage of the Late Cretaceous. The chalk was formed by pelagic sediments deposited along the eastern edge of the Mississippi embayment. It is a unit of the Selma Group and consists of the upper Arcola Limestone Member and an unnamed lower member. Dinosaur, mosasaur, and primitive bird remains are among the fossils that have been recovered from the Mooreville Chalk Formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. . Fish Cartilaginous fish Bony fish Reptiles Dinosaurs Indeterminate hadrosaurid, nodosaurid, dinosaur egg, and ornithomimosaur fossil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrosaurs
Hadrosaurids (), 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. Hadrosaurids are descendants of the Upper Jurassic/Lower 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, South America and Antarctica. Like other ornithischians, hadrosaurids had a 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 structures known as dental batteries, which acted as effective g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrosaurid
Hadrosaurids (), 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. Hadrosaurids are descendants of the Upper Jurassic/Lower 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, South America and Antarctica. Like other ornithischians, hadrosaurids had a 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 structures known as dental batteries, which acted as effectiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eotrachodon Orientalis
''Eotrachodon orientalis'' (meaning "dawn ''Trachodon'' from the east") is a species of hadrosaurid that was described in 2016. The holotype was found in the Mooreville Chalk Formation (Upper Santonian) in Alabama in 2007 and includes a well-preserved skull and partial skeleton, making it a rare find among dinosaurs of Appalachia. Another primitive hadrosaur, ''Lophorhothon'', is also known from the same formation, although ''Eotrachodon'' lived a few million years prior. A phylogenetic study has found ''Eotrachodon'' to be the sister taxon to the hadrosaurid subfamilies Lambeosaurinae and Saurolophinae. This, along with the other Appalachian hadrosaur ''Hadrosaurus'' and possibly ''Lophorhothon'', ''Claosaurus'' and both species of ''Hypsibema'', suggests that Appalachia was the ancestral area of Hadrosauridae. See also * Timeline of hadrosaur research *2016 in paleontology Flora Plants Fungi Cnidarians Research * '' Yunnanoascus haikouensis'', previously thought t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Creek Formation
The Black Creek Group is a geologic group in North Carolina. It preserves fossils dating back to the Late Cretaceous period. Paleofauna * cf. '' Deinosuchus rugosus'' * cf. '' Coelosaurus antiquus'' * cf. '' Dryptosaurus sp.'' * cf. '' Lophorhoton atopus'' * ''Hypsibema crassicauda'' - "Caudal vertebrae, fragmentary humerus, fragmentary tibia, metatarsal II.""Table 20.1," in Weishampel, et al. (2004). Page 442. * Leptoceratopsidae indet. * Dromaeosauridae indet. See also * List of dinosaur-bearing rock formations * List of stratigraphic units with few dinosaur genera * List of fossiliferous stratigraphic units in North Carolina This article contains a list of fossil-bearing stratigraphic units in the state of North Carolina, U.S. Sites See also * Paleontology in North Carolina * Lists of fossiliferous stratigraphic units in the United States References * {{ ... References * Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrosauromorpha
Hadrosauromorpha is a clade of iguanodontian ornithopods, defined in 2014 by David B. Norman to divide Hadrosauroidea into the basal taxa with compressed manual bones and a pollex, and the derived taxa that lack them. The clade is defined as all the taxa closer to ''Edmontosaurus regalis'' than '' Probactrosaurus gobiensis''. This results in different taxon inclusion depending on the analysis. Classification Hadrosauromorpha was first used in literature by David B. Norman in 2014 in a discussion of phylogenetics of ''Hypselospinus''. In his 2014 paper Norman references another of his publications as the authority for Hadrosauromorpha, a chapter in the book ''Hadrosaurs''. However, the book was in fact published later, in 2015. Following Article 19.4 of the PhyloCode, the authorship of the clade is thus Norman (2015), while the authorship of the definition is Norman (2014). Definition Hadrosauromorpha was defined by Norman (2014 and 2015) as hadrosauroid taxa closer to ''Edmon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrosauroidea
Hadrosauroidea is a clade or superfamily of ornithischian dinosaurs that includes the "duck-billed" dinosaurs, or hadrosaurids, and all dinosaurs more closely related to them than to ''Iguanodon''. Their remains have been recovered in Asia, Europe, Africa and the Americas. Many primitive hadrosauroids, such as the Asian ''Probactrosaurus'' and ''Altirhinus'', have traditionally been included in a paraphyly, paraphyletic (unnatural grouping) "Iguanodontidae". With cladistics, cladistic analysis, the traditional Iguanodontidae has been largely disbanded, and probably includes only ''Iguanodon'' and perhaps its closest relatives. Classification The cladogram below follows an analysis by Andrew McDonald, 2012, and shows the position of Hadrosauroidea within Styracosterna. The cladogram below follows an analysis by Wu Wenhao and Pascal Godefroit (2012). Cladogram after Prieto-Marquez and Norell (2010). A phylogenetic analysis performed by Ramírez-Velasco ''et al.'' (2012) foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wann Langston
Wann Langston Jr. (1921 – April 7, 2013) was an American paleontologist and professor at the University of Texas at Austin. Langston worked on a number of different reptiles and amphibians in his long career, beginning with the 1950 description (with J. Willis Stovall) of the theropod dinosaur ''Acrocanthosaurus''. Langston was hired by the National Museum of Canada in 1954 to replace Charles M. Sternberg, and worked in western Canada and on Prince Edward Island until 1962. One of his major finds, with Loris Russell, was the rediscovery of Sternberg's Scabby Butte ''Pachyrhinosaurus'' bonebed. Langston, along with a small team of fieldworkers, excavated the Scabby Butte bonebed in 1957, securing several skulls and several hundred bones there. He then went on in 1963 to the University of Texas, where in 1969 he became the second director of the Vertebrate Paleontology Laboratory, where he worked on many projects, including work on Cretaceous vertebrates from Big Bend National ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrosauroid
Hadrosauroidea is a clade or superfamily of ornithischian dinosaurs that includes the "duck-billed" dinosaurs, or hadrosaurids, and all dinosaurs more closely related to them than to ''Iguanodon''. Their remains have been recovered in Asia, Europe, Africa and the Americas. Many primitive hadrosauroids, such as the Asian '' Probactrosaurus'' and '' Altirhinus'', have traditionally been included in a paraphyletic (unnatural grouping) "Iguanodontidae". With cladistic analysis, the traditional Iguanodontidae has been largely disbanded, and probably includes only ''Iguanodon'' and perhaps its closest relatives. Classification The cladogram below follows an analysis by Andrew McDonald, 2012, and shows the position of Hadrosauroidea within Styracosterna. The cladogram below follows an analysis by Wu Wenhao and Pascal Godefroit (2012). Cladogram after Prieto-Marquez and Norell (2010). A phylogenetic analysis performed by Ramírez-Velasco ''et al.'' (2012) found a large polytom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dallas County, Alabama
Dallas County is a county located in the central part of the U.S. state of Alabama. As of the 2020 census, its population was 38,462. The county seat is Selma. Its name is in honor of United States Secretary of the Treasury Alexander J. Dallas, who served from 1814 to 1816. Dallas County comprises the Selma, AL Micropolitan Statistical Area. History Dallas County was created by the Alabama territorial legislature on February 9, 1818, from Montgomery County. This was a portion of the Creek cession of lands to the US government of August 9, 1814. The Creek were known as one of the Five Civilized Tribes of the Southeast. The county was named for U.S. Treasury Secretary Alexander J. Dallas of Pennsylvania. Dallas County is located in what has become known as the Black Belt region of the west-central portion of the state. The name referred to its fertile soil, and the area was largely developed for cotton plantations, worked by enslaved African Americans in the antebellum pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
