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Tomewingia
''Tomewingia'' is an extinct genus of rajiform ray from the Maastrichtian epoch of the Cretaceous period. It is known solely from isolated teeth from a single species, ''T. problematica.'' The genus is named for Thomas Ewing. The species was first described from the late Maastrichtian Kemp Clay Formation of Hunt County, Texas, but has since been found in Maastrichtian strata in the Arkadelphia Formation of Hot Spring County, Arkansas, the Severn Formation of Prince George's County, Maryland, and Fairpoint Member of the Fox Hills Formation in Meade County, South Dakota.Becker, M.A., Chamberlain, J.A. & Terry, D.O. (2004): Chondrichthyans from the Fairpoint Member of the Fox Hills Formation (Maastrichtian), Meade County, South Dakota. – Journal of Vertebrate Paleontology, 24 (4): 780-793. This genus was originally named '' Ewingia''; however, this name was found to be preoccupied by a mite found in the gills of certain land crabs. This rendered the name a junior homonym In b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Severn Formation
The Severn Formation is a Mesozoic geologic formation in Maryland. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607. Paleofauna Dinosaurs * '' "Coelosaurus" antiquus'' * Ornithomimidae indet. *Hadrosauridae indet. Plesiosaurs * '' Cimoliasaurus magnus'' Mosasaurs * '' Halisaurus platyspondylus'' * '' Prognathodon rapax'' * '' Mosasaurus hoffmanni'' * ''Mosasaurus sp''. * cf. ''Mosasaurus conodon'' * Mosasauridae indet. Crocodylomorphs * '' Deinosuchus rugosus'' * ''Thoracosaurus neocesariensis'' * Alligatorinae indet. Turtles * ''Peritresius ornatus'' * '' Osteopygis emarginatus'' * '' Trionyx priscus'' * Toxochelyidae indet. Chondrichthyans * '' Carcharias holmdelensis'' * '' Carcharias samhammeri'' * '' Chiloscyllium greeni'' * '' Cretalamana appendiculata'' * ''Dasyatis sp.'' * '' Tomewingia problematica'' * '' Galeorhinus garado ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rajiformes
Rajiformes is one of the four Order (biology), orders in the clade Batomorphi, often referred to as the superorder Batoidea, flattened cartilaginous fishes related to sharks. Rajiforms are distinguished by the presence of greatly enlarged pectoral fins, which reach as far forward as the sides of the head, with a generally flattened body. The undulatory pectoral fin motion diagnostic to this taxon is known as Batoid locomotion, rajiform locomotion. The eyes and Spiracle (vertebrates), spiracles are located on the upper surface of the head and the gill slits are on the underside of the body. Most species give birth to live young, although some lay eggs enclosed in a horny capsule ("mermaid's purse"). Characteristics Rajoids typically have a dorsoventrally flattened body. The snout is slender and pointed and the wide mouth, often covered with a fleshy nasal flap, is on the underside of the head. The eyes and well-developed spiracles are located on the top of the head. In most spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maastrichtian
The Maastrichtian ( ) is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (geology), age (uppermost stage (stratigraphy), stage) of the Late Cretaceous epoch (geology), Epoch or Upper Cretaceous series (stratigraphy), Series, the Cretaceous geologic period, Period or system (stratigraphy), System, and of the Mesozoic geologic era, Era or Erathem. It spanned the interval from . The Maastrichtian was preceded by the Campanian and succeeded by the Danian (part of the Paleogene and Paleocene). It is named after the city of Maastricht, the capital and largest city of the Limburg (Netherlands), Limburg province in the Netherlands. The Cretaceous–Paleogene extinction event (formerly known as the Cretaceous–Tertiary period, Tertiary extinction event) occurred at the end of this age. In this extinction event, mass extinction, many commonly recognized groups such as non-avian dinosaurs, plesiosaurs and mosasaurs, as well as many other lesser-kn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ninth and longest geological period of the entire Phanerozoic. The name is derived from the Latin , 'chalk', which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation . The Cretaceous was a period with a relatively warm climate, resulting in high Sea level#Local and eustatic, eustatic sea levels that created numerous shallow Inland sea (geology), inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was largely ice-free, although there is some evidence of brief periods of glaciation during the cooler first half, and forests extended to the poles. Many of the dominant taxonomic gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kemp Clay
The Kemp Clay is a geologic formation in Texas. It preserves fossils dating back to the Cretaceous period. See also * List of fossiliferous stratigraphic units in Texas * Paleontology in Texas Paleontology in Texas refers to paleontological research occurring within or conducted by people from the U.S. state of Texas. Author Marian Murray has said that "Texas is as big for fossils as it is for everything else." Some of the most import ... References * Geologic formations of Texas Cretaceous System of North America {{Cretaceous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunt County, Texas
Hunt County is a County (United States), county in the U.S. state of Texas. As of the 2020 United States census, 2020 census, its population was 99,956. Its county seat, seat of government is Greenville, Texas, Greenville. The county is named for Memucan Hunt, Jr., the first Republic of Texas Minister to the United States from 1837 to 1838 and the third Texas Secretary of the Navy from 1838 to 1839. Hunt County is located in Northeast Texas, at the eastern edge of the Dallas/Fort Worth Metroplex, and the western edge of East Texas. Geography Hunt County is located in Northeast Texas, and by extension, a part of East Texas. The Piney Woods begin in the eastern portion of the county. According to the U.S. Census Bureau, the county has a total area of , of which (4.7%) are covered by water. Lakes * Lake Tawakoni Major highways * Interstate 30 in Texas, Interstate 30 * U.S. Route 67 in Texas, U.S. Highway 67 * U.S. Route 69 in Texas, U.S. Highway 69 * U.S. Route 380 (Texas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arkadelphia Formation
The Arkadelphia Marl, also called the Arkadelphia Formation, is a Formation (geology), geologic formation in Arkansas in Clark County, Arkansas, Clark, Nevada County, Arkansas, Nevada, and Hempstead County, Arkansas, Hempstead counties. It preserves fossils dating back to the late Maastrichtian stage of the Cretaceous Period (geology), period. Paleofauna Bony fish Ray fish, Rays Sharks See also * List of fossiliferous stratigraphic units in Arkansas * Paleontology in Arkansas References * Cretaceous Arkansas {{Cretaceous-stub Marl formations Geologic formations of Arkansas Fossiliferous stratigraphic units of North America Maastrichtian Stage of North America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hot Spring County, Arkansas
Hot Spring County, officially the County of Hot Spring, is a county located in the U.S. state of Arkansas. As of the 2020 census, the population was 33,040. The county seat is Malvern. Established on November 2, 1829, in the Arkansas Territory from a part of Clark County; it was named after the hot springs at Hot Springs, Arkansas, which were formerly in the county. The creation of Garland County in 1873 detached the town of Hot Springs to the newly created county. For nearly 80 years, Hot Spring County was an alcohol prohibition or dry county, though attempts in recent years to locate the county prohibition ordinance were unsuccessful. In November 2022, voters overturned the prohibition, approving a measure to allow countywide retail alcohol sales. Hot Spring County comprises the Malvern, AR Micropolitan Statistical Area, which is included in the Hot Springs-Malvern, AR Combined Statistical Area. Geography Hot Spring County is located in Southwest Arkansas, a region ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince George's County, Maryland
Prince George's County (often shortened to PG County or PG) is located in the U.S. state of Maryland bordering the eastern portion of Washington, D.C. As of the 2020 United States census, 2020 U.S. census, the population was 967,201, making it the second-most populous List of counties in Maryland, county in Maryland, behind neighboring Montgomery County, Maryland, Montgomery County. The 2020 census counted an increase of nearly 104,000 in the previous ten years. Its county seat is Upper Marlboro, Maryland, Upper Marlboro. It is the most populous List of U.S. counties with African-American majority populations in 2010, African American-majority county in the United States, as well as the second most affluent behind neighboring Charles County, Maryland, Charles County. The county (United States), county is part of the Washington metropolitan area, Capital region of the state, though portions of the county are considered to be in Southern Maryland. The county also hosts many feder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fox Hills Formation
The Fox Hills Formation is a Cretaceous geologic formation in the northwestern Great Plains of North America. It is present from Alberta on the north to Colorado in the south. Fossil remains of dinosaurs, including tyrannosaurs, as well as large marine reptiles, such as mosasaurs, have been recovered from the formation. Lithology The Fox Hills Formation consists of marginal marine yellow to grey sandstone with shale interbeds. It was deposited as a regressive sequence of barrier islands during the retreat of the Western Interior Seaway in Late Cretaceous time. In its eastern extent, the formation is underlain by the marine Pierre Shale in the United States and by the equivalent Bearpaw Formation in Canada, while in western ranges in Montana and Wyoming it overlies the Lewis Shale. The Fox Hills is overlain by continental sediments of the Laramie Formation in Colorado and the Lance Formation in Wyoming, the latter being the equivalent of the overlying Hell Creek Formation i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meade County, South Dakota
Meade County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 29,852, making it the 6th most populous county in South Dakota. Its county seat is Sturgis. The county was created in 1889 and named for Fort Meade, which was garrisoned as a United States military post in the area in 1878 and itself named for General George Meade. Meade County is part of the Rapid City metropolitan area. Geography The upper part of Meade County is drained by Cherry Creek. The Cheyenne River flows northeastward along the southeast boundary of the county. The county terrain has mountain ridges in the west and southwest areas, with the remainder consisting of semi-arid rolling hills, partly dedicated to agriculture. The county terrain slopes to the east and northeast; its highest point Flagstaff Mountain is near the southwest corner, at ASL. The county has an area of , of which is land and (0.3%) is water. It is South Dakota's largest county by area. Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ewingia
''Ewingia'' is a genus of mites in the family Acaridae The Acaridae are a family of mites in order Sarcoptiformes. Distribution There are several acarid genera with cosmopolitan distributions, such as ''Acarus', Sancassania'' and ''Tyrophagus''. Ecology Acaridae live in various habitats an .... Species * '' Ewingia cenobitae'' Pearse, 1929 * '' Ewingia potamona'' Kaneko & Kadosaka, 1978 References Acaridae {{Sarcoptiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
