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Stygimys Cupressus
''Stygimys'' is an extinct mammal genus from the Upper Cretaceous and Paleocene of North America. It was a member of the extinct order Multituberculata within the suborder Cimolodonta, family Eucosmodontidae. The genus ''Stygimys'' ("Styx mouse") was named by R.E. Sloan and Leigh Van Valen in 1965. The name comes from the Styx (river of hell) from Greek mythology. The genus has also been known as ''Catopsalis'' (partly); ''Cimexomys'' (partly); '' Eucosmodon'' (partly); and ''Parectypodus'' (partly). Some skull material is known, but not much. Species The species ''Stygimys camptorhiza'' was named by P.A. Johnston and R.C. Fox in 1984. Place: Puercan (Paleocene)-age strata of Rav W-1 in Saskatchewan, Canada. The holotype for this species is in the University of Alberta collection. The species ''Stygimys cupressus'' was named by R.C. Fox in 1989. Remains are known from the Puercan (Paleocene)-age strata of the Long Fall Horizon of Canada. The species ''Stygimys jepseni'' was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammal
A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three Evolution of mammalian auditory ossicles, middle ear bones. These characteristics distinguish them from reptiles and birds, from which their ancestors Genetic divergence, diverged in the Carboniferous Period over 300 million years ago. Around 6,640 Neontology#Extant taxon, extant species of mammals have been described and divided into 27 Order (biology), orders. The study of mammals is called mammalogy. The largest orders of mammals, by number of species, are the rodents, bats, and eulipotyphlans (including hedgehogs, Mole (animal), moles and shrews). The next three are the primates (including humans, monkeys and lemurs), the Artiodactyl, even-toed ungulates (including pigs, camels, and whales), and the Carnivora (including Felidae, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parectypodus
''Parectypodus'' (meaning "besides ''Ectypodus''") is an extinct genus of mammals that lived from Late Cretaceous (Maastrichtian) to Eocene time in North America. It is a member of the extinct order of Multituberculata, suborder Cimolodonta, family Neoplagiaulacidae. It was named by G.L. Jepsen in 1930. Species *''Parectypodus armstrongi'' (Johnston, P.A. & Fox, R.C., 1984). From the Puercan (Paleocene) Ravenscrag Formation, site Rav W-1, Saskatchewan, Canada. This specimen resides in the collection of the University of Alberta. *''Parectypodus foxi'' (Storer, J.E., 1991). This Maastrichtian (Late Cretaceous)-age species from the Frenchman Formation of Saskatchewan is estimated to have weighed about 80 g. *''Parectypodus laytoni'' (Jepsen, G.L., 1940; Sloan, R.E., 1966), also known as ''Ectypodus laytoni'' (Jepsen 1940). Remains are known from the Lower Tiffanian (Middle-Late Paleocene) Princeton Quarry, Wyoming (United States). This species has been cited as a descendant of ''P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polecat Bench Formation
The Polecat Bench Formation is a geologic formation in Montana. It preserves fossils dating back to the Paleogene period.D. E. Russell. 1967. Le Paleocene continental d'Amerique du nord. Memoires du Museum National d'Histoire Naturelle. Serie C., ''Sciences de la Terre'' 16(2):37-99 The polyglyphanodontian lizard Lizard is the common name used for all Squamata, squamate reptiles other than snakes (and to a lesser extent amphisbaenians), encompassing over 7,000 species, ranging across all continents except Antarctica, as well as most Island#Oceanic isla ... '' Chamops'' is known from this formation. See also * List of fossiliferous stratigraphic units in Montana * Paleontology in Montana References Paleogene Montana Paleogene geology of Wyoming Thanetian Stage Ypresian Stage {{Paleogene-stub ... [...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] |
1930 In Paleontology
Plants Angiosperms Superrosids - Fabids ''Incertae sedis'' Arthropods Newly named insects Dinosaurs Lepidosauromorphs Newly named plesiosaurs Paleontologists * Death of William Diller Matthew. References {{portal, Paleontology [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montana
Montana ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, and the Provinces and territories of Canada, Canadian provinces of Alberta, British Columbia, and Saskatchewan to the north. It is the List of U.S. states and territories by area, fourth-largest state by area, but the List of U.S. states and territories by population, eighth-least populous state and the List of U.S. states and territories by population density, third-least densely populated state. Its List of capitals in the United States, capital is Helena, Montana, Helena, while the List of municipalities in Montana, most populous city is Billings, Montana, Billings. The western half of the state contains numerous mountain ranges, while the eastern half is characterized by western prairie terrain and badlands, with smaller mountain ranges f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1935 In Paleontology
Plants Conifers Flowering plants Arthropods Insects Sauropterygians New taxa Vertebrates Dinosaurs Synapsids Expeditions, field work, and fossil discoveries * Charles W. Gilmore, Charles Gilmore returned to prospect for fossils in the Two Medicine Formation.Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University Press, pp. 298–309. Institutions and organizations * The Calgary Public Museum of Alberta, Canada closed due to financial problems triggered by the Great Depression. By this point the museum had accumulated roughly 7500 different items of both natural and man-made origin. The collections were stored in another Calgary building called the Coste House.D. H. Tanke. 2010. Lost in plain sight: rediscovery of William E. Cutler's missing Eoceratops. In M. J. Ryan, B. J. Chinnery-Allgeier, D. A. Eberth (eds.), New Perspectives on Horned Dinosaurs: T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Gaylord Simpson
George Gaylord Simpson (June 16, 1902 – October 6, 1984) was an American paleontologist. Simpson was perhaps the most influential paleontologist of the twentieth century, and a major participant in the modern synthesis, contributing '' Tempo and Mode in Evolution'' (1944), ''The Meaning of Evolution'' (1949) and ''The Major Features of Evolution'' (1953). He was an expert on extinct mammals and their intercontinental migrations. Simpson was extraordinarily knowledgeable about Mesozoic fossil mammals and fossil mammals of North and South America. He anticipated such concepts as punctuated equilibrium (in ''Tempo and Mode'') and dispelled the myth that the evolution of the horse was a linear process culminating in the modern '' Equus caballus''. He coined the word '' hypodigm'' in 1940, and published extensively on the taxonomy of fossil and extant mammals. Simpson was influentially, and incorrectly, opposed to Alfred Wegener's theory of continental drift, but accepted the th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1989 In Paleontology
Plants Angiosperms Nymphaeales Arthropods Insects Dipterans Hemiptera Hymenoptera Mecoptera Conodonts German paleontologist and stratigrapher Heinz Walter Kozur (1942-2013) described the conodont genus ''Mesogondolella ''Mesogondolella'' is an extinct genus of conodonts. The species ''M. daheshenensis'' and ''M. subgracilis'' are from the Permian (probably Wordian) of the Daheshen Formation in China.The age of the Daheshen Formation in Jilin Province based o ...''. Sauropterygians Plesiosaurs Plesiosaur research *Plesiosaur gastroliths documented.Chatterjee and Small (1989). Sanders, Manley, and Carpenter (2001), "Table 12.1" page 167. Archosauriformes Archosauromorphs Pseudosuchians Non avian dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Birds Pterosaurs References {{portal, Paleontology * Chatterjee, Sankar and Small, Bryan J.; 1989; New plesiosaurs from the Upper Cretaceous of Antarctica; 47 pp. 197–2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Alberta
The University of Alberta (also known as U of A or UAlberta, ) is a public research university located in Edmonton, Alberta, Canada. It was founded in 1908 by Alexander Cameron Rutherford, the first premier of Alberta, and Henry Marshall Tory, the university's first president. It was enabled through the ''Post-secondary Learning Act.'' The university is considered a "comprehensive academic and research university" (CARU), which means that it offers a range of academic and professional programs that generally lead to undergraduate and graduate level credentials. The university comprises four campuses in Edmonton, an Augustana Campus in Camrose, Alberta, Camrose, and a staff centre in downtown Calgary. The original north campus consists of 150 buildings covering 50 city blocks on the south rim of the North Saskatchewan River valley parks system, North Saskatchewan River valley, across and west from downtown Edmonton. About 37,000 students from Canada and 150 other countries partici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype (Latin: ''holotypus'') is a single physical example (or illustration) of an organism used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany and mycology, an isotype is a duplicate of the holotype, generally pieces from the same individual plant or samples from the same genetic individual. A holotype is not necessarily "ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saskatchewan
Saskatchewan is a Provinces and territories of Canada, province in Western Canada. It is bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and to the south by the United States (Montana and North Dakota). Saskatchewan and neighbouring Alberta are the only landlocked provinces of Canada. In 2025, Saskatchewan's population was estimated at 1,250,909. Nearly 10% of Saskatchewan's total area of is fresh water, mostly rivers, reservoirs, and List of lakes in Saskatchewan, lakes. Residents live primarily in the southern prairie half of the province, while the northern half is mostly forested and sparsely populated. Roughly half live in the province's largest city, Saskatoon, or the provincial capital, Regina, Saskatchewan, Regina. Other notable cities include Prince Albert, Saskatchewan, Prince Albert, Moose Jaw, Yorkton, Swift Current, North Battleford, Estevan, Weyburn, Melfort, Saskatchewan, Melfort, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
