|
Gilmoremys
''Gilmoremys'' is an extinct genus of softshell turtle which lived during the late Cretaceous (Maastrichtian stage) of North Dakota, Montana and Wyoming, United States. Remains ''Gilmoremys'' is known from five skulls, a mandible and an incomplete postcranial skeleton. The holotype of ''G. lancensis'', USNM 6727, consists of a nearly complete carapace and an isolated hyoplastral fragment, was first assigned to the species '' Aspideretes lancensis''. Many additional specimens were later discovered including cranial remains, and the material was assigned to its own genus, ''Gilmoremys''. It was found from the Hell Creek Formation and from the Lance Formation (only the holotype). It was first named by Walter G. Joyce and Tyler R. Lyson in 2011 and the type species is ''Gilmoremys lancensis''. The generic name honors Dr. Charles W. Gilmore. A second species, ''G. gettyspherensis'', is known from the late Campanian Fruitland Formation of New Mexico. Morphology Juvenil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hutchemys
''Hutchemys'' is an extinct genus of softshell turtles from the late Cretaceous (Maastrichtian stage) to the late Paleocene of New Mexico, Montana, Wyoming, Utah, and North Dakota, United States. It was first named by Walter G. Joyce, Ariel Revan, Tyler R. Lyson and Igor G. Danilov in 2009, and the type species is ''Hutchemys rememdium''. ''H. rememdium'' is known from the holotype YPM PU 16795, which consists of a nearly complete postcranial skeleton, and from the referred specimen YPM PU 16781, found in the Ekalaka Member of the Fort Union Formation, Montana. Another referred specimen, YPM PU 14985, was found in the Cedar Point Quarry, Wyoming. The second species, ''H. arctochelys'', is known from the holotype YPM PU 16319, a nearly complete carapace, and from the paratypes YPM PU 16320, YPM PU 16321, YPM PU 16322, YPM PU 16238. All specimens of ''H. arctochelys'' were recovered from the same quarr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2011 In Paleontology
Protozoa New taxa Plants Ferns and fern allies Gymnosperms Gymnosperm research *An amplified whole plant reconstruction of the Ypresian Princeton chert pine ''Pinus arnoldii'', expanding the diagnosis to include ''P. similkameenensis'' (Miller, 1973 in paleontology, 1973) foliage and wood plus unnamed pollens cones found in attachment to the ''P. arnoldii'' ovulate cones is published by Klymiuk, Stockey, & Rothwell. Angiosperms Nematoda Lobopods Vetulicolians Molluscs Arthropods Fishes Amphibians Newly named lepospondyls Newly named temnospondyls Newly named lissamphibians Basal reptiles Newly named captorhinids Newly named basal diapsids Newly named ichthyosaurs Lepidosauromorphs Newly named saurosphargids Newly named sauropterygians Newly named lizards Newly named snakes Turtles Newly named turtles Archosauromorphs Newly named basal archosauromorphs Archosaurs Synapsids Newly named non-mammalian synapsids Mammals Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastomenus
''Plastomenus'' is an extinct genus of turtle that inhabited western North America during the early Paleogene period. Evolution ''Plastomenus'' belongs to the clade Pantrionychidae, represented by softshell turtles in modern times. It is the type genus of the subfamily Plastomeninae (also treated as the family Plastomenidae), a group of extinct turtles that lived from the Late Cretaceous to the Eocene. The type species, ''P. thomasii'', was first described by Edward Drinker Cope in 1872. The following species are known: * †''P. joycei'' Lyson, Petermann & Miller, 2021 - Early Paleocene of Colorado, USA (Denver Formation) * †''P. thomasii'' (Cope, 1872) - Early to Middle Eocene (Ypresian to Lutetian The Lutetian is, in the geologic timescale, a stage (stratigraphy), stage or age (geology), age in the Eocene. It spans the time between . The Lutetian is preceded by the Ypresian and is followed by the Bartonian. Together with the Bartonian it ...) of Wyoming, USA ( Brid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trionychidae
Trionychidae is a family of turtles, commonly known as softshell turtles or simply softshells. The family was described by Leopold Fitzinger in 1826. Softshells include some of the world's largest freshwater turtles, though many can adapt to living in highly brackish waters. Members of this family occur in Africa, Asia, and North America, with extinct species known from Australia. Most species have traditionally been included in the genus '' Trionyx'', but the vast majority have since been moved to other genera. Among these are the North American '' Apalone'' softshells that were placed in ''Trionyx'' until 1987. Characteristics Turtles of the family Trionychidae are called "softshell" because their carapaces lack horny scutes (scales), though the spiny softshell, '' Apalone spinifera'', does have some scale-like projections, to which its common name refers. The carapace is leathery and pliable, particularly at the sides. The central part of the carapace has a layer of solid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastomeninae
Plastomeninae is an Extinction, extinct subfamily of Trionychidae, softshell turtles that inhabited most of North America from the Cretaceous to the Eocene. Members of this subfamily are also known as plastomenines. Taxonomy and evolution They are thought to have originated in North America during or shortly before the Campanian from basal Trionychidae, trionychids that dispersed from Asia. They reached their peak diversity from the Maastrichtian through the Paleocene, having survived the Cretaceous–Paleogene extinction event. However, they went entirely extinct by the Lutetian. The last surviving member of this subfamily is thought to have been ''Plastomenus thomasii'', which is the only known member of the subfamily to have survived past the Paleocene into the Eocene. Morphological analysis supports them being the Sister group, sister taxon to the Cyclanorbinae, flapshell turtles (subfamily Cyclanorbinae), which still survive to the present day in parts of tropical Asia an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclanorbinae
Cyclanorbinae, also known commonly as the flapshell turtles, is a subfamily of softshell turtles in the family Trionychidae. The subfamily is native to Africa and Asia. Taxonomy Morphological evidence supports Cyclanorbinae being the sister group to the Plastomeninae, an extinct subfamily of softshell turtles that inhabited North America from the Cretaceous to the Eocene. Genera The subfamily Cyclanorbinae contains the following three extant genera.Turtle Taxonomy Working Group (Rhodin, Anders G.J.; Parham, James F.; van Dijk, Peter Paul; Iverson, John B.) (2009"Turtles of the World: Annotated Checklist of Taxonomy and Synonymy, 2009 Update". ''Chelonian Research Monographs'' (5): 000.39-000.84. (Cyclanorbinae, pp. 000.55-000.56). *'' Cyclanorbis'' *'' Cycloderma'' *''Lissemys'' One extinct prehistoric genus is also known from fossil remains: '' Nemegtemys'' , from the Cretaceous of Mongolia. Geographic range Species A species () is often defined as the largest gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trionychinae
The Trionychinae are a subfamily of turtles in the family Trionychidae. Classification The subfamily has 11 extant genera: *''Amyda'' *''Apalone'' *''Axestemys'' *''Chitra (turtle), Chitra'' *''Dogania'' *''Drazinderetes'' *''Gobiapalone'' *''Khunnuchelys'' *''Murgonemys'' *''Nilssonia (turtle), Nilssonia'' *''Oliveremys'' *''Palea (turtle), Palea'' *''Palaeoamyda'' *''Pelochelys'' *''Pelodiscus'' *''Rafetoides'' (nomen dubium) *''Rafetus'' *''Trionyx'' References {{Taxonbar, from=Q2036081 Trionychinae, Reptile subfamilies Taxa named by John Edward Gray ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladogram
A cladogram (from Greek language, Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an Phylogenetic tree, evolutionary tree because it does not show how ancestors are related to descendants, nor does it show how much they have changed, so many differing evolutionary trees can be consistent with the same cladogram. A cladogram uses lines that branch off in different directions ending at a clade, a group of organisms with a last common ancestor. There are many shapes of cladograms but they all have lines that branch off from other lines. The lines can be traced back to where they branch off. These branching off points represent a hypothetical ancestor (not an actual entity) which can be inferred to exhibit the traits shared among the terminal taxa above it. This hypothetical ancestor might then provide clues about the order of evolution of various features, adaptation, and other e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carter County, Montana
Carter County is a County (United States), county located in the U.S. state of Montana. As of the 2020 United States census, 2020 census, the population was 1,415, making it the seventh-least populous county in Montana. The county seat is Ekalaka, Montana, Ekalaka. History Carter County was named for Thomas H. Carter, Thomas Henry Carter, the state's first congressman (representative in Congress from the Montana Territory, followed by first representative from the state of Montana to the US House of Representatives). Prior to settlement the land of Carter County was occupied by the Sioux Indians, Sioux tribe. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (0.2%) is water. Medicine Rocks State Park is located 14 miles north of Ekalaka. Weathering has given the rocks an unusual texture. The site was used by Indian hunting parties. Adjacent counties * Powder River County, Montana, Powder River County - west * Cus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fruitland Formation
The Fruitland Formation is a geologic formation found in the San Juan Basin in the states of New Mexico and Colorado, in the United States of America. It contains fossils dating it to the Campanian age of the late Cretaceous.Fruitland Formation at .org The Fruitland Formation shares its name with . That city is on what was the western shore of the |
Charles W
The F/V ''Charles W'', also known as Annie J Larsen, is a historic fishing schooner anchored in Petersburg, Alaska. At the time of its retirement in 2000, it was the oldest fishing vessel in the fishing fleet of Southeast Alaska, and the only known wooden fishing vessel in the entire state still in active service. Launched in 1907, she was first used in the halibut fisheries of Puget Sound and the Bering Sea as the ''Annie J Larsen''. In 1925 she was purchased by the Alaska Glacier Seafood Company, refitted for shrimp trawling, and renamed ''Charles W'' in honor of owner Karl Sifferman's father. The company was one of the pioneers of the local shrimp fishery, a business it began to phase out due to increasing competition in the 1970s. The ''Charles W'' was the last of the company's fleet of ships, which numbered twelve at its height. The boat was acquired in 2002 by the nonprofit Friends of the ''Charles W''. The boat was listed on the National Register of Historic Place ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lance Formation
The Lance (Creek) Formation is a division of Late Cretaceous (dating to about 69–66 Ma) rocks in the western United States. Named after Lance Creek, Wyoming, the microvertebrate fossils and dinosaurs represent important components of the latest Mesozoic vertebrate faunas. The Lance Formation is Late Maastrichtian in age (Lancian NALMA, land mammal age), and shares much fauna with the Hell Creek Formation of Montana and North Dakota, the Frenchman Formation of southwest Saskatchewan, and the lower part of the Scollard Formation of Alberta. The Lance Formation occurs above the ''Baculites clinolobatus'' ammonite marine zone in Wyoming, the top of which has been dated to about 69 million years ago, and extends to the K-Pg boundary, 66 million years ago. However, the characteristic land vertebrate fauna of the Lancian age (which take its name from this formation) is only found in the upper strata of the Lance, roughly corresponding to the thinner equivalent formations such as the H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
