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Orientalosuchina
Orientalosuchina is an extinct clade of alligatoroid crocodylians from South and East Asia that lived during the Paleocene and Eocene. The clade was named as the result of a 2019 study by Massonne ''et al.'' that included several extinct alligatoroid taxa from Asia and found that they were all closely related and together formed a monophyletic clade as basal members of Alligatoroidea, as shown in the cladogram below: Some studies have disputed this placement of ''Jiangxisuchus'' within Orientalosuchina as an alligatoroid, instead recovering ''Jiangxisuchus'' as a basal member of Crocodyloidea Crocodyloidea is one of three superfamilies of crocodilians, the other two being Alligatoroidea and Gavialoidea, and it includes the crocodiles. Crocodyloidea may also include the extinct Mekosuchinae, native to Australasia from the Eocene to th .... References Crocodilians Paleocene reptiles of Asia Paleocene crocodylomorphs {{paleo-archosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurycephalosuchus
''Eurycephalosuchus'' is an extinct genus of orientalosuchine alligatoroid from the Late Cretaceous Jiangxi Province of China. Known from a well preserved skull and mandible alongside various postcranial remains, ''Eurycephalosuchus'' possessed a short and broad skull with a very short skulltable. ''Eurycephalosuchus'' lived with at least one other crocodilian, an indetermined member of the clade Brevirostres. The genus is monotypic, containing only the species ''Eurycephalosuchus gannanensis''. History and naming ''Eurycephalosuchus'' was discovered encased in a blox of matrix in the Municipality of Ganzhou City in 2021, located approximately northeast of Ganzhou railway station and northeast of the Nankang District. The sediments the fossils were found in belong to the redbeds, which in this area are a part of the Late Cretaceous Hekou Formation, possibly correlating with the Maastrichtian age. The block contained a nearly complete skull with the attached mandible, 14 ver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orientalosuchus
''Orientalosuchus'' is an extinct genus of alligatoroid crocodilian from the Late Eocene that was found in the Na Duong Formation in Vietnam. The type species ''naduongensis'' was named after the location where it was found in Northeastern Vietnam, near the Chinese border. The Na Duong Formation is dated to the middle to late Eocene (late Bartonian to Priabonian), from 39 to 35 million years ago. Twenty-nine well preserved individual fossils were recovered in the area from 2009 to 2012. The new genus ''Orientalosuchus'' was named in a 2019 study by Massonne ''et al.'' that also included several other extinct alligatoroid taxa from Asia. Phylogenetic analysis found that they were all closely related and together formed a monophyletic clade A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the Engli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globidonta
Globidonta is a clade of alligatoroids that includes alligators, caimans, and closely related extinct forms. It is defined as a stem-based clade including ''Alligator mississippiensis'' (the American Alligator) and all forms more closely related to it than to ''Diplocynodon''. The group's fossil range extends back into the Late Cretaceous with early alligatoroids such as '' Albertochampsa'' and '' Brachychampsa''. Extinct globidontans were particularly common in North America and Eurasia, and their modern range also includes South America. Basal globidontans are characterized by their blunt snouts and bulbous teeth. Modern globidontans have flattened snouts and more conical teeth, and are seen as more generalized than earlier globidontans. Generalized forms are usually expected to be ancestral to more specialized forms rather than descendants of them, so it is unusual for basal members of the group to appear specialized. This seems to conflict with the "Law of the Unspecialized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krabisuchus
''Krabisuchus'' is an extinct genus of alligatoroid crocodylian that existed in what is now Thailand during the Eocene. It was first named by paleontologists Jeremy A. Martin and Komsorn Lauprasert in 2010, and the type species is ''K. siamogallicus''. Fossils have been found from the Krabi Basin of southern Thailand and include mostly cranial and mandibular elements as well as some postcranial remains. ''Krabisuchus'' is currently the most well known primitive alligatoroid from Asia; previously, these animals were only represented in Asia by a few fragmentary remains from China. The fossil record of alligatoroids is much more extensive in Europe and North America, where most taxa have been described. Description Growing to approximately in length, ''Krabisuchus'' was a small alligatoroid that was much smaller than the living alligator. Like the alligator, it had a blunt snout. ''Krabisuchus'' also had a raised skull similar to the extinct alligatorine ''Arambourgia'' and li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protoalligator Huiningensis
''Protoalligator'' is an extinct genus of alligatoroid crocodilian found in the Anhui province of China and lived during the Paleocene. Taxonomy ''P. huiningensis'', was originally named ''Eoalligator huiningensis'', which therefore remains the type species of the genus.Young CC. 1982. A Cenozoic crocodile from Huaining, Anhui. Selected Works of Yang Zhongjian. China: Academia Sinica. 47-48 But then a 2016 study of Chinese alligators by Wang ''et al.'' found the type species '' Eoalligator chunyii'' to be a junior synonym of ''Asiatosuchus nanlingensis'' and a basal member of Crocodylidae. However, a subsequent study by Wu ''et al.'' disagreed with the synonymy of ''"Asiatosuchus" nanlingensis'' and ''Eoalligator chunyii'', finding them to be distinct based on first-hand studies of the holotypes and cladistic analysis, although they agreed in classifying ''E. chunyii'' as a crocodyloid. In 2016, Wang ''et al.'' also found ''Eoalligator huiningensis'' to be an alligatoroid dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachychampsa Sealeyi
''Brachychampsa'' is an extinct genus of alligatoroid, possibly a basal caiman. Specimens have been reported from New Mexico, Colorado, Wyoming, Montana, North and South Dakota, New Jersey, and Saskatchewan, though only those from Montana, Utah, and New Mexico are based on material sufficient to justify the referral. One specimen has been reported from the Darbasa Formation of Kazakhstan, although the species status is indeterminate for the fossil. The genus first appeared during the late Campanian stage of the Late Cretaceous (Judithian North American stage) and became extinct during the late Maastrichtian stage of the Cretaceous (Lancian North American Land Mammal "Age"). ''Brachychampsa'' is distinguished by an enlarged fifth maxillary tooth in the upper jaw. Species The type species of ''Brachychampsa'' is ''B. montana'', first discovered from the Hell Creek Formation of Montana and described by Charles W. Gilmore in a paper in 1911. In that same paper, Gilmore recombine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratosuchus
''Ceratosuchus'' is an extinct genus of alligatorine crocodylian from latest Paleocene rocks of Colorado's Piceance Basin and earliest Eocene rocks of Wyoming's Bighorn Basin in North America, a slice of time known as the Clarkforkian North American Land Mammal Age. Like its modern relatives, ''Ceratosuchus'' was a swamp-dwelling predator. It is named for the pair of flattened, triangular bony plates that extend from the back of its head. The type species is ''C. burdoshi'', a name chosen by the Field Museum after Theodore Burdosh discovered a nearly complete skull on an expedition to Western Colorado in 1937. "Fortunately, a knob of bone projecting from an otherwise undistinguished piece of rock had caught the eye of Mr. Burdosh, and the block had been broughtto the Museum. When the rock was chipped away, the insignificant external lump proved to belong to a fairly complete skull of a fossil crocodilian allied to the alligators; and on one posterior corner it bore a tria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navajosuchus
''Navajosuchus'' is an extinct genus of alligatorine crocodylian. Its fossils have been found in the Paleocene-age Nacimiento Formation of the San Juan Basin, New Mexico (United States). It was named in 1942 by Charles C. Mook, and the original type species was ''N. novomexicanus''. ''N. novomexicanus'' was based on AMNH 5186, a partial skull collected in 1913. Later research showed that ''Navajosuchus novomexicanus'' was the same as the earlier-named ''Allognathosuchus mooki''. However, ''A. mooki'' does not belong to the genus ''Allognathosuchus'', and so the name of the crocodilian becomes ''Navajosuchus mooki''. Under whichever name is used, this animal would have been a generalized predator of the Nacimiento floodplains. It was the most common Nacimiento Formation crocodilian, found in both the Puercan and Torrejonian faunal assemblages. The precise placement of ''Navajosuchus'' within Alligatoroidea is disputed. Some studies have shown it as a basal member of All ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protoalligator
''Protoalligator'' is an extinct genus of alligatoroid crocodilian found in the Anhui province of China and lived during the Paleocene. Taxonomy ''P. huiningensis'', was originally named ''Eoalligator huiningensis'', which therefore remains the type species of the genus.Young CC. 1982. A Cenozoic crocodile from Huaining, Anhui. Selected Works of Yang Zhongjian. China: Academia Sinica. 47-48 But then a 2016 study of Chinese alligators by Wang ''et al.'' found the type species '' Eoalligator chunyii'' to be a junior synonym of '' Asiatosuchus nanlingensis'' and a basal member of Crocodylidae. However, a subsequent study by Wu ''et al.'' disagreed with the synonymy of ''"Asiatosuchus" nanlingensis'' and ''Eoalligator chunyii'', finding them to be distinct based on first-hand studies of the holotypes and cladistic analysis, although they agreed in classifying ''E. chunyii'' as a crocodyloid. In 2016, Wang ''et al.'' also found ''Eoalligator huiningensis'' to be an alligatoroid dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachychampsa Montana
''Brachychampsa'' is an extinct genus of alligatoroid, possibly a basal caiman. Specimens have been reported from New Mexico, Colorado, Wyoming, Montana, North and South Dakota, New Jersey, and Saskatchewan, though only those from Montana, Utah, and New Mexico are based on material sufficient to justify the referral. One specimen has been reported from the Darbasa Formation of Kazakhstan, although the species status is indeterminate for the fossil. The genus first appeared during the late Campanian stage of the Late Cretaceous (Judithian North American stage) and became extinct during the late Maastrichtian stage of the Cretaceous (Lancian North American Land Mammal "Age"). ''Brachychampsa'' is distinguished by an enlarged fifth maxillary tooth in the upper jaw. Species The type species of ''Brachychampsa'' is ''B. montana'', first discovered from the Hell Creek Formation of Montana and described by Charles W. Gilmore in a paper in 1911. In that same paper, Gilmore recombine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jiangxisuchus
''Jiangxisuchus'' is an extinct genus of crocodylian that lived during the Late Cretaceous in what is now China. It was described in 2019, and was proposed to be a basal member of Crocodyloidea. However, another concurrent 2019 study recovered ''Jiangxisuchus'' instead as a basal member of Alligatoroidea, within the newly named clade Orientalosuchina Orientalosuchina is an extinct clade of alligatoroid crocodylians from South and East Asia that lived during the Paleocene and Eocene. The clade was named as the result of a 2019 study by Massonne ''et al.'' that included several extinct alligat .... References {{Taxonbar, from=Q108898418 Crocodilians Prehistoric pseudosuchian genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dongnanosuchus
''Dongnanosuchus'' is an extinct monotypic genus of alligatoroid crocodilian known from the Youganwo Formation of China during the Eocene The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene' .... It contains a single species, ''Dongnanosuchus hsui.'' References Crocodilians Prehistoric pseudosuchian genera Paleocene reptiles of Asia Paleocene crocodylomorphs Fossil taxa described in 2021 {{paleo-archosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
