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Trionychinae
The Trionychinae are a subfamily of turtles in the family Trionychidae. Classification The subfamily has 11 extant genera: *''Amyda'' *'' Apalone'' *'' Axestemys'' *'' Chitra'' *'' Dogania'' *'' Drazinderetes'' *'' Gobiapalone'' *'' Khunnuchelys'' *'' Murgonemys'' *'' Nilssonia'' *'' Oliveremys'' *'' Palea'' *'' Palaeoamyda'' *''Pelochelys'' *'' Pelodiscus'' *'' Rafetoides'' ( nomen dubium) *'' Rafetus'' *''Trionyx ''Trionyx'' is a genus of softshell turtles belonging to the family Trionychidae. In the past many species in the family were classified in this genus, but today '' T. triunguis'', the African or Nile softshell turtle, is the only extant softshe ...'' References {{Taxonbar, from=Q2036081 Tetrapod subfamilies Taxa named by John Edward Gray ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drazinderetes
''Drazinderetes'' is a large bodied genus of soft shell turtle from the Middle Eocene Drazinda Formation of Pakistan. Its presence in the shallow marine deposits of the Drazinda Formation suggests that ''Drazinderetes'' may have been a partially or fully marine animal. Indetermined trionychine remains from the same formation may suggest that ''Drazinderetes'' could have been among the largest known turtles, with one entoplastron indicating a potential length of 1.5 to 2.1 meters. ''Drazinderetes'' currently consists of only a single species: ''Drazinderetes tethyensis''. Discovery and naming The first surveys of the Drazinda Formation were conducted in 1993 and 1996 by the Geological Survey of Pakistan and the University of Michigan. The holotype (GSP-UM 3 195) of ''Drazinderetes'', a nearly complete carapace, was found during the 1996 exploration of the area west of Satta Post in sediments of Bartonian age (39 - 38 Ma) that also yielded archaeocetes and primitive sea cows. ... [...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'' *'' Dogania'' *'' Drazinderetes'' *'' Gobiapalone'' *'' Khunnuchelys'' *'' Murgonemys'' *'' Nilssonia'' *'' Oliveremys'' *'' Palea'' *'' Palaeoamyda'' *''Pelochelys'' *'' Pelodiscus'' *'' Rafetoides'' ( nomen dubium) *'' Rafetus'' *''Trionyx ''Trionyx'' is a genus of softshell turtles belonging to the family Trionychidae. In the past many species in the family were classified in this genus, but today '' T. triunguis'', the African or Nile softshell turtle, is the only extant softshe ...'' References {{Taxonbar, from=Q2036081 Tetrapod subfamilies Taxa named by John Edward Gray ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trionychidae
The Trionychidae are a taxonomic family of a number of turtle genera, commonly known as softshell turtles. The family was erected by Leopold Fitzinger in 1826. Softshells include some of the world's largest freshwater turtles, though many can adapt to living in highly brackish areas. 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 They are called "softshell" because their carapaces lack horny scutes (scales), though the spiny softshell, '' Apalone spinifera'', does have some scale-like projections, hence its name. The carapace is leathery and pliable, particularly at the sides. The central part of the carapace has a layer of solid bone beneath it, as in other turtles, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeoamyda
''Palaeoamyda'' is an extinct genus of softshell turtle belonging to the family Trionychidae. Remains have been found in the Eocene The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ... of Germany. Taxonomy Karl (1998) considered ''Palaeoamyda'' a synonym of '' Rafetoides austriacus'' (Peters, 1858), but subsequent re-description of the material showed that it was a distinct genus in its own right.Cadena E. (2016) Palaeoamyda messeliana nov. comb. (Testudines, Pan-Trionychidae) from the Eocene Messel Pit and Geiseltal localities, Germany, taxonomic and phylogenetic insights. PeerJ 4:e2647 https://doi.org/10.7717/peerj.2647 Description ''Palaeoamyda'' is a three-clawed soft-shell turtle that can reach a length of about two feet. It is the largest species of turtles of Messel Pit Fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apalone
''Apalone'' is a genus of turtles in the family Trionychidae. Species of ''Apalone'' are native to North America. Geographic range Most ''Apalone'' species are restricted to the United States, though the range of the spiny softshell, ''A. spinifera'', extends into southern Canada and northern Mexico. Taxonomy ''Apalone'' is a fairly new classification, resurrected by Meylan in 1987, assigned to North American species of the genus ''Trionyx''. They are still listed as ''Trionyx'' in some texts. (''Trionyx'' now refers specifically to certain softshell species found mainly in Africa.) Sexual dimorphism Turtles of the genus ''Apalone'' exhibit marked sexual dimorphism. In carapace length, females grow to about twice the size of males. In males, the claws on the front feet are longer than those on the back feet, but in females, the claws on the back feet are longer. In males, the stout tail extends well beyond the posterior edge of the carapace, but in females, the relatively thinn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rafetus
''Rafetus'' is a genus of highly endangered softshell turtles in the family Trionychidae. It is a genus of large turtles which are found in freshwater habitats in Asia. Species According to most taxonomists, the genus ''Rafetus'' contains the following two species. *''Rafetus euphraticus'' – Euphrates softshell turtle *''Rafetus swinhoei'' – Yangtze giant softshell turtle A third species, ''Rafetus leloii'' ( synonym ''R. vietnamensis'' ), known commonly as the Hoan Kiem turtle, has been proposed as a species. It is considered a junior synonym of ''Rafetus swinhoei'' by most authorities, but some Vietnamese scientists insist the two forms are not identical. The last known individual at Hoan Kiem Lake was found dead on 19 January 2016. Taxonomy Cladogram As drawn by Walter G. Joyce, Ariel Revan, Tyler R. Lyson, and Igor G. Danilov (2009) Distribution * '' Rafetus euphraticus'': had been found at Tigris and Euphrates Rivers in Iraq, Syria, Turkey, and Khūzestān ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khunnuchelys
''Khunnuchelys'' was a genus of trionychine turtle from the Late Cretaceous of Asia. Three species are known, ''K. erinhotensis'', the type species, ''K. kizylkumensis'', and ''K. lophorhothon''. ''K. erinhotensis'' is known from the Iren Dabasu Formation in China from the late Turonian until the middle Campanian. ''K. kizylkumensis'' is known from the late Turonian Bissekty Formation of Uzbekistan. The third species, described in 2013 by Danilov ''et al.'', is known from the early to middle Campanian aged Bostobe Formation of Kazakhstan. History of naming ''K. lophorothon'' is known from two skulls, and has a complex history of classifications. Originally, it was assigned to the dinosaur genus cf. ''Lophorhothon'' by Lev Alexandrovitch Nessov in 1995 as an unidentified species. Later, it was correctly transferred to the genus ''Khunnuchelys'' by Danilov and Vitek (2012), but was not described in any detail. The two skulls were named ''Khunnuchelys'' sp. 1 and ''Khunnuchelys'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Australia an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palea (turtle)
The wattle-necked softshell turtle (''Palea steindachneri''), also commonly known as Steindachner's soft-shelled turtle, is an endangered Asian species of softshell turtle in the family Trionychidae. The species is the only member of the genus ''Palea''. Description ''P. steindachneri'' exhibits sexual dimorphism. Females of this freshwater turtle reach up to in straight carapace length, while males only reach up to . However, males have a longer tail than the females. Etymology The specific name, ''steindachneri'', is in honor of Austrian herpetologist Franz Steindachner.Beolens, Bo; Watkins, Michael; Grayson, Michael (2011) ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (''Palea steindachneri'', p. 252). Geographic range ''P. steindachneri'' is native to southeastern China (Guangdong, Guangxi, Guizhou, Hainan, Yunnan), Laos, and Vietnam, but has also been introduced to Hawaii and Mauritius. Threats ''P. steindach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trionyx
''Trionyx'' is a genus of softshell turtles belonging to the family Trionychidae. In the past many species in the family were classified in this genus, but today '' T. triunguis'', the African or Nile softshell turtle, is the only extant softshell still classified as ''Trionyx''. The other species still assigned to this genus are only known from fossils. ''T. triunguis'' is a relatively large, aquatic piscivore. Species The list of species follows a 2017 review of the Trionychidae by Georgios L. Georgalis and Walter G. Joyce. * '' Trionyx triunguis'' ( Forsskål, 1775) – African or Nile softshell turtle * † '' Trionyx pliocenicus'' Fucini, 1912 – Pliocene of Tuscany (Italy) * † '' Trionyx vindobonensis'' (Peters, 1855) – Miocene of Vienna (Austria) The following species are considered valid trionychid taxa, but with uncertain phylogenetic relationships. They are only referred to ''Trionyx'' provisionally due to its historic status as a wastebasket taxon Waste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nomen Dubium
In binomial nomenclature, a ''nomen dubium'' (Latin for "doubtful name", plural ''nomina dubia'') is a scientific name that is of unknown or doubtful application. Zoology In case of a ''nomen dubium'' it may be impossible to determine whether a specimen belongs to that group or not. This may happen if the original type series (i. e. holotype, isotype, syntype or paratype) is lost or destroyed. The zoological and botanical codes allow for a new type specimen, or neotype, to be chosen in this case. A name may also be considered a ''nomen dubium'' if its name-bearing type is fragmentary or lacking important diagnostic features (this is often the case for species known only as fossils). To preserve stability of names, the ''International Code of Zoological Nomenclature'' allows a new type specimen, or neotype, to be chosen for a ''nomen dubium'' in this case. 75.5. Replacement of unidentifiable name-bearing type by a neotype. When an author considers that the taxonomic identity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
