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Chelydridae
The Chelydridae is a family of turtles that has seven extinct and two extant genera. The extant genera are the snapping turtles, ''Chelydra'' and '' Macrochelys''. Both are endemic to the Western Hemisphere. The extinct genera are '' Acherontemys'', '' Chelydrops'', '' Chelydropsis'', ''Emarginachelys'', '' Macrocephalochelys'', '' Planiplastron'', and '' Protochelydra''. Fossil history The Chelydridae have a long fossil history, with extinct species reported from North America as well as all over Asia and Europe, far outside their present range. The earliest described chelydrid is '' Emarginachelys cretacea'', known from well-preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana. Another well-preserved fossil chelydrid is the Late Paleocene ''Protochelydra zangerli'' from North Dakota. The carapace of ''P. zangerli'' is higher-domed than that of the recent ''Chelydra'', a trait conjectured to be associated with the coexistence of large, turtle-eating c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macrochelys
''Macrochelys'' is a genus of very large freshwater turtles in the family Chelydridae from Southeastern United States. Only a single extant species was recognized until a 2014 study divided it into two, or possibly three species. Extant species Traditionally, only a single extant species was recognized, but following reviews, two species are now recognized:Reptile DatabaseMacrochelys.Retrieved 26 September 2017.Turtle Taxonomy Working Group hodin, A.G.J., Iverson, J.B., Bour, R. Fritz, U., Georges, A., Shaffer, H.B., and van Dijk, P.P.(2017). "Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (8th Ed.)." In: Rhodin, A.G.J., Iverson, J.B., van Dijk, P.P., Saumure, R.A., Buhlmann, K.A., Pritchard, P.C.H., and Mittermeier, R.A. (Eds.). "Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group." ''Chelonian Research Monographs'' 7:1â ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macrocephalochelys
''Macrocephalochelys'' is an extinct genus of turtles in the family Chelydridae. It was first described from a partial skull from the Pliocene found in Ukraine by Piboplichko and Taraschchuk in 1960. It was assigned to the family Chelydridae The Chelydridae is a family of turtles that has seven extinct and two extant genera. The extant genera are the snapping turtles, ''Chelydra'' and '' Macrochelys''. Both are endemic to the Western Hemisphere. The extinct genera are '' Acherontemy ... by R. L. Carroll in 1988 although it had been hypothesised to belong in Chelydridae by Chkhikvadze in 1971. References Chelydridae Pliocene turtles Pliocene reptiles of Europe Prehistoric turtle genera Fossil taxa described in 1960 Extinct turtles {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelydrops
''Chelydrops'' is an extinct genus of Chelydridae from Miocene of North America. Only one species is described, ''Chelydrops stricta'' (Matthew, 1924). The genus was considered by Hutchison (2008) to be a junior synonym of the genus '' Macrochelys'', containing the alligator snapping turtle The alligator snapping turtle (''Macrochelys temminckii'') is a large species of turtle in the family Chelydridae. The species is native to freshwater habitats in the United States. ''M. temminckii'' is one of the heaviest freshwater turtles in ...; Hutchison transferred the species ''C. stricta'' to the genus ''Macrochelys''. References * Carroll, R. L. Vertebrate Paleontology and Evolution. W. H Freeman Company, 1988. Chelydridae Miocene turtles Miocene reptiles of North America Prehistoric turtle genera Taxa named by Wilhelm Peters Fossil taxa described in 1868 {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protochelydra Zangerli
''Protochelydra zangerli'' is an extinct species of chelydid in the extinct genus ''Protochelydra'' of Chelydridae The Chelydridae is a family of turtles that has seven extinct and two extant genera. The extant genera are the snapping turtles, ''Chelydra'' and '' Macrochelys''. Both are endemic to the Western Hemisphere. The extinct genera are '' Acherontemy .... References Chelydridae Extinct reptiles Paleogene reptiles of North America Eocene turtles Prehistoric turtle genera Fossil taxa described in 1973 Extinct turtles {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protochelydra
''Protochelydra zangerli'' is an extinct species of chelydid in the extinct genus ''Protochelydra'' of Chelydridae The Chelydridae is a family of turtles that has seven extinct and two extant genera. The extant genera are the snapping turtles, ''Chelydra'' and '' Macrochelys''. Both are endemic to the Western Hemisphere. The extinct genera are '' Acherontemy .... References Chelydridae Extinct reptiles Paleogene reptiles of North America Eocene turtles Prehistoric turtle genera Fossil taxa described in 1973 Extinct turtles {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planiplastron
''Planiplastron'' is an extinct genus of snapping turtle. It was first described by Chkhikvadze in 1971. It was assigned to the family Chelydridae The Chelydridae is a family of turtles that has seven extinct and two extant genera. The extant genera are the snapping turtles, ''Chelydra'' and '' Macrochelys''. Both are endemic to the Western Hemisphere. The extinct genera are '' Acherontemy ... by R. L. Carroll in 1988. References Extinct reptiles Chelydridae Oligocene turtles Prehistoric turtle genera Fossil taxa described in 1971 Extinct turtles {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emarginachelys
''Emarginachelys cretacea'' is a turtle belonging to the group Cryptodira, known from well preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columb .... Its exact phylogenetic position within Cryptodira is uncertain; different authors considered it to be either the earliest described chelydrid or a fossil relative of kinosternoids. References Cryptodira Prehistoric turtle genera Late Cretaceous turtles of North America Hell Creek fauna Fossil taxa described in 1978 {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emarginachelys Cretacea
''Emarginachelys cretacea'' is a turtle belonging to the group Cryptodira, known from well preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi .... Its exact phylogenetic position within Cryptodira is uncertain; different authors considered it to be either the earliest described chelydrid or a fossil relative of kinosternoids. References Cryptodira Prehistoric turtle genera Late Cretaceous turtles of North America Hell Creek fauna Fossil taxa described in 1978 {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelydropsis
''Chelydropsis'' is an extinct genus in the family of snapping turtle that lived from the Oligocene to the Pliocene in Asia and Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia .... Species * ''Chelydropsis aubasi'' * '' Chelydropsis apellanizi'' * '' Chelydropsis decheni'' * '' Chelydropsis kusnetzovi'' * '' Chelydropsis manuascensis'' * ''Chelydropsis murchisoni'' * '' Chelydropsis sansaniensis'' References * Romer, Alfred Sherwood (Jan. 1 1997). ''The Osteology of the Reptiles.'' Reprint edition. Krieger Pub. Co. pp. 800. {{Chelydridae Chelydridae Oligocene turtles Miocene turtles Pliocene turtles Oligocene reptiles of Asia Oligocene reptiles of Europe Miocene reptiles of Asia Miocene reptiles of Europe Pliocene reptiles of Asia Pliocene reptiles of Eu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acherontemys
''Acherontemys'' is an extinct genus of turtle from Miocene of United States. Taxonomy It was assigned to Chelydridae by Robert L. Carroll in 1988, while Hutchison classified it within Emydidae Emydidae (Latin ''emys'' (freshwater tortoise) + Ancient Greek εἶδος (''eîdos'', “appearance, resemblance”)) is a family of testudines (turtles) that includes close to 50 species in 10 genera. Members of this family are commonly calle ... in 1992. In 2016, it was placed in Panemydidae by Joyce and Borque. References Chelydridae Extinct animals of the United States Miocene turtles Prehistoric turtle genera Fossil taxa described in 1899 {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelydra
''Chelydra'' is one of the two extant taxon, extant genus, genera of the snapping turtle family, Chelydridae, the other being ''Macrochelys'', the much larger alligator snapping turtle. The snapping turtles are native to the Americas, with ''Chelydra'' having three species, one in North America and two in Central America, one of which is also found in northwestern South America. Species The genus ''Chelydra'' has the following species: * ''Chelydra acutirostris'' (Wilhelm Peters, W. Peters, 1862) – South American snapping turtle * ''Chelydra rossignonii'' (Marie Firmin Bocourt, Bocourt, 1868) – Central American snapping turtle * ''Chelydra serpentina'' (Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758) – common snapping turtle (North America) * ''Chelydra floridana''†* ''Chelydra laticarinata''†* ''Chelydra sculpta''†The three extant ''Chelydra'' species were once all considered to be several subspecies of ''Chelydra serpentina'', along with a fourth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turtle
Turtles are an order of reptiles known as Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked turtles), which differ in the way the head retracts. There are 360 living and recently extinct species of turtles, including land-dwelling tortoises and freshwater terrapins. They are found on most continents, some islands and, in the case of sea turtles, much of the ocean. Like other amniotes (reptiles, birds, and mammals) they breathe air and do not lay eggs underwater, although many species live in or around water. Turtle shells are made mostly of bone; the upper part is the domed carapace, while the underside is the flatter plastron or belly-plate. Its outer surface is covered in scales made of keratin, the material of hair, horns, and claws. The carapace bones develop from ribs that grow sideways and develop into broad flat plates th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
