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This is a list of species of fauna that have been observed in the U.S. state of Oklahoma.
Oklahoma is a state in the South Central region of the United States, bordered by Kansas on the north, Missouri on the northeast, Arkansas on the east, Texas on the south, New Mexico on the west, and Colorado on the northwest. It is the 20th-most extensive and the 28th-most populous of the fifty United States. The state's name is derived from the Choctaw words okla and humma, meaning "red people". It is also known informally by its nickname, "The Sooner State", in reference to the non-Native settlers who staked their claims on land before the official opening date of lands in the western Oklahoma Territory or before the Indian Appropriations Act of 1889, which dramatically increased European-American settlement in the eastern Indian Territory. Oklahoma Territory and Indian Territory were merged into the State of Oklahoma when it became the 46th state to enter the union on November 16, 1907. Its residents are known as Oklahomans, and its capital and largest city is Oklahoma City.
Cambarellus puer is a species of crayfish in the family Cambaridae. It is known commonly as the swamp dwarf crayfish. It is native to the United States, where it can be found in Oklahoma, Texas, Louisiana, Illinois, Arkansas, Mississippi, Tennessee, and Kentucky.
The three-toed amphiuma, Amphiuma tridactylum, is a species of aquatic salamander native to the Southeastern United States.
The North American green toad, Anaxyrus debilis, also known by its old name Bufo debilis, is a species of toad found in the southwestern United States in the states of Arizona, New Mexico, Colorado, Kansas, and Texas, as well as in northern Mexico in the states of Tamaulipas, San Luis Potosí, Durango, and Zacatecas. It is commonly called green toad.
Astacus pachypus, the Caspian crayfish is a extinct species of crayfish found in the Caspian Sea, the Don river, and parts of the Black Sea and Sea of Azov, where it lives in salinities of up to 14‰. It is listed as Extinct in the IUCN Red List.
Pacifastacus is a genus of crayfish native to western North America, containing the following six species :
Engaeus is a genus of freshwater crayfish found in Australia, the burrowing crayfishes. Fifteen of the 35 species in the genus occur in Tasmania, where they are known as the Tasmanian land crayfishes. The behaviour of these crayfish is notable as they live in burrows and construct large "chimneys" at the opening.
Orconectes is a genus of freshwater crayfish, native to the eastern United States and Canada. It includes the rusty crayfish, an invasive species in North America, and Orconectes limosus, an invasive species in Europe.
Astacoides betsileoensis is a species of crayfish in the family Parastacidae. It is endemic to Madagascar. The populations are threatened by habitat loss due to land conversion as well as harvesting for food from locals and predation from introduced species. As of 2010 there were no specific measures for conservation apart from a minimum size limit of 10 cm for harvesting. In some areas, local rules and taboos help controlling the pressure from harvesting.
Austropotamobius is a genus of crayfish in the family Astacidae. It contains three extant species, and one species known from fossils of Barremian age:
Distocambarus is a genus of freshwater crayfish endemic to Georgia and South Carolina in the United States. It contains five species:
Hobbseus is a genus of crayfish in the family Cambaridae. It comprises seven species, six of which are endemic to Mississippi; H. prominens is the only species to range outside Mississippi, being also found in Alabama. Three of the seven species are listed as endangered (EN) on the IUCN Red List, while three are of uncertain status (DD) and one is of least concern (LC).
Orconectes saxatilis is a species of crayfish in the family Cambaridae. It is endemic to tributaries of the Kiamichi River, Le Flore County, Oklahoma. Its common name is Kiamichi crayfish.
Procambarus brazoriensis, the Brazoria crayfish, is a species of crayfish which is endemic to Brazoria County, Texas. It is listed as an endangered species on the IUCN Red List.
Procambarus connus, the Carrollton crayfish, is a species of crayfish in the family Cambaridae. It is endemic to the area around Carrollton, in Carroll County, Mississippi. It is listed as Data Deficient on the IUCN Red List.
Procambarus morrisi is a species of crayfish in the family Cambaridae. It is only known from the type locality, at the Devil's Sink, west of Interlachen, Putnam County, Florida, and is listed as critically endangered on the IUCN Red List.
Procambarus nigrocinctus, the blackbelted crayfish, is a species of crayfish in the family Cambaridae. It is listed as a species of Least Concern on the IUCN Red List, because it is known from more than 100 sites across thirteen counties, all in the Neches River system, and is common and widespread in a national park.
Procambarus pogum, the bearded crayfish or bearded red crayfish, is a species of crayfish in the family Cambaridae. It is endemic to the Houlka–Tibbie Creek basin in Chickasaw County and Oktibbeha County, Mississippi, and is listed as Data Deficient on the IUCN Red List, having only been recorded once since its original description.
Procambarus texanus is a species of crayfish in the family Cambaridae. It is only known from a fish hatchery near Smithville, Bastrop County, Texas. and is listed as Data Deficient on the IUCN Red List.
Orconectes limosus is a species of crayfish in the family Cambaridae. It is native to the east coast of North America, from Maine to the lower James River, Virginia, but has also been introduced to Europe. It is known commonly as the spinycheek crayfish.
Procambarus zonangulus, the white river crawfish, white river crayfish or southern white river crayfish, is a species of freshwater crayfish.
Orconectes immunis is a species of crayfish in the family Cambaridae. It is native to North America and it is an introduced species in Europe, where it lives along the Upper Rhine. Its common names include calico crayfish and papershell crayfish.