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.
The common snapping turtle is a species of large freshwater turtle in the family Chelydridae. Its natural range extends from southeastern Canada, southwest to the edge of the Rocky Mountains, as far east as Nova Scotia and Florida. The three species of Chelydra and the larger alligator snapping turtles are the only extant chelydrids, a family now restricted to the Americas. The common snapping turtle, as its name implies, is the most widespread.
The brown roofed turtle is a species of turtle in the family Geoemydidae. The species is endemic to South Asia. Two subspecies are recognized.
The Chinese softshell turtle is a species of softshell turtle that is native to China and Taiwan, with records of escapees—some of which have established introduced populations—in a wide range of other Asian countries, as well as Spain, Brazil and Hawaii.
Apalone is a genus of turtles in the family Trionychidae. The three species of Apalone are native to freshwater habitats in North America; they are the only living softshell turtles from the Americas.
The spiny softshell turtle is a species of softshell turtle, one of the largest freshwater turtle species in North America. Both the common name, spiny softshell, and the specific name, spinifera (spine-bearing), refer to the spiny, cone-like projections on the leading edge of the carapace, which are not scutes (scales).
The Texas spiny softshell turtle is a subspecies of the spiny softshell turtle in the family Trionychidae. The subspecies is native to the southwestern United States and adjacent northeastern Mexico.
The Gulf Coast spiny softshell turtle, a subspecies in the Trionychidae family of softshell turtles, is endemic to the south-eastern United States.
The Florida softshell turtle is a species of turtle in the family Trionychidae. The species is native to the Southeastern United States.
The wood turtle is a species of turtle endemic to North America. It is in the genus Glyptemys, a genus which contains only one other species of turtle: the bog turtle. The wood turtle reaches a straight carapace length of 14 to 20 centimeters, its defining characteristic being the pyramidal shape of the scutes on its upper shell. Morphologically, it is similar to the bog turtle, spotted turtle, and Blanding's turtle. The wood turtle exists in a broad geographic range extending from Nova Scotia in the north to Minnesota in the west and Virginia in the south. In the past, it was forced south by encroaching glaciers: skeletal remains have been found as far south as Georgia.
The river cooter is a species of freshwater turtle in the family Emydidae. The species is native to the central and eastern United States, but has been introduced into parts of California, Washington, and British Columbia.
Norman Edouard "Kibe" Hartweg was an American herpetologist, Curator of Herpetology for the Museum of Zoology at the University of Michigan, and president of the American Society of Ichthyologists and Herpetologists. He was a specialist in the taxonomy and distribution of turtles, and is honored by having a subspecies of turtle named after him: the western spiny softshell turtle, Apalone spinifera hartwegi. He is also credited with having described several new species, including the Big Bend slider, Trachemys gaigeae, the Oaxacan patchnose snake, Salvadora intermedia, and Dunn's hognose pit viper, Porthidium dunni.
The Caspian turtle, also known as the striped-neck terrapin, is a species of turtle in the family Geoemydidae (=Bataguridae). It is found in the eastern Mediterranean region from southwestern former USSR and central Iran to Saudi Arabia, Bahrain, Israel, and Lebanon, northward through Turkey to Bulgaria, and through Cyprus, Crete, and the Ionian Peninsula to former Yugoslavia.
The Cuatro Ciénegas softshell, also called the black spiny softshell, is a subspecies of the spiny softshell turtle in the family Trionychidae. It is found only in the Cuatro Ciénegas Basin in the Mexican state of Coahuila and it is considered critically endangered by the IUCN. The subspecies, along with its parent species, was formerly classified in the genus Trionyx.
The Cumberland slider, also called commonly the Cumberland turtle and Troost's turtle, is a subspecies of pond slider, a semiaquatic turtle in the family Emydidae. The subspecies is indigenous to the Southeastern United States.
The black-knobbed map turtle, formerly known as the black-knobbed sawback, is a small to medium-sized aquatic turtle with light gray skin. Some of the most distinguishing characteristics of the black-knobbed map turtle, and the Graptemys genus, are the protruding "spikes" on the turtle's carapace. This species inhabits mainly the fall lines of rivers in the Mobile Bay drainage, in Alabama and Mississippi.
The northern map turtle, also known as the common map turtle, is an aquatic turtle in the family Emydidae. It is endemic to North America.
The eastern mud turtle or common mud turtle is a common species of turtle in the family Kinosternidae. The species is endemic to the United States. There are two recognized subspecies.
The Ouachita map turtle is a species of turtle belonging to the family Emydidae.
