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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 (other American softshell turtles are only known from fossil remains).
The spiny softshell turtle (Apalone spinifera) 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).
It is the largest species of softshell turtle found in Florida and all of North America, ranging from 15 to 76 cm (5.9 to 29.9 in) in straight-line carapace length. [13] The Florida softshell turtle also exhibits significant sexual size dimorphism. Adult females are often 3-5 times larger than males.
Trionychidae is a family of turtles, commonly known as softshell turtles or simply softshells.The family was described by Leopold Fitzinger in 1826. Softshells include some of the world's largest freshwater turtles, though many can adapt to living in highly brackish waters.
The Cuatro Ciénegas softshell (Apalone spinifera atra), 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. [1]
The northern spiny softshell turtle (Apalone spinifera spinifera) is a subspecies of soft-shelled turtle in the family Trionychidae.The subspecies is native to the United States and can be found from Montana at the western edge of its range to Vermont and Quebec on the eastern edge.
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Apalone spinifera asper – Stubbs, 1989 Apalone spinifera aspera – Iverson, Meylan, Pritchard, Seidel & Ward, 1990 The Gulf Coast spiny softshell turtle ( Apalone spinifera aspera ), a subspecies in the Trionychidae family of softshell turtles , is endemic to the south-eastern United States.