Molecular Biology and Genetics
Statistics of barcoding coverage
Specimens with Sequences:53
Specimens with Barcodes:10
Species With Barcodes:2
Apalone is a fairly new classification, resurrected by Meylan in 1987, assigned to North American species of the genus Trionyx, though they are still listed as Trionyx in some texts. (Trionyx now refers specifically to certain softshell species found mainly in Africa.)
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 thinner tail barely reaches the edge of the carapace.
- Florida softshell turtle (Apalone ferox) - South Carolina, Georgia, Florida, and Alabama.
- Smooth softshell turtle (Apalone mutica) - United States, east of the Rocky Mountains.
- Spiny softshell turtle (Apalone spinifera) - Canada (southern Ontario and Quebec), most of the United States, and northeastern Mexico.
- Fritz, Uwe and Havaš, Peter. 2007. Checklist of Chelonians of the World. Museum für Tierkunde Dresden. Dresden.
- Meylan, P.A. 1987. The phylogenetic relationships of soft-shelled turtles (family Trionychidae). Bull. Am. Mus. Nat. Hist. 186:1-101.
- Smith, H.M. and E.D. Brodie, Jr. 1982. Reptiles of North America: A Guide to Field Identification. Golden Press. New York. 240 pp. (SOFTSHELL TURTLES—family Trionychidae, p. 30.)
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