North American Recent Soft-Shelled Turtles (Family Trionychidae)

by Robert G. Webb

1943. Amphibians and reptiles of South Dakota. Nat. Hist. Stud., Univ. So. Dakota, 6:1-31, 20 figs., July.

Parker, M. V.

1937. Some amphibians and reptiles from Reelfoot Lake. Jour. Tennessee Acad. Sci., 12(1):60-86, 18 figs., January.

1939. The amphibians and reptiles of Reelfoot Lake and vicinity, with a key for the separation of species and subspecies. Jour. Tennessee Acad. Sci., 14(1):72-101, 14 figs., January.

1948. A contribution to the herpetology of western Tennessee. Jour. Tennessee Acad. Sci., 23(1):20-30, January.

Parsons, T. S.

1958. The choanal papillae of the Cheloniidae. Breviora, 85:1-5, 2 pls., January 31.

1960. The structure of the choanae of the Emydinae (Testudines, Testudinidae). Bull. Mus. Comp. Zool., 123(4):113-127, 4 figs., September.

Penn, G. H.