Oklahoma: Alfalfa: 6.5 mi. NE Ingersoll. Comanche: Camp Boulder, Wichita National Forest (Ortenburger and Freeman, 1930:188). McCurtain: Pushmataha: (Ortenburger, 1927:100).
Pennsylvania: Allegheny: Neville Island, Ohio River below Pittsburgh (Atkinson, 1901:154). Clarion: Allegheny River at Foxburg (Netting, 1944:85).
?South Dakota: County unknown: Fort Mackenzie, Missouri River, 6-8 mi. below Cedar Island (Stejneger, 1944:15).
Tennessee: Lake: Mississippi River (Parker, 1948:29). Pickett: Obey River at Eagle Creek Ford (Shoup, Peyton and Gentry, 1941:75).
Wisconsin: Crawford: Pepin: Mississippi River (Breckenridge, 1944:183; Pope and Dickinson, 1928:82).
Trionyx muticus calvatus Webb
Gulf Coast Smooth Softshell
Plate [47]
Trionyx muticus calvatus Webb, Univ. Kansas Publ. Mus. Nat. Hist., 11:519, 1 fig., 2 pls., August 14, 1959.
Type.—Holotype, UI 31071, hatchling, sex undetermined, alcoholic; obtained from Pearl River, Roses Bluff, 14 miles northeast Jackson, Rankin County, Mississippi, by William F. Childers on August 25, 1952.
Range.—Southeastern United States from the Florida Parishes of Louisiana eastward to the western end of the panhandle of Florida; rivers of the Gulf Coast drainage from the Escambia River drainage, Florida, westward to Louisiana and Mississippi including the Pearl River drainage. The eastern extent of geographic range is not known (see map, [Fig. 22]).