Spiny Softshell Turtle. The Spiny Softshell (Apalone Spinifera, Formerly Trionyx Spiniferus) Is A Species Of Softshelled Turtle, One Of The Largest Freshwater Turtle Species In North America. They Get Their Name From The Spiny, Cone-Like Projections On The Leading Edge Of Their Carapace, Which Are Not Scutes (Scales).

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