3c. Carapace with white tubercles; ocelli (eyelike spots) on carapace
usually absent unless surrounding white tubercles ...........3e and 3f
3d. White tubercles absent; dark spots and ocelli on carapace usually
present. Occurs in Canadian drainage system (see map).................
Western Spiny Softshell Turtle (Apalone spinifera hartwegi).
3e. White tubercles more prevalent on the posterior part of the carapace;
ocelli and black spots on carapace absent. (see map for occurance)
Pallid Spiny Softshell Turtle (Apalone spinifera pallida).
3f. Large tubercles more prevalent on the anterior part of the carapace;
ocelli and black dots on carapace often present. Occurs in Nueces,
Guadalupe, and Colorado drainage systems (see map)....................
Guadalupe Spiny Softshell Turtle (Apalone spinifera guadalupensis)