The Colorado Herpetological Society

Reptile and Amphibian Keys

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INDEX OF SPECIES
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Last Updated on January 13, 2000

1a.	Shell flat and leathery, with row of raised tubercles.	Apalone spinifera, Spiny softshell
1b.	Shell not as above.	(2)

2a.	Conspicuous yellow lines radiating on upper shell, primarily terrestrial.	Terrapene ornata, Ornate box turtle
2b.	Not as above.	(3)

3a.	Upper shell mostly greenish, ventral surface orange or red, head with yellow streaks.	Chrysemys picta, Painted turtle
3b.	Not as above.	(4)

4a.	Lower shell lacking hinge; upper shell mostly brownish with saw-toothed rear margin.	Chelydra serpentina, Snapping turtle
4b.	Lower shell with hinge; upper shell lacking saw-toothed rear margin.	Kinosternon flavescens, Yellow mud turtle