Key: Step 381. Family Kinosternidae
Family Kinosternidae

381a. Reduced, cross-shaped plastron, having seven or eight scutes; entoplastron present.






Subfamily Staurotypinae

Step 382

381b. Well-developed, large plastron, having 10 or 11 scutes; entoplastron absent.






Subfamily Kinosterninae

Step 384
Decision path