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
                                                                    
                    
                38 possible taxa remaining show common names
- Claudius angustatus
 - Kinosternon acutum
 - Kinosternon alamosae
 - Kinosternon angustipons
 - Kinosternon baurii
 - Kinosternon chimalhuaca
 - Kinosternon creaseri
 - Kinosternon dunni
 - Kinosternon flavescens arizonense
 - Kinosternon flavescens durangoense
 - Kinosternon flavescens flavescens
 - Kinosternon herrerai
 - Kinosternon hirtipes chapalaense
 - Kinosternon hirtipes hirtipes
 - Kinosternon hirtipes magdalense
 - Kinosternon hirtipes megacephalum
 - Kinosternon hirtipes murrayi
 - Kinosternon hirtipes tarascense
 - Kinosternon integrum
 - Kinosternon leucostomum leucostomum
 - Kinosternon leucostomum postinguinale
 - Kinosternon oaxacae
 - Kinosternon scorpioides abaxillare
 - Kinosternon scorpioides albogulare
 - Kinosternon scorpioides cruentatum
 - Kinosternon scorpioides scorpioides
 - Kinosternon sonoriense longifemorale
 - Kinosternon sonoriense sonoriense
 - Kinosternon subrubrum hippocrepis
 - Kinosternon subrubrum steindachneri
 - Kinosternon subrubrum subrubrum
 - Staurotypus salvinii
 - Staurotypus triporcatus
 - Sternotherus carinatus
 - Sternotherus depressus
 - Sternotherus minor minor
 - Sternotherus minor peltifer
 - Sternotherus odoratus
 
Decision path