Kinosterninae

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Cladus: Archelosauria
Division: Pan-Testudines
Division: Testudinata
Ordo: Testudines
Subordo: Cryptodira

Superfamilia: Chelydroidea
Familia: Kinosternidae
Subfamilia: Kinosterninae
Genera: Kinosternon – Sternotherus – Xenochelys

Name
Kinosterninae Agassiz, 1857

Kinosterninae is a subfamily of the family Kinosternidae, a family of aquatic turtles. Kinosterninae contains the genera Kinosternon and Sternotherus, which are native to much of the United States and northern Mexico.[1]
References

Animal Diversity Web: Family Kinosternidae, by Keith Pecor.