is a specific kind of: reptile family.

has as a member: tortoise | genus Testudo, Testudo | genus Geochelone, Geochelone | genus Gopherus, Gopherus | genus Xerobates, Xerobates.

is a member of: Chelonia, order Chelonia, order Testudinata, order Testudines, Testudinata, Testudines.