A 2021 study found the clade to be divided into two extant groups: Testuguria, containing Geoemydidae and Testudinidae; and Emysternia, containing Emydidae and Platysternidae.
A 2021 study categorized the clade into two existing branches: Testuguria, encompassing Geoemydidae and Testudinidae; and Emysternia, containing Emydidae and Platysternidae.