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 revealed the clade to be split into two living groups: Testuguria, comprising Geoemydidae and Testudinidae; and Emysternia, consisting of Emydidae and Platysternidae.