†suborder Polycryptodira Gaffney and Meylan 1988 (turtle)
Parent taxon: Eucryptodira according to D. B. Brinkman and J.-H. Peng 1993
Sister taxa: Angolachelonia, Borealochelys, Caretta, Centrocryptodira, Chelycarapookus, Eurysternidae, Hoyasemys, Liaochelys, Salasemys, Sandownidae, Sinemydidae, Wuguia
Subtaxa: none
Ecology: