†suborder Polycryptodira Gaffney and Meylan 1988 (turtle)
Parent taxon: Eucryptodira according to J. H. Hutchison and P. A. Holroyd 2003
See also Brinkman and Peng 1993, Hirayama and Hikida 1998 and Karl and Tichy 2007
Sister taxa: Angolachelonia, Borealochelys, Centrocryptodira, Enaliochelys, Hoyasemys, Sandownidae, Sinemydidae, Sinochelyidae, Tienfucheloides, Xinjiangchelyidae
Subtaxa: none
Ecology: aquatic omnivore
Distribution: there are no occurrences of Polycryptodira in the database