Subfamilia Cyclanorbinae

Lydekker, 1889
Old World flapshell softshell turtles

These turtles have hyo- and hypoplastra fused, the xiphiplastra surrounding the middle prong of the posteromedial process of the hypoplastra, seven or more callosities, and cutaneous femoral flaps on the plastron; the nuchal bone of the carapace has a conspicuous ventral ridge on each side which extends under the 1st costal bone; and the posterior border of the pterygoids has an ascending process which forms a suture with the opisthotic and greatly restricts the postotic fenestra. The three genera of this subfamily are restricted to Africa, India, and Myanmar.