Eudimorphodon
An unsolved puzzle is the flexibility of the tail, which lacks the very long stiffening vertebral extensions other long-tailed pterosaurs have. This flexibility is a basal trait; its functional significance in this genus is unknown. However, it is known that the stiffened tail of Rhamphorhynchus-like pterosaurs is a device which adds stability to their flight. Without this stability, the animal would be more manoeuvrable, but their flight would need more control by the brain.