On Paleopathology of the Upper Cretaceous Plesiosauroid Sauropterygians of the Lower Volga-Region On Paleopathology of the Upper Cretaceous Plesiosauroid Sauropterygians of the Lower Volga-Region Authors: Stepanov S. A., Arkhangelsky M. S., Ivanov A. V., Grigoriev M. A. Plesiosauroid sauropterygian remains with mechanical traumas (predator’s bites) and paleopathological modifications in bone structure were described from the Upper Cretaceous deposits of the Lower Volga region.