Fig. 22

Sphenodontian evolutionary change rates averaged over geochronologic age, including Parvosaurus harudensis. Orange, time-calibration using the ‘mbl’ model; blue, time- calibration using the ‘equal’ model. Although Permian and early Triassic rates generally show lower accuracy, Middle and Late Triassic sphenodontians yield overall higher rates than younger Jurassic and Cretaceous sphenodontians in both models. Gray and white background stripes indicate geochronologic ages