 However, recent samples found in Oman suggests that Permian hybodont diversity extended until the end-Permian, suggesting the extinction was more impactful than previously thought.Fossils from the Lower Triassic Vega-Phroso Siltstone Member of the Sulphur Mountain Formation of Alberta, Canada show well preserved specimens of "Wapitiodus aplopagus" which survived the extinction and was abundant in the Early Triassic.Maximum hybodont diversity is observed during the Triassic.