Comparison of the mandibles between S. louisianae (left) and S. ayersthey sp. nov. (right). Abbreviations: aba – apodeme attachment location of the abductor muscle, ada – apodeme attachment location of the adductor muscle, bpm – basal process of mandible, dmap – dorsal articular process of mandible, lmap – lateral articular process of mandible, vmap – ventral articular process of mandible. Illustrations adapted from Booher et al. (2021).