sentences:  (2012) showed that its distinct from "Machimosaurus" that possess external mandibular fenestrae and an anterior transverse expansion of the mandibular symphysis, whereas NHMUK PV R1089 lacks both features.Furthermore, both species of "Machimosaurus" lack the prearticular, which is present in NHMUK PV R1089.Additionally, NHMUK PV R1089 exhibits extreme reduction in dentition (13 dentary alveoli compared to 19–25 in "Machimosaurus") that is otherwise observed in geosaurine metriorhynchids.