 Aigialosauridae

Aigialosauridae (from Greek, "aigialos" = "seashore" and "sauros"= lizard) is a family of Late Cretaceous semiaquatic varanoid lizards closely related to the mosasaurs.Regarded by some paleontologists as a distinct monophyletic group and by others as an adaptive grade within the basal mosasauroids, recent molecular and morphological data suggests that they are the oldest known members of the lineage leading to the mosasaurs.