Simplify the following text for a Grade 12 native English-speaking person.
Original: Heterodontosauridae ( `` different-toothed lizards '' ) is a family of early ornithischian dinosaurs that were likely among the most basal ( primitive ) members of the group .
Simplified: Heterodontosauridae ( `` different-toothed lizards '' ) is a family of early ornithischian dinosaurs .