Masiakasaurus was a small dinosaur from Madasgascar. Its most unique feature were its teeth and jaws. It was probably a fish-eater, although some palaeontologists suggested they were used to catch insects. It was likely not an apex of its range since it was probably preyed on by the 20 foot long terror Majungasaurus.
The Masiakasaurus doesn't appear in any of the films or novels, but it can be created in Jurassic Park III: Park Builder.