Furthermore , the primitive jaw joint between the articular and quadrate bones , which in modern mammals has moved into the middle ear and become part of the ear ossicles as malleus and incus , is still to be found in Morganucodon . Furthermore , the primitive reptilian jaw joint between the articular and quadrate bones , which in modern mammals has moved into the middle ear and become part of the ear ossicles as malleus and incus , is still to be found in Morganucodon .