Complex sentence: The best known genus is "Trilophosaurus", a herbivore up to 2.5 meters long, had a short, unusually heavily-built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material.
Split into simpler sentences: The best known genus is "Trilophosaurus", a herbivore up to 2.5 meters long. It had a short, unusually heavily-built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material.