Final answer:
The statement that Tetanuran teeth all occur anterior to the orbit is false because many tetanuran dinosaurs had teeth extending under the eye socket, not just in front of it.
Step-by-step explanation:
The statement that Tetanuran teeth all occur anterior to the orbit is false. Tetanuran dinosaurs, a clade of theropod dinosaurs, typically had teeth that extended posterior to the orbit. Tetanurans include well-known species such as Allosaurus and Tyrannosaurus, among others. Their dental arrangement varied, but many had teeth that extended along the jawline, passing beneath the eye socket or orbit. Therefore, not all their teeth were located anterior (in front) of the orbit.
In contrast to amphibians, which may have pedicellate teeth and a more limited arrangement of teeth that can occur in both jaws and sometimes in multiple rows as stated, Tetanuran carnivorous dinosaurs had more complex and variably sized teeth depending on their prey and feeding habits. These teeth included small front teeth, like incisors and canines, as well as relatively large molars for processing meat, which is evidenced by fossil records and comparisons with other theropods.