 The upper and lower jaws contain 14–15 and 12–14 tooth rows on either side respectively; in addition, there are one or two rows of small teeth at the upper and lower symphyses (jaw midpoints).The upper teeth have a single narrow, smooth-edged central cusp, flanked on both sides by very large serrations.The lower teeth are narrower and more upright than the uppers, and may be smooth to finely serrated.