English: Teeth of Ceratophrys cranwelli. As with almost all other extant frogs bearing teeth, Ceratophrys has teeth only on the upper jaw. Unusual among frogs, the teeth of Ceratophrys exhibit a derived non-pedicellate morphology and have sharp recurved tips situated upon robust, labiolingually expanded bases. (a) view of teeth with jaws closed; (b) view of teeth with mouth slightly open; (c) close-up of single tooth. Scale bars = 1 mm.