Terminal phalanges have short recurved claws with a phalangeal formula of 2&colon;3&colon;4&colon;5&colon;3. As with the fingers, the toes are also called the digits, phalanges, and phalangeal area. The phalangeal formula is&colon; I-5, II-7, IV-6, V-3. The pedes are described to have a 2-3-4-5-5 phalangeal formula. The phalangeal formula of the foot is 2-3-4-5-0. The phalangeal formula was 2-3-4-5-3 for both hind- and forelimbs. The five-toed feet are quite similar to the hands, with phalangeal formula 2-3-4-5-3. "Petrolacosaurus" has a phalangeal formula for the manus of 2-3-4-5-3. It had a typical anomodont phalangeal formula of 2-3-3-3-3 on its forelimbs. Below the metatarsals, the five digits have a phalangeal formula of 2-3-4-5-1. The phalangeal formula was 2-2-2-2-2 instead of the ancestral 2-3-3-3-3. The phalangeal formula (number of phalanges per finger, from thumb to little finger) is 2-3-4-4-3.