Complex sentence: Salamanders do not have claws and the shape of the foot varies according to the animal's habitat, with climbing species having elongate, square-tipped toes and rock-dwellers having larger feet with short blunt toes.
Split into simpler sentences: Salamanders do not have claws, and the shape of the foot varies according to the animal's habitat. Climbing species have elongate, square-tipped toes, while rock-dwellers have larger feet with short blunt toes.