Fig. 10

Tetrapod autopodia are dorsoventrally flattened, except in chameleons. Chameleon autopodia (C. calyptratus; a-d) while retaining the pentadactyl complement of digits, not only have a distal cleft separating the digits III and IV in the hand (a, b) and II and III in the foot (c, d) but also develop a rosette shaped cluster of metacarpals and metatarsals around a central enlarged distal carpal element. In species (humans) with congenital distal clefting (e, f), clefting does not alter the dorsoventrally flattened morphology