Fig. 2: Tetrapod extremity of Acanthostega with 8 fingers. Typical structure of the tetrapod extremity: humerus and respectively femur are flexibly joined with the shoulder girdle , followed by a pair of bones (ulna and radius in the front extremity and respectively tibia and fibula in the hind extremity) und finally by hand and accordingly tarsal bones and the phalanges.
according to Clack JA (2002) Gaining Ground. The Origin and Evolution of Tetrapods. Bloomington, IN.