Photographs of the dissected left forelimb of male Ailurus fulgens. (a) Ventral view; (b) medial view. 1, first digit; 5, fifth digit; apbo, muscles abductor pollicis brevis and opponens pollicis; apl, muscle abductor pollicis longus; fbdm, muscle flexor brevis digitorum manus; fr, flexor retinaculum; i-fr, insertion of flexor retinaculum on radial sesamoid; cI, first metacarpal; p, pisiform; rs, radial sesamoid (notice that instead of the actual bone, it is the distal cartilaginous cap that is visible in these images).