Figure 1

Digit form in adult Tarentola annularis . (A) Dorsal view of the left pes. Roman numerals I to V indicate the first to fifth digits, respectively. Note the raised penultimate phalanx that forms a longitudinal ridge on the distal ends of digits III and IV. This carries a large recurved claw that tips the ungual phalanx of each of these digits. Digits I, II, and V lack this ridge, and no claw is evident on these digits. (B-F) Dorsal aspect of, from left to right, pedal digits I to V. Note the raised ridge of the penultimate phalanx on digits III and IV that carries the large ungual phalanx and claw beyond the distal extremity of the subdigital adhesive pad. Digits I, II, and V (b, c, and f, respectively) lack this ridge. (G-K) Ventral aspect of, from left to right, pedal digits I to V, showing the large claw that extends beyond the distal extremity of the adhesive pad on digits III and IV, and the absence of a visible claw on digits I, II, and V. (L) Lateral view of the distal extremity of pedal digit II with the skin removed, revealing the elongate, gently curved ungual phalanx (arrow) supporting the distal end of the adhesive pad (setal fields denoted by an asterisk). (M) Lateral view of the distal extremity of pedal digit III with the skin removed, displaying large, strongly-curved claw that extends distally beyond the adhesive pad. (N) Lateral view of ungual phalanx of pedal digit II with the surrounding soft tissue removed. (O) Lateral view of the distal ungual phalanx and claw sheath of pedal digit III with the surrounding soft tissue removed. (P) Needle-like claw present on digit II of the pes. Scale bars, 1 mm.