Fig. 1From: Male spiny frogs enter the underwater battlefield with loose skin exhibiting enhanced penetration of capillaries into the epidermisTwo male nuptial traits in Leptobrachium boringii, maxillary spines and loose skin, and ten sampling locations of skin sections. 1: dorsal head; 2: back; 3: dorsal forearm; 4: dorsal distal hindlimb; 5: lateral abdomen; 6: ventral head; 7: chest; 8: posterior belly; 9: ventral forearm; 10: ventral proximal hindlimbBack to article page