The claws of the gekkonine gecko genus Ailuronyx are unique in being asymmetrically disposed. Those of digits I-III are curved towards the body, whereas those of digits IV and V curve away from the body. This ungual asymmetry is imposed upon the essentially symmetrical pedal morphology that typifies pad-bearing geckos. The resultant functional organization of manus and pes parallels that seen in chameleons. The pedal configuration of Ailuronyx seychellensis appears to provide a mechanical advantage for locomotion on at least some of the animal's natural substrata.