"This is the only genus where the presence of tarsal spurs is seen in several of the species ( Ch. arabicus,Ch. monachus, Ch. chamaeleon, Ch. necasi, Ch zeylanicus, Ch. dilepis, Ch. gracilis, Ch. calyptratus,Ch. africanus). These tend to be best developed in males and usually absent or much reduced in females. Tarsal spurs may be a synapomorphy for the genus Chamaeleo."
http://treatment.plazi.org/id/03E487A6-3E21-421B-3385-FC05FE334D36
http://treatment.plazi.org/id/03E487A6-3E21-421B-3385-FC05FE334D36
