The Cuban rock iguana's generic name Cyclura is derived from the Ancient Greek cyclos (κύκλος) meaning "circular" and ourá (οὐρά) meaning "tail", after the thick-ringed tail characteristic of all Cyclura [REF].
The closest relatives of Cyclura nubila are the Grand Cayman blue iguana (Cyclura lewisi) and the Northern Bahamian rock iguana (Cyclura cychlura); phylogenetic analysis indicates that these three species diverged from a common ancestor three million years ago [REF].