How many iguana species are there?

13 in all species of iguanas 1.green iguana 2.fujji iguana 3.spiney tailled iguana 4.blue iguana 5.rock iguana 6.land iguana 7.marine iguana 8. desart iguana 9. rhino iguana 10. cayman iguana 11. chuckwella 12. water dragon 13 basilisk/ Jesus Christ lizard