| Lysoptychus Cope, 1888 |
| Lysoptychus lateralis Cope, 1888 |
| Petrosaurus Boulenger, 1885 |
| Petrosaurus mearnsi (Stejneger, 1894) |
| Petrosaurus mearnsi subsp. mearnsi (Stejneger, 1894) |
| Petrosaurus mearnsi subsp. slevini (Van Denburgh, 1922) |
| Petrosaurus repens (Van Denburgh, 1895) |
| Petrosaurus slevini (Van Denburgh, 1922) |
| Petrosaurus thalassinus (Cope, 1863) |
| Petrosaurus thalassinus subsp. repens (Van Denburgh, 1895) |
| Petrosaurus thalassinus subsp. thalassinus (Cope, 1863) |
| Phrynosoma Wiegmann, 1828 |
| Phrynosoma asio Cope, 1864 |
| Phrynosoma blainvillii Gray, 1839 |
| Phrynosoma braconnieri Bocourt, 1870 |
| Phrynosoma bufonium Wiegmann, 1828 |
| Phrynosoma cerroense Stejneger, 1893 |
| Phrynosoma cornutum (Harlan, 1825) |
| Phrynosoma coronatum (Blainville, 1835) |
| Phrynosoma coronatum subsp. blainvillii Gray, 1839 |