Giant horned lizard, Phrynosoma asio Cope, 1864
Phrynosoma bauri Montanucci, 2015
Phrynosoma blainvillii Gray, 1839
Short-tailed horned lizard, Phrynosoma braconnieri A.H.A. Duméril, 1870
Phrynosoma brevirostris (Girard, 1858)
Cedros Island horned lizard, Phrynosoma cerroense Stejneger, 1893
Texas horned lizard, Phrynosoma cornutum (Harlan, 1825)
Coast horned lizard, Phrynosoma coronatum (Blainville, 1835)
Cape horned lizard, P. c. coronatum (Blainville, 1835)
California horned lizard, P. c. frontale Van Denburgh, 1894
Central peninsular horned lizard, P. c. jamesi Schmidt, 1922
Phrynosoma diminutum Montanucci, 2015
Ditmars' horned lizard or rock horned lizard, Phrynosoma ditmarsi Stejneger, 1906
Pygmy short-horned lizard, Phrynosoma douglasii (Bell, 1828)
Phrynosoma goodei Stejneger, 1893
Greater short-horned lizard, Phrynosoma hernandesi Girard, 1858
Flat-tail horned lizard, Phrynosoma mcallii (Hallowell, 1852)
Roundtail horned lizard, Phrynosoma modestum Girard, 1852
Comparison of P. modestum and P. platyrhinos
Mexican Plateau horned lizard or Chihuahua Desert horned lizard, Phrynosoma orbiculare (Linnaeus, 1758)
P. o. bradti Horowitz, 1955
P. o. cortezii (A.H.A. Duméril & Bocourt, 1870)
P. o. dugesii (A.H.A. Duméril & Bocourt, 1870)
P. o. orbiculare (Linnaeus, 1758)
P. o. orientale Horowitz, 1955
Phrynosoma ornatissimum (Girard, 1858)
Desert horned lizard, Phrynosoma platyrhinos Girard, 1852
Southern desert horned lizard, P. p. calidiarum (Cope, 1896)
Northern desert horned lizard, P. p. platyrhinos Girard, 1852
Phrynosoma sherbrookei Nieto-Montes de Oca et al., 2014
Regal horned lizard, Phrynosoma solare Gray, 1845
Mexican horned lizard, Phrynosoma taurus Dugès, 1873
Gulf Coast horned lizard, Phrynosoma wigginsi Montanucci, 2004
