Uma inornata (Baird 1859) is the extant fringe-toed lizard. They like sandy deserts and eat insects. Flaps and interlocking scales prevent sand from entering the nose, mouth, eyes and ears. Uma nests with Phrynosoma (below) in the LRT. The skull is shown at Digimorph.org.

Phrynosoma modestum (Wiegmann 1828) [extant] is a member of one of the two recognized and extant lizard families, the Iguania. This ant-eating, flat horned lizard was a sister to Trioceros and was a more distant sister to Iguana and Draco.

Not closely related to the Australian thorny devil, Moloch horridus.

Skeletal data provided by Steve Huskey, Ph.D.

Baird SF 1859. Description o new genera an species of North American lizards in the Museum of the Smithsonian Institution. Proceedings of the Academy of Natural Science: 253–256.

Wiegmann AF 1828. Beyträge zur Amphibien-kunde. Isis von Oken 21(3/4): 364-383.

wiki/Horned_lizard
digimorph/Phrynosoma
wiki/Fringe-toed_lizard
digimorph.org/Uma_scoparia/