Among the families are Dermochelyidae: leatherback sea turtles, Emydidae: basking and box turtles, Alligatoridae: alligators and caiman, Gekkonidae: geckos, Corytophanidae: basilisks, and Varanidae: monitors.
The tongue and Jacobson's organ function as a chemosensory system in the autarchoglossa, a morphologically similar group of lizard families including Anguidae, Lacertidae, Scincidae, Teiidae, and Varanidae (Camp, 1923).