Tridactylidea

The infraorder Tridactylidea has a single extant superfamily which includes pygmy mole crickets; they are thought to represent living representatives of the most basal Caelifera: the Orthopteran suborder that includes grasshoppers.

Superfamilies and families
The infraorder consists of two superfamilies, one living and one extinct; the Orthoptera Species File lists the following:
 * †Dzhajloutshelloidea Gorochov, 1994
 * †Dzhajloutshellidae Gorochov, 1994
 * †Regiatidae Gorochov, 1995
 * Tridactyloidea Brullé, 1835
 * Cylindrachetidae Giglio-Tos, 1914
 * Ripipterygidae Ander, 1939
 * Tridactylidae Brullé, 1835