Tridactylidea
The infraorder Tridactylidea has a single extant superfamily which includes pygmy mole crickets; they are thought to be sister to all other lineages in the 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