Along with more than 20 extinct genera, Tettigarctidae contains a single extant genus, Tettigarcta, with two extant species, one from southern Australia (T. crinita) and one from the island of Tasmania (T. tomentosa).

Numerous fossil species have been described from the Late Triassic onwards.

Tettigarcta are the closest living relatives of the true cicadas.

However, it has been argued that Tettigarctidae including all of these fossil species is a paraphyletic group that also includes some cicadas that are more closely related to Cicadidae than to Tettigarcta.

This Hemiptera article related to members of the insect suborder Auchenorrhyncha is a stub.