However, recent review of the genus has shown it to be a disparate group of species, and the Australian members moved to other genera.

Moulds conducted a morphological analysis of the genus and found the cicadas split naturally into clades according to biogeographical region.

[3] Phylogenetic evidence supports Tryella and Aleeta as being the closest relatives to the famous periodical cicadas (genus Magicicada) of North America despite being widely geographically separated from them.

Within the group, cladistic morphological analysis showed T. rubra to be the earliest offshoot within the genus.

[5][6] The species are found across eastern, central and northern Australia, and southwestern New Guinea, predominantly on trees, especially eucalypti.