†subfamily Triassagrioninae Tillyard 1922
Insecta - Dicondylia - Protomyrmeleontidae
Alternative spelling: Triassagrionidae
Full reference: R. J. Tillyard. 1922. Mesozoic Insects of Queensland. No. 9 Orthoptera, and additions to the Protorthoptera, Odonata, Hemiptera and Planipennia. The Proceedings of the Linnean Society of New South Wales 47:447-470
Parent taxon: Protomyrmeleontidae according to I. Deregnaucourt et al. 2019
See also Carpenter 1992, Tillyard 1922 and Tillyard 1923
Sister taxa: Malmagrion, Protomyrmeleontinae
Subtaxa: Triassagrion
Type: Triassagrion
Distribution: found only at Denmark Hill Insect Bed (Dunstan 1915-1916 collection) (Triassic of Australia)