Alternative spelling: Trigonaloidea
Parent taxon: Apocrita according to M. S. Engel 2016
See also Sharkey et al. 2012
Sister taxa: Aculeata, Apiaria lapidea, Apocritites, Armaniidae, Asiacynipites, Brachycleistogastromorpha, Ceraphronoidea, Dendrocerus dubitatus, Eucynipites, Evanioidea, Evaniomorpha, Ichneumonoidea, Khutelchalcididae, Kuafuidae, Limnetidae, Longhuaia, Megalyroidea, Panguoidea, Proctotrupomorpha, Stephanoidea, Stephanomorpha
Subtaxa: Maimetshidae Trigonalidae
Ecology:
Distribution:
• Oligocene of Germany (1 collection)
• Eocene of Canada (2: British Columbia), the Russian Federation (1)
• Cretaceous of Botswana (1), Canada (1: Alberta), France (2), Lebanon (2), Mongolia (1), Myanmar (2), the Russian Federation (3), Spain (1), the United Kingdom (2)
Total: 19 collections including 25 occurrences