Ephialtitidae

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Hymenopterida
Ordo: Hymenoptera
Subordo: Symphyta
Superfamilia: †Ephialtitoidea

Familia: Ephialtitidae
Subfamiliae (2): Ephialtitinae - Symphytopterinae
Overview of genera (22)

Asiephialtites – Cratephialtites – Crephanogaster – Cretephialtites – Ephialtites – Karataus – Karataviola – Kotaphialtites – Leptephialtites – Liadobracona – Mesephialtites – Micrephialtites – Montsecephialtites – Parephialtites – Sessiliventer – Sinephialtites – Sippelipterus – Stephanogaster – Symphyogaster – Symphytopterus – Trigonalopterus – Tuphephialtites
References

Li, L.; Shih, C.; Ren, D. 2013: Two new wasps (Hymenoptera: Stephanoidea: Ephialtitidae) from the Middle Jurassic of China. Acta geologica sinica - English edition 87(6): 1486–1494. DOI: 10.1111/1755-6724.12152 Reference page.