Cephoidea

Superregnum: Eukaryota
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: Cephoidea
Familiae (2): Cephidae - †Sepulcidae
Name

Cephoidea
Vernacular names
English: Stem Sawflies
日本語: クキバチ上科

Cephoidea is a small superfamily within the Symphyta, commonly referred to as stem sawflies, containing some 100 species in 10 genera in the living family, Cephidae, plus another 17 genera in the extinct family Sepulcidae.[1][2] Most species occur in the Northern Hemisphere, especially in Eurasia. The larvae are stem borers in various plants, especially grasses, but sometimes other herbaceous plants, shrubs, or trees. A few are pests of cereal grains (e.g. Cephus cinctus, which attacks wheat). They are exceptionally slender for symphytans, often resembling other types of wasps, and they are the only Symphyta which lack cenchri. They are sometimes postulated to be the sister taxon to the Apocrita, though the Orussidae are more commonly considered such.
Calameuta filiformis
References

Kopylov, D. S.; Rasnitsyn, A. P. (2014). "New Trematothoracinae (Hymenoptera: Sepulcidae) from the Lower Cretaceous of Transbaikalia". Proceedings of the Russian Entomological Society. 85 (1): 199–206.

Kopylov, D. S.; Rasnitsyn, A. P. (2016). "Cephidae (Hymenoptera) of the Mesozoic". Euroasian Entomological Journal. 15 (1): 78–83.

Goulet, H.; Huber, J., eds. (1993). Hymenoptera of the world: an identification guide to families. Agriculture Canada Publication. Vol. 1894/E. Research Branch, Agriculture Canada.
Krombein, Karl V.; Hurd, Paul D. Jr.; Smith, David R.; Burks, B. D., eds. (1979). Catalog of Hymenoptera in America North of Mexico. Vol. 1. Smithsonian Institution Press.
Sharkey, M. J.; Carpenter, J. M.; Vilhelmsen, L. (2012). "Phylogenetic relationships among superfamilies of Hymenoptera" (PDF). Cladistics. 28 (1): 80–112. doi:10.1111/j.1096-0031.2011.00366.x. ISSN 0748-3007.