Pamphilioidea

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: Pamphilioidea
Familiae (3): Megalodontesidae - Pamphiliidae - †Xyelydidae - Pamphylioidea incertae sedis
References

Wang, C., Shih, C-K., Rasnitsyn, A.P. & Wang, M. 2016. Two new species of Prolyda from the Middle Jurassic of China (Hymenoptera, Pamphilioidea). ZooKeys 569: 71-80. DOI: 10.3897/zookeys.569.7249 Reference page.

The Pamphilioidea are a small superfamily within the Symphyta (the sawflies), containing some 250 living species restricted to the temperate regions of Eurasia and North America. These hymenopterans share the distinctive feature of a very large, almost prognathous head, which is widest ventrally. The superfamily consists of two extant families.[1]
References

Aguiar et al 2013.

Bibliography

Aguiar, Alexandre P.; Deans, Andrew R.; Engel, Michael S.; Forshage, Mattias; Huber, John T.; Jennings, John T.; Johnson, Norman F.; Lelej, Arkady S.; Longino, John T.; Lohrmann, Volker; Mikó, István; Ohl, Michael; Rasmussen, Claus; Taeger, Andreas; Yu, Dicky Sick Ki (30 August 2013). "Order Hymenoptera". Zootaxa. 3703 (1): 51–62. doi:10.11646/zootaxa.3703.1.12. PMID 26146682., in Zhang, Z.-Q. (ed.) Animal Biodiversity: An Outline of Higher-level Classification and Survey of Taxonomic Richness (Addenda 2013)
Rasnitsyn, Alexandr P.; Zhang, Haichun & Wang, Bo (2006): Bizarre fossil insects: web-spinning sawflies of the genus Ferganolyda (Vespida, Pamphilioidea) from the Middle Jurassic of Daohugou, Inner Mongolia, China. Palaeontology 49(4): 907-916. doi:10.1111/j.1475-4983.2006.00574.x PDF fulltext
Wang, Mei; Rasnitsyn, Alexandr P.; Li, Hu; Shih, Chungkun; Sharkey, Michael J.; Ren, Dong (June 2016). "Phylogenetic analyses elucidate the inter-relationships of Pamphilioidea (Hymenoptera, Symphyta)". Cladistics. 32 (3): 239–260. doi:10.1111/cla.12129.