Xyelotomidae

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: Tenthredinoidea
Familia: †Xyelotomidae
Genera: Abrotoma – Dahurotoma – Davidsmithia – Kuengilarva – Leridatoma – Liaotoma – Paradoxotoma – Pseudoxyela – Pseudoxyelocerus – Synaptotoma – Undatoma – Vitimilarva – Xyelocerus – Xyelotoma

[list of genera after Gao, Ren & Shih (2009)]
Name

†Xyelotomidae Rasnitsyn, 1968
References

Gao, T.; Ren, D.; Shih, C. 2009: The first Xyelotomidae (Hymenoptera) from the Middle Jurassic in China. Annals of the Entomological Society of America, 102: 588–596. Full Text: [1]
Nel, A.; Petrulevicius, J.F.; Henrotay, M. 2004: New Early Jurassic sawflies from Luxembourg: the oldest record of Tenthredinoidea (Hymenoptera: "Symphyta"). Acta Palaeontologica Polonica, 49(2): 283–288. PDF