Ismaridae

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: Apocrita
Superfamilia: Diaprioidea

Familia: Ismaridae
Genera (1): Ismarus
Name

Ismaridae
References

Kim, C.J., Notton, D.G., Ødegaard, F. & Lee, J.W. 2018. Review of the Palaearctic species of Ismaridae Thomson, 1858 (Hymenoptera: Diaprioidea). European Journal of Taxonomy 417: 1–38. Full article (PDF). Reference page.
Masner, L. 1976: A revision of the Ismariinae [Ismarinae] of the New World (Hymenoptera, Proctotrupoidea, Diapriidae). Canadian entomologist, 108(11): 1243–1266. DOI: 10.4039/Ent1081243-11 [abstract only seen]
Sharkey, M.J. et al. (early view, 2011): Phylogenetic relationships among superfamilies of Hymenoptera. Cladistics, DOI: 10.1111/j.1096-0031.2011.00366.x

Ismaridae is a family of insects belonging to the order Hymenoptera. About 50 species are known in this small relictual group; all the species for which the biology is known appear to be hyperparasitoids that parasitize Dryinidae (that attack leafhoppers).

This lineage was formerly included in the family Diapriidae, as the subfamily Ismarinae, but differ from diapriid wasps by lacking a facial projection from which the antenna arise, and characterized by various degrees of fusion of the metasomal terga. The family historically included only two genera, Ismarus and Szelenyioprioides,[1] though the latter genus was recently synonymized with the diapriid genus Spilomicrus,[2] thereby restricting the family to solely Ismarus.[3]
References

Liu, J., Chen, H., & Xu, Z. (2011). Notes on the genus Ismarus Haliday (Hymenoptera, Diapriidae) from China. ZooKeys, (108), 49–60. Advance online publication. http://doi.org/10.3897/zookeys.108.768
V. Kolyada & V. Chemyreva (2016) Revision Of Species Of The Genus: Ismarus Haliday, 1835 (Hymenoptera: Diaprioidea: Ismaridae) Of The Russian Fauna. Far Eastern Entomologist 318: 1-19.
Chang-Jun Kim, Robert Copland & David Notton (2018) The family Ismaridae Thomson (Hymenoptera, Diaprioidea): first record for the Afrotropical region with description of fourteen species new to science. African Invertebrates 59(2):127-163.