Metaphycus nadius är en stekelart som först beskrevs av Walker 1838. Metaphycus nadius ingår i släktet Metaphycus och familjen sköldlussteklar. Inga underarter finns listade i Catalogue of Life.
Källor Boucek, Z.; Graham, M.W.R. de V. (1978) British check-list of Chalcidoidea (Hymenoptera): taxonomic notes and additions., JOURBOOK: Entomologist's Gazette VOLUME: 29(4) PAGES: 225-235 Noyes, J.S. (2004) Encyrtidae of Costa Rica (Hymenoptera: Chalcidoidea), 2. |Metaphycus| and related genera, parasitoids of scale insects (Coccoidea) and whiteflies (Aleyrodidae)., JOURBOOK: Memoirs of the American Entomological Institute VOLUME: 73 PAGES: 459pp UCD: Universal Chalcidoidea Database. Noyes J., 2007-09-17 Mercet, R.G. (1921) Fauna Iberica. Himenopteros Fam. Encírtidos., PAGES: 727 pp Guerrieri, E.; Noyes, J.S. (2000) Revision of European species of genus |Metaphycus| Mercet (Hymenoptera: Chalcidoidea: Encyrtidae), parasitoids of scale insects., JOURBOOK: Systematic Entomology VOLUME: 25 PAGES: 147-222 Noyes, J.S. (1981) On the types of the species of Encyrtidae described by R. Garcia Mercet (Hymenoptera: Chalcidoidea)., JOURBOOK: Eos. Revista Española di Entomologia. Madrid. VOLUME: 55/56 PAGES: 165-189 Mercet, R.G. (1917) Especies españolas del género |Aphycus|., JOURBOOK: Boletin de la Real Sociedad Española de Historia Natural VOLUME: 17 PAGES: 128-139 Trjapitzin, V.A. (1975) Contribution to the knowledge of parasitic Hymenoptera of the genus |Metaphycus| Mercet, 1917 (Hymenoptera, Chalcidoidea, Encyrtidae) of the Czechoslovakian fauna., JOURBOOK: Studia Entomologica Forestalia VOLUME: 2(1) PAGES: 5-17 Mercet, R.G. (1925) El género |Aphycus| y sus afines., JOURBOOK: Eos. Revista Española di Entomologia. Madrid. VOLUME: 1 PAGES: 7-31 Chumakova, B.M. (1961) Parasites of injurious scale insects from Kabardino-Balkaria (Hymenoptera, Chalcidoidea)., JOURBOOK: Entomologicheskoe Obozrenie VOLUME: 40(2) PAGES: 315-338 Alam, S.M. (1957) The taxonomy of some British encyrtid parasites (Hymenoptera) of scale insects (Coccidoidea)., JOURBOOK: Transactions of the Royal Entomological Society of London VOLUME: 109(15) PAGES: 421-466 Walker, F. (1838) Monographia Chalciditum. (Continued.), JOURBOOK: Entomological Magazine VOLUME: 5(5) PAGES: 418-431
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