Polygnotus solidaginis Ashmead, 1887:131, Ashmead, 1893Ashmead, W.H. 1893. A monograph of the North American Proctotrypidae. Bulletin of the United States National Museum 45:1-472.:307, Types (National Museum and Coll. Ashmead); Fouts, 1924Fouts, R.M. 1924. Revision of the North American wasps of the subfamily Platygasterinae. Proceedings of the United States National Museum 63 (art. 15):1-145.:66, Type (U.S.N.M., No. 24606); Masner & Muesebeck, 1968Masner, L. & C.F.W. Muesebeck 1968. The Types of Proctotrupoidea (Hymenoptera) in the United States National Museum. 270:1-143.:95, Lectotype ♀ (USNM, no. 2862). - Ashmead, 1893Ashmead, W.H. 1893. A monograph of the North American Proctotrypidae. Bulletin of the United States National Museum 45:1-472. (distribution); Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, V. Chalcididae et Proctotrupidae. Sumptibus Guilelmi Engelmann, VII + 598. (distribution). - As Platygaster solidaginis: - Fouts, 1924Fouts, R.M. 1924. Revision of the North American wasps of the subfamily Platygasterinae. Proceedings of the United States National Museum 63 (art. 15):1-145. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198. (distribution).
Polygnotus angulatus Ashmead, 1893:304 (key), 319, ♂. Types, Jacksonville, Fla. (Coll. Ashmead); Fouts, 1924Fouts, R.M. 1924. Revision of the North American wasps of the subfamily Platygasterinae. Proceedings of the United States National Museum 63 (art. 15):1-145.:66, Type (U.S.N.M., No. 25439). - Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, V. Chalcididae et Proctotrupidae. Sumptibus Guilelmi Engelmann, VII + 598. (distribution); Fouts, 1924Fouts, R.M. 1924. Revision of the North American wasps of the subfamily Platygasterinae. Proceedings of the United States National Museum 63 (art. 15):1-145.:65 ( listed as synonym of Platygaster solidaginis (Ashmead, 1887)); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198.:1181 ( listed as synonym of Platygaster solidaginis (Ashmead, 1887)).