Cryptus sororius Cresson, 1872:159, ♂. 2 ♂♂, Texas (Belfrage); Townes & Townes, 1962Townes, H.K. & M. Townes 1962. Ichneumon-flies of America north of Mexico: 3. Subfamily Gelinae, tribe Mesostenini. Bulletin of the United States National Museum 216 (3):1-602.:273, Lectotype ♀ (Philadelphia); Kasparyan & Ruíz-Cancino, 2005Kasparyan, D.R. & E. Ruíz-Cancino 2005. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae). Parte I. :1-286.:137, Lectotype ♀ (Mus. Filadelfia). - Dalla Torre, 1901-1902Dalla Torre, C.G. 1901-1902. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. — Volumen III: Trigonalidae, Megalyridae, Stephanidae, Ichneumonidae, Agriotypidae, Evaniidae, Pelecinidae. Pars II. Breitkopf & Härtel, Leipzig. VIII + 1141. (distribution). - As Lanugo sororia: - Townes & Townes, 1962Townes, H.K. & M. Townes 1962. Ichneumon-flies of America north of Mexico: 3. Subfamily Gelinae, tribe Mesostenini. Bulletin of the United States National Museum 216 (3):1-602. (distribution), 273 (comb. nov.); 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); Ruíz-Cancino et al., 2002Ruíz-Cancino, E., D.R. Kasparyan & J.M. Coronado Blanco 2002. Ichneumonidae. In: Llorente Bousquets, J. & J.J. Morrone (Ed.). Biodiversidad, taxonomía y biogeografía de artrópodos de México: Hacia una síntesis de su conocimiento, volumen III. 631-646. (distribution); Kasparyan & Ruíz-Cancino, 2005Kasparyan, D.R. & E. Ruíz-Cancino 2005. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae). Parte I. :1-286. (distribution); Castillo et al., 2014Castillo Flores, P.M., E. Ruíz Cancino, J.M. Coronado Blanco, A.I. Khalaim & S.N. Myartseva 2014. Ichneumonidae (Hymenoptera: Ichneumonoidea) en un bosque de Quercus de Tamaulipas, México. Dugesiana 21 (2):161-174. (distribution).