Nysson mexicanus Cresson, 1882:275, ♂♀. 9 ♂♀, Mexico (leg. Sumichrast). - Handlirsch, 1887Handlirsch, A. 1887. Monographie der mit Nysson und Bembex verwandten Grabwespen. Sitzber.Akad.Wissn.Wien, Math.-Naturw.Classe 95, Abt. 1 95:246-421. (distribution); Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:70 (listed); Cameron, 1890Cameron, P. 1890. Biologia Centrali-Americana. Insecta. Hymenoptera. (Fossores) Vol. II. :65-129. (distribution); Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution). - As Paranysson mexicanus: - As Zanysson mexicanus: - 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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139. (distribution); Ohl & Krause, 2007Ohl, M. & S. Krause 2007. A remarkable new species of the digger wasp genus Zanysson Rohwer 1921 from Colombia (Hymenoptera: Apoidea, Crabronidae). Zootaxa 1442:43-54. (distribution); Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution).
Nysson longispinis Cameron, 1905:374, ♀. ♀, Mexico. - 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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1690 ( listed as synonym of Zanysson mexicanus (Cresson, 1882)).