Stizus spectabilis Taschenberg, 1875:360 - As Sphecius spectabilis: - Handlirsch, 1889Handlirsch, A. 1889. Monographie der mit Nysson und Bembex verwandten Grabwespen. IV. Sitzber. Akad. Wiss. Wien Abt. 1 98:440-517. (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); Menke, 1996Menke, A.S. 1996. Sphecius spectabilis (Taschenberg) in Colombia. Sphecos 30:11. (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); Holliday & Coelho, 2006Holliday, C.W. & J.R. Coelho 2006. Improved key to New World species of Sphecius (Hymenoptera: Crabronidae). Annals of the Entomological Society of America 99 (5):793-798. (distribution); Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (distribution).
Sphecius spectabilis nobilis Brèthes, 1910:281 - 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.:18 ( listed as synonym of Sphecius spectabilis (Taschenberg, 1875)).