Pelopeus aztecus Saussure, 1868:26, ♂♀. 5 ♂♂, 3 ♀♀, Mexico calida et temperata. - As Chalybion aztecum: - Cameron, 1888Cameron, P. 1888. Biologia Centrali-Americana. Insecta. Hymenoptera. (Fossores) Vol. II. :1-33. (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.:25 (listed). - As Chalybion zimmermanni aztecum: - 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); Horta Vega et al., 2007Horta Vega, J.V., O.N. Pinson Domínguez, L. Barrientos Lozano & A. Correa Sandoval 2007. Sphecidae y Crabronidae (Hymenoptera) de algunos municipios del centro y sur de Tamaulipas, México. Acta Zool. Mex. (n.s.) 23:35-48. (distribution); Vanoye-Eligio et al., 2014Vanoye-Eligio, M., V. Meléndez-Ramírez, R. Ayala, J. Navarro & H. Delfin-González 2014. Predatory Wasps (Hymenoptera) of the Yucatan Peninsula. Southwestern Entomoloigst 39 (3):635-646. (distribution); Vanoye-Eligio et al., 2015Vanoye-Eligio, M., V. Meléndez-Ramírez, R. Ayala, J. Navarro-Alberto & H. Delfín-González 2015. Avispas depredadoras de áreas naturales protegidas del estado de Yucatán, México. Revista Mexicana de Biodiversidad 86:989-997. (distribution). - As Pelopaeus aztecus: - Hutson, 1919Hutson, J.C. 1919. The North American species of the genus Sceliphron (Hymenoptera). Transactions of the American Entomological Society 45 (3):203-227.:223 ( listed as synonym of Sceliphron zimmermanni (Dahlbom, 1843)). - As Pelopoeus aztecus: - Kohl, 1918Kohl, F.F. 1918. Die Hautflüglergruppe 'Sphecinae'. IV. Teil. Die natürliche Gattung Sceliphron Klug (Pelopoeus Latr.). Annalen des Naturhistorischen Museums in Wien 32:1-171.:59 ( listed as synonym of Sceliphron zimmermanni (Dahlbom, 1843)). - As Sceliphron aztecum: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 378 (comb. nov.).
Sceliphron monstrosum Kohl, 1918:46 (key), 61, ♂.Mittelamerika (zwischen San Louis und Tampico) (Mus. zool. Berol.). - 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.:1577 ( listed as synonym of Chalybion zimmermanni aztecum (Saussure, 1868)); 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.:71 ( listed as synonym of Chalybion zimmermanni aztecum (Saussure, 1868)).