Agama triangularis Blake, 1871:262 - Blake, 1879Blake, C.A. 1879. Catalogue of the Mutillidae of North America, with descriptions of new species. Transactions of the American Entomological Society 7:243-254. (distribution). - As Mutilla triangularis: - Fox, 1899Fox, W.J. 1899. The North American Mutillidae. Transactions of the American Entomological Society 25:219-300. (distribution). - As Photopsis triangularis: - Blake, 1886Blake, C. 1886. Monograph of the Mutillidae of North America. Transactions of the American Entomological Society 13:179-286. (distribution). - As Sphaeropthalma triangularis: - 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); Pagliano et al., 2020Pagliano G., D.J. Brothers, R. Cambra, A.S. Lelej, P. Lo Cascio, M.M. Palmerini, P.L. Scaramozzino, K.A. Williams & M. Romano 2020. Checklist of names in Mutillidae (Hymenoptera), with illustrations of selected species. Bolletino del Museo Regionale di Scienze naturali Torino 36 (1-2):5-425. (distribution).
Mutilla triangularis Cameron, 1894:300, ♀. ♀, Panama, Bugaba (leg. Champion); Quintero & Cambra, 2001Quintero, A.D. & R.A. Cambra 2001. On the identity of Scaptopoda F. Lynch Arribálzaga, new taxonomic changes and new distribution records for neotropical Mutillidae (Hymenoptera), with notes on their biology. Transactions of the American Entomological Society 127 (3):291-304.:298, Holotype ♀ (BMNH, type 15.1000). - Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:300 (listed). - As Ephuta triangularis: - Quintero & Cambra, 2001Quintero, A.D. & R.A. Cambra 2001. On the identity of Scaptopoda F. Lynch Arribálzaga, new taxonomic changes and new distribution records for neotropical Mutillidae (Hymenoptera), with notes on their biology. Transactions of the American Entomological Society 127 (3):291-304. (distribution); Añino et al., 2020Añino, Y.J., R.A. Cambra, D.M. Windsor & K.A. Williams 2020. Seasonal and annual abundance of Ephuta wasp (Hymenoptera: Mutillidae) in Panama. Revista de Biología Tropical (International Journal of Tropical Biology and Conservation) 68 (2):573-579. (distribution); Pagliano et al., 2020Pagliano G., D.J. Brothers, R. Cambra, A.S. Lelej, P. Lo Cascio, M.M. Palmerini, P.L. Scaramozzino, K.A. Williams & M. Romano 2020. Checklist of names in Mutillidae (Hymenoptera), with illustrations of selected species. Bolletino del Museo Regionale di Scienze naturali Torino 36 (1-2):5-425. (distribution).
Mutilla Rileyi Dalla Torre, 1897:78, no descr. Replacement name for Mutilla triangularis Cameron, 1894 by Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749.:78 (nec Blake). - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution); Pagliano et al., 2020Pagliano G., D.J. Brothers, R. Cambra, A.S. Lelej, P. Lo Cascio, M.M. Palmerini, P.L. Scaramozzino, K.A. Williams & M. Romano 2020. Checklist of names in Mutillidae (Hymenoptera), with illustrations of selected species. Bolletino del Museo Regionale di Scienze naturali Torino 36 (1-2):5-425.:217 ( listed as synonym of Ephuta triangularis (Cameron, 1894)).
Rhoptromutilla furcata André, 1905:367, Quintero & Cambra, 2001Quintero, A.D. & R.A. Cambra 2001. On the identity of Scaptopoda F. Lynch Arribálzaga, new taxonomic changes and new distribution records for neotropical Mutillidae (Hymenoptera), with notes on their biology. Transactions of the American Entomological Society 127 (3):291-304.:298, Syntype ♂ (MNHN). Synonymized with Ephuta triangularis (Cameron, 1894) by Quintero & Cambra, 2001Quintero, A.D. & R.A. Cambra 2001. On the identity of Scaptopoda F. Lynch Arribálzaga, new taxonomic changes and new distribution records for neotropical Mutillidae (Hymenoptera), with notes on their biology. Transactions of the American Entomological Society 127 (3):291-304.:298. - Pagliano et al., 2020Pagliano G., D.J. Brothers, R. Cambra, A.S. Lelej, P. Lo Cascio, M.M. Palmerini, P.L. Scaramozzino, K.A. Williams & M. Romano 2020. Checklist of names in Mutillidae (Hymenoptera), with illustrations of selected species. Bolletino del Museo Regionale di Scienze naturali Torino 36 (1-2):5-425.:217 ( listed as synonym of Ephuta triangularis (Cameron, 1894)).
Ephuta forceps Schuster, 1945:195, Quintero & Cambra, 2001Quintero, A.D. & R.A. Cambra 2001. On the identity of Scaptopoda F. Lynch Arribálzaga, new taxonomic changes and new distribution records for neotropical Mutillidae (Hymenoptera), with notes on their biology. Transactions of the American Entomological Society 127 (3):291-304.:298, Holotype ♂ (USNM, type 57836). Synonymized with Ephuta triangularis (Cameron, 1894) by Quintero & Cambra, 2001Quintero, A.D. & R.A. Cambra 2001. On the identity of Scaptopoda F. Lynch Arribálzaga, new taxonomic changes and new distribution records for neotropical Mutillidae (Hymenoptera), with notes on their biology. Transactions of the American Entomological Society 127 (3):291-304.:298. - Pagliano et al., 2020Pagliano G., D.J. Brothers, R. Cambra, A.S. Lelej, P. Lo Cascio, M.M. Palmerini, P.L. Scaramozzino, K.A. Williams & M. Romano 2020. Checklist of names in Mutillidae (Hymenoptera), with illustrations of selected species. Bolletino del Museo Regionale di Scienze naturali Torino 36 (1-2):5-425.:217 ( listed as synonym of Ephuta triangularis (Cameron, 1894)).