Mutilla singularis Spinola, 1841:95, ♂. 2 ♂♂, Cayenne (leg. M. Leprieur); 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.:299, Lectotype ♂ (MRSN). - Smith, 1855Smith, F. 1855. Catalogue of Hymenopterous Insects in the collection of the British Museum. Part III, Mutillidae and Pompilidae. :203 pp, 5 pl. (distribution); Gerstäcker, 1874Gerstäcker, A. 1874. Mutillarum Americae meridionalis indigenarum synopsis systematica et synonymica. (Fortsetzung von p. 77.). Archiv für Naturgeschichte 40:299-328. (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 Ephuta singularis: - Mickel, 1952Mickel, C.E. 1952. The Mutillidae (Wasps) of British Guiana. Zoologica (New York) 37 (3):105-150. (distribution); 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); Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (distribution); Lo Cascio, 2015Lo Cascio, P. 2015. Worldwide checklist of the island mutillid wasps (Hymenoptera Mutillidae). biodiversity Journal 6 (2):529-592. (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 solitaria Smith, 1879:214, 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.:299, Holotype ♀ (BMNH, type 15.991). Synonymized with Ephuta singularis (Spinola, 1841) 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.:299. - 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 singularis (Spinola, 1841)).
Mutilla catinga Cresson, 1902:64 Synonymized with Ephuta singularis (Spinola, 1841) by Mickel, 1952Mickel, C.E. 1952. The Mutillidae (Wasps) of British Guiana. Zoologica (New York) 37 (3):105-150.:110. - 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 singularis (Spinola, 1841)).
Ephuta violacea Schuster, 1945:193, 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.:299, Holotype ♂ (USNM, type 57835). Synonymized with Ephuta singularis (Spinola, 1841) 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.:299. - 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 singularis (Spinola, 1841)).