Mutilla quadrum Klug, 1821:320, Bartholomay, 2014Bartholomay, P.R. 2014. . Dissertation , . Manaus, Amazonas.:68, Holotype ♀ (Museum für Naturkunde Berlin, Berlim, Alemanha), Lectotype ♀, examined (ZMB), designated by Bartholomay et al., 2019Bartholomay, P.R., K.A. Williams, V.M. Lopez & M.L. Oliveira 2019. Revision of the Traumatomutilla americana species group (Hymenoptera: Mutillidae). Zootaxa 4608 (1):1-34.:21. - Gerstäcker, 1874Gerstäcker, A. 1874. Mutillarum Americae meridionalis indigenarum synopsis systematica et synonymica. Archiv für Naturgeschichte 40 (1):41-77. (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); Cresson, 1902Cresson, E.T. 1902. Descriptions of some Mutilla from Brazil. Transactions of the American Entomological Society 28:1-82. (distribution). - As Traumatomutilla quadrum: - Bartholomay et al., 2019Bartholomay, P.R., K.A. Williams, V.M. Lopez & M.L. Oliveira 2019. Revision of the Traumatomutilla americana species group (Hymenoptera: Mutillidae). Zootaxa 4608 (1):1-34. (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 hybrida Burmeister, 1854:24, Bartholomay et al., 2019Bartholomay, P.R., K.A. Williams, V.M. Lopez & M.L. Oliveira 2019. Revision of the Traumatomutilla americana species group (Hymenoptera: Mutillidae). Zootaxa 4608 (1):1-34.:21, Holotype ♀ (MLUH). - Gerstäcker, 1874Gerstäcker, A. 1874. Mutillarum Americae meridionalis indigenarum synopsis systematica et synonymica. Archiv für Naturgeschichte 40 (1):41-77. (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); Bartholomay et al., 2019Bartholomay, P.R., K.A. Williams, V.M. Lopez & M.L. Oliveira 2019. Revision of the Traumatomutilla americana species group (Hymenoptera: Mutillidae). Zootaxa 4608 (1):1-34.:21 ( listed as synonym of Traumatomutilla quadrum (Klug, 1821)); 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.:84 ( listed as synonym of Traumatomutilla quadrum (Klug, 1821)).