• Lectotype designation: Longino, 2009: 85.
• Combination in Atta: Mayr, 1863a: 397.
• Combination in Aphaenogaster: Roger, 1863b: 30.
• Combination in Pheidole: Emery, 1915k: 69.
• Status as species: Roger, 1862c: 290; Roger, 1863b: 30; Mayr, 1863a: 397; Dalla Torre, 1893: 108; Forel, 1895b: 129; Emery, 1922c: 110; Kempf, 1972b: 204; Bolton, 1995b: 332; Longino, 2009: 85; Branstetter & Sáenz, 2012: 260; Bezděčková et al., 2015: 121; Longino, 2019: 126; Serna et al., 2019: 1042 (redescription).
• Senior synonym of Pheidole opaca apterostigmoides: Longino, 2009: 86.
• Senior synonym of Pheidole cephalica: Longino, 2009: 85.
• Senior synonym of Pheidole opaca incrustata: Longino, 2009: 86.
• Senior synonym of Pheidole opaca: Longino, 2009: 85.
• Senior synonym of Pheidole opaca sarrita: Longino, 2009: 86.
• [Note: this taxon is omitted from Wilson, 2003a.]

Junior synonyms

• Pheidole cephalica Smith, 1858
• Pheidole opaca Mayr, 1862
• Pheidole opaca apterostigmoides Weber, 1943
• Pheidole opaca incrustata Forel, 1908
• Pheidole opaca sarrita Forel, 1908

Obsolete combinations

• Formica vorax

Citations

• Bezděčková, K.; Bezděčka, P.; Machar, I. 2015. A checklist of the ants of Peru. Zootaxa 4020:101-133. PDF
• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Branstetter, M. G.; Sáenz, L. 2012. Las hormigas (Hymenoptera: Formicidae) de Guatemala. Pp. 221-268 in: Cano, E. B.; Schuster, J. C. (eds.) 2012. Biodiversidad de Guatemala. Volumen 2. Guatemala: Universidad del Valle de Guatemala, iv + 328 pp. PDF
• Dalla Torre, K. W. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. PDF
• Emery, C. 1915k. Definizione del genere Aphaenogaster e partizione di esso in sottogeneri. Parapheidole e Novomessor nn. gg. Rendiconti delle Sessioni della Reale Accademia delle Scienze dell'Istituto di Bologna. Classe di Scienze Fisiche (n.s.)19:67-75. PDF
• Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B:95-206. PDF
• Fabricius, J. C. 1804. Systema Piezatorum secundum ordines, genera, species, adiectis synonymis, locis, observationibus, descriptionibus. Brunswick: C. Reichard, xiv + 15-439 + 30 pp. PDF
• Forel, A. 1895b. A fauna das formigas do Brazil. Boletim do Museu Paraense de Historia Natural e Ethnographia 1:89-139. PDF
• Kempf, W. W. 1972b. Catálogo abreviado das formigas da região Neotropical. Studia Entomologica 15:3-344. PDF
• Longino, J. T. 2009. Additions to the taxonomy of New World Pheidole (Hymenoptera: Formicidae). Zootaxa 2181:1-90. PDF
• Longino, J. T. 2019. Pheidole (Hymenoptera, Formicidae) of Middle American wet forest. Zootaxa 4599:1-126. doi.org/10.11646/zootaxa.4599.1.1 PDF
• Mayr, G. 1863a. Formicidarum index synonymicus. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 13:385-460. PDF
• Roger, J. 1862c. Synonymische Bemerkungen. 1. Ueber Formiciden. Berliner Entomologische Zeitschrift 6:283-297. PDF
• Roger, J. 1863b. Verzeichniss der Formiciden-Gattungen und Arten. Berliner Entomologische Zeitschrift 7(Beilage):1-65. PDF
• Serna, F. J.; Suárez, D.; Pérez, A.L. 2019. Género Pheidole. Capítulo 30. Pp. 917-1053 in: Fernández, F.; Guerrero, R. J.; Delsinne, T. (eds.) 2019d. Hormigas de Colombia. Bogotá: Universidad Nacional de Colombia, 1198 pp. PDF
• Wilson, E. O. 2003a. Pheidole in the New World. A dominant, hyperdiverse ant genus. Cambridge, Mass.: Harvard University Press, [ix] + 794 pp.
• Zimsen, E. 1964. The type material of I. C. Fabricius. Copenhagen: Munksgaard, 656 pp. PDF