• Protomognathus in Myrmicinae, Leptothoracini: Donisthorpe, 1943g: 688.
• Protomognathus in Myrmicinae, Formicoxenini: Bolton, 1994: 105; Bolton, 1995b: 44; Bolton, 2003: 70, 251.
• Protomognathus as junior synonym of Harpagoxenus: Emery, 1924f: 265; Donisthorpe, 1943g: 688; Smith, 1979: 1398.
• Protomognathus as genus: Cover, 1990: 65; Bolton, 1995b: 44, 369; Bolton, 2003: 70, 251.
• Protomognathus as junior synonym of Temnothorax: Ward et al., 2015: 75.
• [Note: some authors would prefer to retain Protomognathus as a paraphyletic genus: Seifert et al., 2016: 237. The compiler of this catalogue emphatically supports monophyly, in agreement with Ward et al., 2016: 489.]

Obsolete classifications

• Tomognathus (Protomognathus)

Citations

• Bolton, B. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp.
• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Bolton, B. 2003. Synopsis and classification of Formicidae. Memoirs of the American Entomological Institute 71:1-370. PDF
• Cover, S. P. 1990. [Untitled. Keys to the ant genera of the Nearctic and Neotropical regions. Based on the worker caste.]. Pp. 62-81 in: Hölldobler, B.; Wilson, E. O. 1990. The ants. Cambridge, Mass.: Harvard University Press, xii + 732 pp.
• Donisthorpe, H. 1943g. A list of the type-species of the genera and subgenera of the Formicidae. [part]. Annals and Magazine of Natural History (11)10:617-688.
• Emery, C. 1924f ("1922"). Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C:207-397. PDF
• Seifert, B.; Buschinger, A.; Aldawood, A.; Antonova, V.; Bharti, H.; Borowiec, L.; Dekoninck, W.; Dubovikoff, D.; Espadaler, X.; Flegr, J.; Georgiadis, C.; Heinze, J.; Neumeyer, R.; Ødegaard, F.; Oettler, J.; Radchenko, A.; Schultz, R.; Sharaf, M.; Trager, J.; Vesnić, A.; Wiezik, M.; Zettel, H. 2016. Banning paraphylies and executing Linnaean taxonomy is discordant and reduces the evolutionary and semantic information content of biological nomenclature. Insectes Sociaux 63:237-242. 10.1007/s00040-016-0467-1 PDF
• Smith, D. R. 1979. Superfamily Formicoidea. Pp. 1323-1467 in: Krombein, K. V.; Hurd, P. D.; Smith, D. R.; Burks, B. D. (eds.) 1979. Catalog of Hymenoptera in America north of Mexico. Volume 2. Apocrita (Aculeata). Washington, D.C.: Smithsonian Institution Press, pp. i-xvi, 1199-2209.
• Ward, P. S.; Brady, S. G.; Fisher, B. L.; Schultz, T. R. 2015. The evolution of myrmicine ants: phylogeny and biogeography of a hyperdiverse ant clade (Hymenoptera: Formicidae). Systematic Entomology 40:61-81. 10.1111/syen.12090 PDF
• Ward, P. S.; Brady, S. G.; Fisher, B. L.; Schultz, T. R. 2016. Phylogenetic classifications are informative, stable, and pragmatic: the case for monophyletic taxa. Insectes Sociaux 63:489-492. 10.1007/s00040-016-0516-9 PDF
• Wheeler, W. M. 1905a. An interpretation of the slave-making instincts in ants. Bulletin of the American Museum of Natural History 21:1-16. PDF