Taxonomic history
Smith, 1939c PDF: 176 (q. ergatoid); Snelling, 1965a PDF: 18 (q.m. ergatoid).Combination in Leptothorax (Mychothorax): Emery, 1924f PDF: 262.Combination in Mychothorax: Ruzsky, 1936 PDF: 96.Combination in Formicoxenus: Buschinger, 1979a PDF: 61.Senior synonym of Formicoxenus hirticornis formidolosus: Smith, 1939c PDF: 177.See also: Wheeler, 1903d PDF: 224; Francoeur et al., 1985 PDF: 382.