7 species
Taxonomic history
| Formicoxenus in Myrmicinae: Mayr, 1855 PDF: 413 [Myrmicidae]; Dalla Torre, 1893: 62. |
| Formicoxenus in Myrmicinae, Myrmicini: Emery, 1895l PDF: 769; Wheeler, 1910a PDF: 139. |
| Formicoxenus in Myrmicinae, Stenammini: Ashmead, 1905c PDF: 383. |
| Formicoxenus in Myrmicinae, Leptothoracini: Emery, 1914e: 42; Forel, 1917 PDF: 245; Wheeler, 1922: 664; Emery, 1924f PDF: 264; all subsequent authors except the following. |
| Formicoxenus in Myrmicinae, Formicoxenini: Forel, 1893b PDF: 165; Bolton, 1994: 105. |
| Formicoxenus as junior synonym of Stenamma: Mayr, 1863a PDF: 422; Roger, 1863b PDF: 25; Emery & Forel, 1879a: 457. |
| Formicoxenus as junior synonym of Leptothorax: Brown, 1973b: 180 [provisional]. |
| Formicoxenus as genus: Emery, in André, 1882c: 273; all subsequent authors except the above; Francoeur, Loiselle & Buschinger, 1985 PDF: 343. |
Formicoxenus chamberlini
Formicoxenus diversipilosus
Formicoxenus hirticornis
Formicoxenus nitidulus
Formicoxenus provancheri
Formicoxenus quebecensis