Formica aquilonia × polyctena

– hybrids and backcrosses

Article 23.8 of ICZN regulates that a species-group name established for an animal later found to be a hybrid must not be used as the valid name for either of the parental species, even if it is older than all other available names for them. This excludes Formica major NYLANDER, 1849 and Formica constricta KARAVAJEV, 1926 to be considered as synonyms of Formica polyctena FOERSTER, 1850 or F. aquilonia YARROW, 1955 .