• Lectotype designation: Seifert, 2021: 164.
• [Misspelled as congernes by Bernard, 1967a: 314.]
• Nylander, 1849: 30 (m.); Foerster, 1850a: 17 (q.)
• Status as species: Nylander, 1849: 29; Foerster, 1850a: 17; Schenck, 1852: 30; Mayr, 1855: 332 (redescription); Nylander, 1856b: 61; Smith, 1857b: 39; Gredler, 1858: 7; Smith, 1858b: 278; Smith, 1858a: 3; Mayr, 1861: 46 (in key); Mayr, 1863a: 413; Smith, 1871c: 1; Dours, 1873: 165; Saunders, 1880: 205; White, 1884: 250; Betrem, 1953: 323 (in key).
• Junior synonym of Formica pratensis: Roger, 1863b: 13; André, 1874c: 202 (in list); Forel, 1874: 98 (in list); Mayr, 1877a: 6; Emery & Forel, 1879: 450; Mayr, 1880: 26; Saunders, 1896: 20; Nasonov, 1889: 17; Lameere, 1892: 63; Dalla Torre, 1893: 204; Ruzsky, 1905b: 337; Wheeler, 1913i: 428; Forel, 1915d: 57 (in key); Donisthorpe, 1915f: 267; Emery, 1916a: 256; Soudek, 1922b: 80; Müller, 1923b: 142; Emery, 1925d: 255; Lomnicki, 1925a: 16 (in key); Betrem, 1926: 214; Donisthorpe, 1927c: 309; Lomnicki, 1928: 8; Karavaiev, 1936: 246; Gösswald, 1941: 82; Pisarski, 1975: 46.
• Senior synonym of Formica nigricans: Bernard, 1967a: 314.
• [Note: Bernard, 1967a: 314, gives Formica nigricans as senior synonym, but Formica congerens has priority.]
• Junior synonym of Formica lugubris: Yarrow, 1955a: 5; Dlussky, 1967a: 91; Dlussky & Pisarski, 1971: 180; Bolton, 1995b: 193; Radchenko, 2007: 36; Casevitz-Weulersse & Galkowski, 2009: 482; Radchenko, 2016: 287; Seifert, 2021: 164.

Citations

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