Lasius citrinus

This species exhibits temporary social parasitism. Queens found new colonies by infiltrating an established nest of Lasius brunneus or possibly Lasius niger, killing the queen and using host workers to care for her initial brood.

Distribution based on Regional Taxon Lists
Palaearctic Region: Austria, Belarus, Belgium, Bulgaria, Czech Republic, Democratic Peoples Republic of Korea, Georgia, Greece, Hungary, Iberian Peninsula, Italy, Netherlands, Norway, Poland, Russian Federation, Slovakia, Slovenia, Spain, Switzerland.

Nomenclature

 * affinis. Formica affinis Schenck, 1852: 62 (w.q.m.) GERMANY. [Junior primary homonym of Formica affinis Leach, 1825: 290.] Replacement name: citrinus Emery, 1922b: 12, oldest synonym and hence first available replacement name: Seifert, 1990: 7. Combination in Lasius: Mayr, 1861: 50; in Formicina: Emery, 1916b: 242; in Acanthomyops: Ruzsky, 1925b: 45; in Lasius (Chthonolasius): Ruzsky, 1914a: 61; Emery, 1925b: 233. Junior synonym of bicornis: Smith, F. 1858b: 8. Revived from synonymy: Mayr, 1863; 425. Subspecies of umbratus: Forel, 1874: 47; Mayr, 1886d: 430; Emery, 1925b: 233; Karavaiev, 1936: 214; of bicornis: André, 1882b: 196; Nasonov, 1889: 24; Forel, 1915d: 52; Emery, 1916b: 242. Status as species: Ruzsky, 1902d: 15; Bondroit, 1912: 352; Emery, 1914d: 159; Bondroit, 1918: 31; Stärcke, 1937: 40; Stitz, 1939: 299; Novak & Sadil, 1941: 103. Junior synonym of umbratus: Wilson, 1955a: 150. Revived from synonymy: Collingwood, 1963: 145. Status as species: Collingwood & Yarrow, 1969: 80; Baroni Urbani, 1971c: 209; Kutter, 1977c: 232; Collingwood, 1979: 102; Seifert, 1988: 163; Atanassov & Dlussky, 1992: 248.
 *  citrinus. Lasius bicornis var. citrina Emery, 1922b: 12 (w.) ITALY. Combination in L. (Chthonolasius): Emery, 1925b: 232. Junior synonym of umbratus: Wilson, 1955a: 151; of affinis Schenck, and hence first available replacement name for Formica affinis Schenck, 1852: 62 [Junior primary homonym of Formica affinis Leach, 1825: 290.] and raised to species: Seifert, 1990: 7.