Lasius citrinus

This species exhibits temporary social parasitism. Queens found new colonies by infiltrating an established nest of (indirect evidence) or possibly  (unconfirmed) (de la Mora et al., 2021; Janda et al., 2004; Seifert, 2018), killing the queen and using host workers to care for her initial brood.

Distribution based on Regional Taxon Lists
Palaearctic Region: Austria, Azerbaijan, 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.

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