| #308841 | Lectotype designation: Wilson, 1955a: 86. | 
| #257118 | Combination in Lasius: Emery, 1869b: 25 (in text); Emery, 1870: 194. | 
| #293058 | Combination in Donisthorpea: Donisthorpe, 1915f: 347. | 
| #286094 | Combination in Formicina (Donisthorpea): Emery, 1916a: 241. | 
| #293059 | Combination in Formicina: Bondroit, 1918: 27. | 
| #286093 | Combination in Acanthomyops: Kuznetsov-Ugamsky, 1927e: 189. | 
| #293060 | Combination in Acanthomyops (Donisthorpea): Donisthorpe, 1927c: 400. | 
| #286092 | Combination in Lasius: Müller, 1923b: 126; Kuznetsov-Ugamsky, 1929b: 38. | 
| #293061 | Combination in Lasius (Lasius): Forel, 1915d: 53; Seifert, 2020a: 16. | 
| #293062 | As unavailable (infrasubspecific) name: Forel, 1904c: 386; Ruzsky, 1905b: 310. | 
| #293063 | Junior synonym of Lasius fumatus: Emery & Forel, 1879: 452. | 
| #293064 | [Note: the reference Emery & Forel, 1879: 452, reverses the seniority of Lasius lasioides established by Emery, 1870: 194, but does not affect the synonymy and is discounted here.] | 
| #257121 | Junior synonym of Lasius alienus: Wilson, 1955a: 77; Smith, 1979: 1435; Agosti & Collingwood, 1987a: 58; Arakelian, 1994: 117. | 
| #257119 | Subspecies of Lasius alienus: Dalla Torre, 1893: 182; Cagniant, 1964: 92; Forel, 1915d: 53 (in key); Emery, 1916a: 241; Menozzi, 1925d: 34; Zimmermann, 1935: 49; Finzi, 1936: 191. | 
| #288891 | Subspecies of Lasius niger: Forel, 1911f: 352; Forel, 1913d: 434; Forel, 1915d: 53 (in key); Donisthorpe, 1915f: 347; Emery, 1916a: 241; Santschi, 1921e: 170; Kulmatycki, 1922: 81; Finzi, 1923a: 4; Emery, 1925d: 230; Schkaff, 1925b: 275; Soudek, 1925b: 15; Donisthorpe, 1927c: 400; Kuznetsov-Ugamsky, 1927e: 189; Kuznetsov-Ugamsky, 1929b: 37; Finzi, 1936: 191; Bernard, 1945b: 137. | 
| #257120 | Status as species: Emery, 1870: 194; Bondroit, 1918: 27; Stärcke, 1926a: 124 (in key); Stärcke, 1944b: 155; Consani & Zangheri, 1952: 44; Seifert, 1992b: 8 (redescription); Bolton, 1995b: 223; Mei, 1995: 768; Poldi et al., 1995: 7; Schembri & Collingwood, 1995: 156; Bračko, 2006: 149; Cagniant, 2006: 194; Gratiashvili & Barjadze, 2008: 136; Paknia et al., 2008: 154; Casevitz-Weulersse & Galkowski, 2009: 484; Vonshak & Ionescu-Hirsch, 2010: 40; Karaman, 2011b: 85; Legakis, 2011: 27; Borowiec & Salata, 2012: 501; Kiran & Karaman, 2012: 12; Borowiec & Salata, 2013: 357; Borowiec, 2014: 87; Bračko et al., 2014: 20; Lebas et al., 2016: 218; Borowiec & Salata, 2018a: 6; Salata & Borowiec, 2018b: 157 (in key); Salata & Borowiec, 2018c: 46; Seifert, 2020a: 49; Arcos et al., 2022: 11; Borowiec & Salata, 2022: 198 (redescription); Bračko, 2023: 155. | 
| #287017 | Senior synonym of Lasius alienus barbarus: Seifert, 1992b: 8; Bolton, 1995b: 223; Seifert, 2020a: 49. | 
| #257124 | Senior synonym of Lasius fumatus: Emery, 1870: 194; Dalla Torre, 1893: 182; Forel, 1915d: 53; Emery, 1925d: 230; Smith, 1979: 1435; Seifert, 1992b: 8; Bolton, 1995b: 223. | 
| #287018
(selected) | Senior synonym of Lasius fuscula: Dalla Torre, 1893: 182; Forel, 1915d: 53; Emery, 1916a: 241; Emery, 1925d: 230; Smith, 1979: 1435; Bolton, 1995b: 223; Seifert, 2020a: 49. | 
| #287016 | Senior synonym of Lasius brunneus nigrobrunneus: Seifert, 2020a: 49. |