• Combination in Acanthomyops: Ruzsky, 1925b: 44.
• Combination in Lasius (Chthonolasius): Ruzsky, 1914a: 61; Emery, 1925d: 234.
• Subspecies of Lasius umbratus: Ruzsky, 1905b: 287
• Raised to species: Ruzsky, 1925b: 44
• Subspecies of Lasius bicornis: Menozzi, 1939a: 314 (in key)
• Junior synonym of Lasius umbratus: Wilson, 1955a: 150

Obsolete combinations

• Lasius umbratus exacutus

Citations

• Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183:1-302. PDF
• Menozzi, C. 1939a. Formiche dell'Himalaya e del Karakorum raccolte dalla Spedizione italiana comandata da S. A. R. il Duca di Spoleto (1929). Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 78:285-345. PDF
• Ruzsky, M. 1902d. Material on the ant fauna of the Caucasus and the Crimea. [In Russian.]. Protokoly Obshchestva Estestvoispytatelei pri Imperatorskom Kazanskom Universitete 206(suppl.):1-33. PDF
• Ruzsky, M. 1905b. The ants of Russia. (Formicariae Imperii Rossici). Systematics, geography and data on the biology of Russian ants. Part I. [In Russian.]. Trudy Obshchestva Estestvoispytatelei pri Imperatorskom Kazanskom Universitete 38(4-6):1-800.
• Ruzsky, M. 1914a ("1913"). Myrmekologische Notizen. Archiv für Naturgeschichte (A)79(9):58-63. PDF
• Ruzsky, M. 1925b. New data on the ant fauna of Siberia. [In Russian.]. Russkoe Entomologicheskoe Obozrenie 19:41-46. PDF
• Wilson, E. O. 1955a. A monographic revision of the ant genus Lasius. Bulletin of the Museum of Comparative Zoology 113:1-201. PDF