Leptothorax muscorum

Distribution
This taxon was described from Finland. It is also found in the United States.

Biology
Colonies of this species are found in dead Beargrass stems in Montana.

Nomenclature

 *  muscorum. Myrmica muscorum Nylander, 1846b: 1054 (w.q.m.) FINLAND. Combination in Leptothorax: Mayr, 1855: 439; in L. (Mychothorax): Forel, 1915d: 26. Subspecies of acervorum: Forel, 1874: 84. Status as species: André, 1883a: 294; Ruzsky, 1905b: 616. Senior synonym of canadensis, kincaidi, septentrionalis, yankee (and its junior synonyms obscurus, sordidus): Brown, 1955a: 47; of betulae, fagi, flavescens: Radchenko, 1995a: 25. Current subspecies: nominal plus uvicensis. See also: Buschinger, 1966b: 165; Baroni Urbani, 1971c: 99; Kutter, 1977c: 130; Collingwood, 1979: 72; Smith, D.R. 1979: 1397; Loiselle, Francoeur, et al. 1990: 323; Kupyanskaya, 1990: 139; Atanassov & Dlussky, 1992: 132; Radchenko, 2007: 31.
 * flavescens. Leptothorax muscorum var. flavescens Ruzsky, 1896: 72 (w.) RUSSIA. [First available use of Leptothorax acervorum subsp. muscorum var. flavescens Ruzsky, 1895: 26; unavailable name.] Subspecies of muscorum: Ruzsky, 1905b: 621. Junior synonym of muscorum: Radchenko, 1995a: 25.
 * canadensis. Leptothorax canadensis Provancher, 1887: 245 (w.q.m.) CANADA. Wheeler, G.C. & Wheeler, J. 1955b: 21 (l.). Combination in L. (Mychothorax): Emery, 1924d: 261; in L. (Leptothorax): Wheeler, G.C. & Wheeler, J. 1955b: 21. Subspecies of acervorum: André, 1887: 295; Wheeler, W.M. 1903c: 225. Status as species: Emery, 1895c: 318; Creighton, 1950a: 274. Material of the unavailable name convivialis referred here by Creighton, 1950a: 276. Junior synonym of muscorum: Brown, 1955a: 47.
 * obscurus. Leptothorax canadensis subsp. obscurus Viereck, 1903: 72 (w.) U.S.A. Junior synonym of yankee: Creighton, 1950a: 277.
 * yankee. Leptothorax (Leptothorax) canadensis var. yankee Emery, 1895c: 319 (w.q.) U.S.A. Wheeler, W.M. 1917a: 513 (m.); Wheeler, G.C. & Wheeler, J. 1955b: 21 (l.). Subspecies of canadensis and senior synonym of obscurus, sordidus: Creighton, 1950a: 277. Junior synonym of muscorum: Brown, 1955a: 47.
 * betulae. Leptothorax muscorum var. betulae Ruzsky, 1916: 6 (w.) RUSSIA. Subspecies of muscorum: Ruzsky, 1936: 94. Junior synonym of muscorum: Radchenko, 1995a: 25.
 * fagi. Leptothorax (Mychothorax) muscorum var. fagi Ruzsky, 1905b: 619, fig. 151 (w.) CAUCASUS. Junior synonym of muscorum: Radchenko, 1995a: 25.
 * septentrionalis. Leptothorax (Mychothorax) muscorum var. septentrionalis Wheeler, W.M. 1917a: 511 (w.q.m.) CANADA. Material of the unavailable name calderoni referred here by Creighton, 1950a: 276. Junior synonym of muscorum: Brown, 1955a: 47.
 * sordidus. Leptothorax muscorum var. sordidus Wheeler, W.M. 1903c: 224, pl. 12, fig. 2 (w.) U.S.A. Junior synonym of yankee: Creighton, 1950a: 277.
 * kincaidi. Leptothorax yankee var. kincaidi Pergande, 1900: 520 (w.q.) U.S.A. Junior synonym of muscorum: Brown, 1955a: 47.

Additional References

 * [[Media:Brown 1955a.pdf|Brown, W. L., Jr. 1955a. The ant Leptothorax muscorum (Nylander) in North America. Entomol. News 66: 43-50 PDF]]