Formica aserva

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

Nomenclature

 *  aserva. Formica sanguinea r. aserva Forel, 1901g: 395 (w.q.) CANADA. Wheeler, W.M. 1913f: 405 (m.). Combination in F. (Raptiformica): Emery, 1925b: 260. Synonym of subnuda: Creighton, 1950a: 469; Wilson & Brown, 1955: 118; Buren, 1968a: 33. [All these authors give subnuda as the senior name but the date of availability of subnuda makes it clear that aserva has seniority: Bolton, 1995b: 191; see also under subnuda.]
 * subnuda. Formica sanguinea subsp. subnuda Wheeler, W.M. 1910g: 570 (w.) CANADA. [First available use of Formica sanguinea subsp. rubicunda var. subnuda Emery, 1895c: 335; unavailable name.] Wheeler, W.M. 1913f: 409 (q.m.); Wheeler, G.C. & Wheeler, J. 1953c: 170 (l). Combination in F. (Raptiformica): Emery, 1925b: 260. Subspecies of sanguinea: Wheeler, W.M. 1913f: 469; Wheeler, W.M. 1917a: 533. Raised to species: Creighton, 1950a: 469. Synonym of aserva: Creighton, 1950a: 469; Wilson & Brown, 1955: 118; Buren, 1968a: 33. [Creighton, Wilson & Brown, and Buren incorrectly make subnuda the senior name but aserva has priority and is therefore the valid name of this taxon: Bolton, 1995b: 204.]