Formica densiventris

Distribution
This taxon was described from the United States.

Nomenclature

 *  densiventris. Formica fusca var. densiventris Viereck, 1903: 74 (w.) U.S.A. Cole, 1954a: 90 (m.). Junior synonym of subaenescens: Wheeler, W.M. 1913f: 504. Revived from synonymy as subspecies of fusca: Brown, 1947: 7. Raised to species: Creighton, 1950a: 499. Senior synonym of spicata: Cole, 1954a: 89; Cole, 1955b: 50; of rasilis: Mackay, Lowrie, et al. 1988: 114.
 * rasilis. Formica microgyna var. rasilis Wheeler, W.M. 1903e: 648 (w.q.m.) U.S.A. Subspecies of microgyna: Wheeler, W.M. 1913f: 468. Raised to species: Creighton, 1950a: 506. Junior synonym of densiventris: Mackay, Lowrie, et al. 1988: 114.
 * spicata. Formica rasilis subsp. spicata Creighton, 1950a: 507 (w.q.m.) U.S.A. [First available use of Formica microgyna subsp. rasilis var. spicata Wheeler, W.M. 1913f: 469; unavailable name.] Material of the unavailable name pinetorum referred here by Creighton, 1950a: 507. Junior synonym of densiventris: Cole, 1954a: 89; Cole, 1955b: 50.