Formica accreta

AntWiki: The Ants --- Online
Jump to navigation Jump to search
Formica accreta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Formicini
Genus: Formica
Species: F. accreta
Binomial name
Formica accreta
Francoeur, 1973

Formica accreta casent0005358 profile 1.jpg

Formica accreta casent0005358 dorsal 1.jpg

Specimen labels

At a Glance • Polygynous  



This is a black species with the metasternal process poorly developed. The gena is without coarse punctures, although poorly defined, elongate punctures are located just anterior to the eyes. The scapes are usually longer than the head length. The anterior border of the clypeus is angulate, the eyes are large (maximum diameter 0.43 - 0.54 mm). The ventral surface of the head, posterior border, dorsum of the mesosoma and dorsum of the petiole are without erect hairs. The first gastral tergite has only 3 or 4 short (> 0.1 mm), blunt hairs. The dorsal surfaces of the head and mesosoma are weakly shining. (Mackay and Mackay 2002)

Keys including this Species


Western Canada south to California, east to Montana, south to New Mexico.

Latitudinal Distribution Pattern

Latitudinal Range: 65.508566° to 31.592321°.

Tropical South

Distribution based on Regional Taxon Lists

Nearctic Region: Canada (type locality), United States.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.


Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.



Association with Other Organisms

  • This species is a host for the ant Polyergus mexicanus (a slave maker) (Trager, 2013; de la Mora et al., 2021) (properly Polyergus umbratus).
  • This species is a prey for the Microdon fly Microdon albicomatus (a predator) (Quevillon, 2018).
  • This species is a prey for the Microdon fly Microdon cothurnatus (a predator) (Quevillon, 2018).
  • This species is a prey for the Microdon fly Microdon piperi (a predator) (Quevillon, 2018).

Life History Traits

  • Queen number: polygynous (Frumhoff & Ward, 1992)



The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • accreta. Formica accreta Francoeur, 1973: 182, figs. 308-323 (w.q.m.) CANADA. Junior synonym of fusca: Wheeler, G.C. & Wheeler, J. 1986g: 16. Revived from synonymy: Bolton, 1995b: 190.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.


Francoeur 1973. Figures 308-323.

Worker Morphology


References based on Global Ant Biodiversity Informatics

  • Allred D. M. 1982. Ants of Utah. The Great Basin Naturalist 42: 415-511.
  • Allred, D.M. 1982. The ants of Utah. Great Basin Naturalist 42:415-511.
  • Blacker, N.C. 1992. Some Ants from Southern Vancouver Island, British Columbia. J. Entomol. Soc. Bri. Columbia 89:3-12.
  • Blacker, N.C. 1992. Some ants (Hymenoptera: Formicidae) from Southern Vancouver Island, British Columbia. Journal of the Entomological Society of British Columbia 89:3-12
  • Francoeur. A. 1973. Revision taxonomique des especes nearctiques du group fusca, genre Formica. Memoires de la Societe Entomologique du Quebec 3: 1-316.
  • Glasier J. R. N., S. E. Nielsen, J. Acorn, and J. Pinzon. 2019. Boreal sand hills are areas of high diversity for Boreal ants (Hymenoptera: Formicidae). Diversity 11, 22; doi:10.3390/d11020022.
  • Higgins R. J., and B. S. Lindgren. 2006. The fine scale physical attributes of coarse woody debris and effects of surrounding stand structure on its utilization by ants (Hymenoptera: Formicidae) in British Columbia, Canada. Gen. Tech. Rep. SRS-93. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station pp. 67-73.
  • Longino, J.T. 2010. Personal Communication. Longino Collection Database
  • Mackay W. P., and E. E. Mackay. 2002. The ants of New Mexico (Hymenoptera: Formicidae). Lewiston, New York: Edwin Mellen Press, 400 pp.
  • Mackay, W.P. and E. Mackay. XXXX. The Ants of New Mexico
  • Parson G. L., G Cassis, A. R. Moldenke, J. D. Lattin, N. H. Anderson, J. C. Miller, P. Hammond, T. Schowalter. 1991. Invertebrates of the H.J. Andrews Experimental Forest, western Cascade Range, Oregon. V: An annotated list of insects and other arthropods. Gen. Tech. Rep. PNW-GTR-290. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 168 p.
  • Ratchford, J.S., S.E. Wittman, E.S. Jules, A.M. Ellison, N.J. Gotelli and N.J. Sanders. 2005. The effects of fire, local environment and time on ant assemblages in fens and forests. Diversity and Distributions 11:487-497.