Liometopum occidentale

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Liometopum occidentale
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Liometopum
Species: L. occidentale
Binomial name
Liometopum occidentale
Emery, 1895

Liometopum occidentale casent0005328 profile 1.jpg

Liometopum occidentale casent0005328 dorsal 1.jpg

Specimen labels


Worker: This is a common bicolored species, having a dark brown head and gaster with a lighter colored mesosoma, usually golden yellow, but some may be light brown. The antennal scapes are short (1.02 mm) and surpass the posterior margin of the head by less than twice the maximum thickness of the scape. The scape has few short, decumbent hairs (no more than 20). The longest erect hairs are on the dorsal surface of the pronotum (0.26 mm in length). The mesosoma is convex with the highest point at the mesonotum.

Keys including this Species


Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).
Neotropical Region: Mexico.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb





The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • occidentale. Liometopum microcephalum var. occidentale Emery, 1895c: 330 (w.m.) U.S.A.
    • Wheeler, W.M. 1917a: 522 (q.).
    • Subspecies of apiculatum: Wheeler, W.M. 1905e: 324; Emery, 1913a: 20.
    • Status as species: Wheeler, W.M. 1917a: 521; Creighton, 1950a: 339; Smith, D.R. 1979: 1417; Allred, 1982: 486; Shattuck, 1994: 130; Bolton, 1995b: 247; Del Toro, et al. 2009: 330 (redescription).



  • Emery, C. 1895d. Beiträge zur Kenntniss der nordamerikanischen Ameisenfauna. (Schluss). Zool. Jahrb. Abt. Syst. Geogr. Biol. Tiere 8: 257-360 (page 330, worker, male described)
  • Wheeler, W. M. 1905h. The North American ants of the genus Liometopum. Bull. Am. Mus. Nat. Hist. 21: 321-333 (page 324, Variety of apiculatum)
  • Wheeler, W. M. 1917a. The mountain ants of western North America. Proc. Am. Acad. Arts Sci. 52: 457-569 (page 522, queen described)
  • Wheeler, W. M. 1917a. The mountain ants of western North America. Proc. Am. Acad. Arts Sci. 52: 457-569 (page 521, Raised to species)