Linepithema humile

Distribution
This taxon was described from Argentina. It is also found in Namibia, Lesotho,.

Europe
This species was introduced into Europe from South America and has become an established and notorious pest in the Mediterranean area, developing very populous multi-queened colonies along the coast. It is sometimes brought into North Europe with plant materials and occasionally colonises heated premises. It does not appear to be able to establish outside in northern latitudes but is present and said to be increasing in the Channel Islands. (Collingwood 1979)

Nomenclature

 *  humile. Hypoclinea humilis Mayr, 1868b: 164 (w.) ARGENTINA. Forel, 1908c: 395 (m.); Newell, 1908: 28 (q.); Wheeler, G.C. & Wheeler, J. 1951: 186 (l.); Crozier, 1969: 250 (k.). Combination in H. (Iridomyrmex): Mayr, 1870b: 959; in Iridomyrmex: Emery, 1888d: 386; in Linepithema: Shattuck, 1992a: 16. Senior synonym of arrogans, riograndensis: Wild, 2004: 1207. See also: Gallardo, 1916a: 97; Bernard, 1967: 251; Collingwood, 1979: 33; Smith, D.R. 1979: 1418; Ward, 1987: 1; Wheeler, G.C. & Wheeler, J. 1990a: 465; Shattuck, 1994: 123; Wild, 2007a: 61; Solis, Fox, Rossi & Bueno, 2010: 19.
 * arrogans. Iridomyrmex humilis var. arrogans Chopard, 1921: 237 (footnote),:241, figs. 1-31 (w.q.m.l.) FRANCE. [Also described as new by Santschi, 1929d: 306 (in key).] Combination in Linepithema: Shattuck, 1992a: 16. Junior synonym of humile: Bernard, 1967: 251. Revived from synonymy as subspecies of humile: Shattuck, 1992a: 16. Junior synonym of humile: Wild, 2004: 1207.
 * riograndensis. Iridomyrmex riograndensis Borgmeier, 1928b: 64 (w.) BRAZIL. Combination in Linepithema: Shattuck, 1992a: 16. Junior synonym of humile: Wild, 2004: 1207.

Additional References

 * Abril, S., Diaz, M., Enriquez, M.L. & Gomez, C. 2013. More and bigger queens: a clue to the invasive success of the Argentine ant (Hymenoptera: Formicidae) in natural habitats. Myrmecological News 18, 19-24.
 * Lester,P.J., Baring,C.W., Longson,C.G. & Hartley,S. 2003. Argentine and other ants (Hymenoptera: Formicidae) in New Zealand horticultural ecosystems: distribution, hemipteran hosts, and review. New Zealand Entomologist 26: 79-89.