Plagiolepis alluaudi

Plagiolepis alluaudi is a tiny Old World ant that has spread to many parts of the world through human commerce. It is a primarily tropical species, apparently native to Madagascar and neighboring islands. It has become a pest on Pacific islands and in European greenhouses (Wetterer, 2013).

Distribution based on Regional Taxon Lists
Afrotropical Region: Comoros, Kenya, Saint Helena. Australasian Region: New Caledonia, Norfolk Island. Indo-Australian Region: Borneo, Cook Islands, Fiji, French Polynesia, Hawaii, Niue, Solomon Islands, Tonga, Vanuatu. Malagasy Region: Madagascar, Mayotte, Réunion, Seychelles. Nearctic Region: United States. Neotropical Region: Barbados, Bermuda. Palaearctic Region: China, Japan, Switzerland.

Nomenclature

 *  alluaudi. Plagiolepis alluaudi Emery, 1894a: 71 (w.) SEYCHELLES IS. Forel, 1907a: 30 (q.). Senior synonym of augusti, foreli, mactavishi, ornata: Smith, M.R. 1958b: 196. See also: Smith, D.R. 1979: 1423.
 * mactavishi. Plagiolepis mactavishi Wheeler, W.M. 1908c: 166 (w.) FRENCH POLYNESIA (Society Is). Wheeler, W.M. 1922f: 318 (q.); Santschi, 1928b: 37 (m.). Junior synonym of alluaudi: Smith, M.R. 1958b: 196.
 * foreli. Plagiolepis foreli Santschi, 1920g: 165, fig. 1 (w.) SWITZERLAND. Subspecies of alluaudi: Emery, 1921d: 318. Junior synonym of alluaudi: Smith, M.R. 1958b: 196.
 * ornata. Plagiolepis foreli var. ornata Santschi, 1920g: 166 (w.) NEW CALEDONIA. Subspecies of alluaudi: Emery, 1921d: 318. Junior synonym of alluaudi: Smith, M.R. 1958b: 196.
 * augusti. Plagiolepis augusti Emery, 1921d: 317. Replacement name for foreli Mann, 1921: 473. [Junior primary homonym of foreli Santschi, 1920g: 165.] Junior synonym of alluaudi: Smith, M.R. 1958b: 196.
 * foreli. Plagiolepis foreli Mann, 1921: 473 (w.) FIJI IS. [Junior primary homonym of foreli Santschi, above.] Replacement name: augusti Emery, 1921d: 317.

Additional References

 * Wetterer, J.K. 2013. Worldwide spread of Alluaud's little yellow ant, Plagiolepis alluaudi (Hymenoptera: Formicidae). Myrmecological News 19, 53-59.