Strumigenys silvestrii is a tiny dacetine ant (Hymenoptera: Formicidae: Dacetini), apparently from South America, that has spread to the southern US and the West Indies. Strumigenys silvestrii has recently been found for the first time in the Old World, from the island of Madeira, mainland Portugal, and Macau. Here, we document new distributional records and the geographic spread of S. silvestrii. We compiled and mapped 67 site records of S. silvestrii. We documented the earliest known S. silvestrii records for 20 geographic areas (countries, major islands, and US states), including four areas for which we found no previously published records: Georgia (US), Grenada, Nevis, and St. Vincent. Strumigenys silvestrii is the only New World dacetine ant that has been recorded in the Old World. The distribution of its closest relatives and of known S. silvestrii specimen records supports the hypothesis that S. silvestrii is native to South America. Throughout its New World range (South America, the West Indies, and the southern US), many S. silvestrii records are from undisturbed forest habitats (usually indicative of a native species), but are very recent (usually indicative of a newly arrived exotic species).
BoieiroM., , EspadalerX., , AzedoA.R., , CollingwoodC., and SerranoA.R.M.. 2009. One genus and three ant species new to Portugal (Hymenoptera, Formicidae). Boletín de la Sociedad Entomológica Aragonesa45:515–517.
BoieiroM., EspadalerX., AzedoA.R., CollingwoodC. and SerranoA.R.M.. 2009. One genus and three ant species new to Portugal (Hymenoptera, Formicidae). Boletín de la Sociedad Entomológica Aragonesa 45:515–517.)| false
DeyrupM., , DavisL., and BucknerS., . 1998. Composition of the ant fauna of three Bahamian islands. In: WilsonT. K. (ed.). Proceedings of the 7th Symposium of Natural History of the Bahamas, pp. 23–31. Bahamian Field Station, San Salvador, Bahamas.
DeyrupM., DavisL. and BucknerS.. 1998. Composition of the ant fauna of three Bahamian islands. In: WilsonT. K. (ed.). Proceedings of the 7th Symposium of Natural History of the Bahamas, pp. 23–31. Bahamian Field Station, San Salvador, Bahamas.)| false
MacGownJ. A.HillJ. G. and SkvarlaM.. 2011.New records of ants (Hymenoptera: Formicidae) for Arkansas with a synopsis of previous records. Midsouth Entomologist 4:29–38. http://midsouthentomologist.org.msstate.edu/Volume4/Vol4_2_html_files/Vol4_2_001.html)| false