Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Genus Linepithema

Linepithema humile  - Argentine Ant - Linepithema humile antz2 - Linepithema humile Argentine Ant for California in June - Linepithema humile Linepithema humile ?? - Linepithema humile unknown wasp - Linepithema humile - male Is this an Argentine ant? - Linepithema humile ant rafts in intdoor aquarium - Linepithema humile Reality Check: Is this an Argentine ant tasting cochineal? Yes - Linepithema humile
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Bees, Ants, and other Stinging Wasps)
Superfamily Vespoidea (Ants, Stinging Wasps, and Hornets)
Family Formicidae (Ants)
Subfamily Dolichoderinae (Odorous Ants)
Genus Linepithema
Explanation of Names
Greek linon (λινον)- "flax" + epithema (επιθημα)- "covering"
Numbers
2 species in North America [L. humile; L. iniquum] (nearctica.com- endings corrected)
Size
workers (of L. humile) 2.2-2.6 mm
Identification
single abdominal pedicel (the petiole); 12-segmented antenna without club; distinct promesonotal suture; strong constriction between the mesonotum and propodeum; lack a sting or acidopore, but have a transverse slit-shaped cloacal opening; soft flexible integument
[description adapted from Mississippi State U. - see Internet References below]
Range
mostly neotropical; one accidentally introduced species (L. humile, the Argentine Ant) has spread across southern United States (from North Carolina to Florida, west through the gulf states to the coast of California)
Internet References
live adult images of Linepithema species (Alex Wild, myrmecos.net)
preserved adult images of L. humile at high magnification (Mississippi State U.)