Forelius lilloi is a species of ant in the genus Forelius. Described by Cuezzo in 2000, the species is endemic to Argentina.Cuezzo, F. 2000. Revisión del género Forelius (Hymenoptera: Formicidae: Dolichoderinae). Sociobiology 35: 197-275 (page 248, figs. 18, 34 worker described)

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