Arucillus is a genus of harvestmen in the family Cosmetidae with two described species (as of early 2025). All species are from Central America or South America.
An overview of the wider phylogeny was stated by Medrano et al. (2024) favoring a placement in Metergininae but acknowledging that "Arucillus" appeared among Libitiinae in all other analyses, in some cases appearing allied to some externally similar species from Mexico and Antilles, those currently in the genera "Holovonones" and "Vonones".
Description.
The genus "Arucillus" was described by Šilhavý, 1971 with the type species "Arucillus hispaniolicus" Šilhavý, 1971. The genus was later included in the subfamily Metergininae.
Species.
These species belong to the genus "Arucillus":
Etymology.
The genus is masculine. Genus name origin is uncertain, but may derive from modification of Loma Rucilla (the type locality) + masculine Latin suffix -us.