Sironidae
Guides
Siro
harvestmen
Siro is a genus of cyphophthalmid harvestmen (Opiliones) in the family Sironidae. These small arachnids are characterized by their eyeless condition, elongated bodies, and association with moist microhabitats. The genus was established by Latreille in 1795 and represents one of the early-recognized lineages of the suborder Cyphophthalmi, which diverged from other harvestmen early in the evolutionary history of the order. Species in this genus are distributed primarily in the Mediterranean region and parts of Europe.
Siro sonoma
Siro sonoma is a species of mite harvestman in the family Sironidae. It was originally described by Shear in 1980 and placed in the genus Siro. In 2022, the genus Arhesiro was erected to accommodate this species and Siro clousi, with S. sonoma becoming Arhesiro sonoma. As of 2023, taxonomic sources vary in their treatment, with some recognizing Arhesiro sonoma as the accepted name while others retain Siro sonoma. The species is known only from Sonoma County, California.