Tirrenosiro is a genus of harvestmen in the suborder Cyphophthalmi with two described species (as of 2024). Both species are found in Southern Europe.
The genus Tirrenosiro was described by Karaman, Mitov & Snegovaya, 2024, with the type species Parasiro minor Juberthie, 1958.
These species belong to the genus Tirrenosiro:
The genus is masculine. The prefix is derived from the Tyrrhenian Sea, reflecting the distribution of the described species. The suffix echos the name Siro, as a common suffix for several cyphophthalmid genera.