Holosiro

Holosiro is a genus of mite harvestman in the family Sironidae. It is found in North America, only in the USA, with one species in California, another in Oregon.

Description
The genus Holosiro was described by Ewing, 1923, with the type species Holosiro acaroides Ewing, 1923. For several years the genus was treated as a junior subjective synonym Siro Latreille, 1797.

Species
These species belong to the genus Holosiro:
 * Holosiro acaroides Ewing, 1923 – USA  (Washington, Oregon, California)
 * Holosiro calaveras (Giribet & Shear, 2010) – USA (California)
 * Holosiro ewingi Karaman, 2022 – USA (Oregon)
 * Holosiro shasta (Giribet & Shear, 2010) – USA (California)

Etymology
The genus is masculine, derived from Siro