HolosiroHolosiro 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.DescriptionThe 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.SpeciesThese species belong to the genus Holosiro:EtymologyThe genus is masculine, derived from ''Siro''