Cyphophthalmi
Guides
Metasiro
Metasiro is a genus of mite harvestmen (Cyphophthalmi) in the family Neogoveidae, established by Juberthie in 1960. The genus contains three described species: M. americanus, M. sassafrasensis, and M. savannahensis. These small arachnids are part of the ancient suborder Cyphophthalmi, which represents the most basal lineage of harvestmen. Species in this genus have been documented from eastern North America.
Metasiro sassafrasensis
mite harvestman
Metasiro sassafrasensis is a species of mite harvestman (suborder Cyphophthalmi) in the family Neogoveidae. It was described in 2014 by Clouse and Wheeler. The species is known from a single locality in Grady County, North America. Like other Cyphophthalmi, it is a small, eyeless harvestman adapted to cryptic habitats.
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 boyerae
mite harvestman
Siro boyerae is a species of mite harvestman in the family Sironidae. It was originally described as Neosiro boyerae by Giribet & Shear in 2010, and was previously placed in the genus Siro before taxonomic revision. This small arachnid belongs to the suborder Cyphophthalmi, a group of primitive harvestmen characterized by their eyeless condition and compact body form.
Siro exilis
Siro exilis is a species of mite harvestman (order Opiliones, suborder Cyphophthalmi) in the family Sironidae. The species was first described by Hoffman in 1963 and is currently recognized as a synonym of Neosiro exilis. It occurs in North America, with records from counties in Garrett, Giles, Mercer, Montgomery, and Pendleton. As a cyphophthalmid harvestman, it belongs to a group of small, eyeless arachnids that inhabit moist microhabitats in forested environments.
Siro kamiakensis
Siro kamiakensis is a species of mite harvestman, a small arachnid in the family Sironidae. It was described by Newell in 1943 and is currently classified under the genus Neosiro, though it was historically placed in Siro. The species is found in North America, with records from the Pacific Northwest region of the United States.
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.
Sironidae
Sironid Harvestmen
Sironidae is a family of Cyphophthalmi harvestmen comprising more than 60 described species. It was the first described family of the suborder Cyphophthalmi and remains among the least understood phylogenetically. The family exhibits a predominantly Laurasian distribution, with species concentrated in temperate Europe and the west coast of North America. Monophyly of the family is poorly supported with traditional molecular markers; the Mediterranean genus Parasiro and Japanese genus Suzukielus sometimes branch basally relative to other sironids.