Dyspnoi
Guides
Acuclavella shoshone
Acuclavella shoshone is a species of harvestman (order Opiliones) in the family Ischyropsalididae. It was described by Shear in 1986 and is known from North America. The specific epithet "shoshone" likely refers to the Shoshone region or peoples, reflecting its geographic association. As a member of the suborder Dyspnoi, it belongs to a group of harvestmen characterized by particular respiratory and morphological features. Very little detailed biological information has been published for this species.
Crosbycus dasycnemus
Crosbycus dasycnemus is a species of harvestman in the family Taracidae, described by Crosby in 1911. It belongs to the suborder Dyspnoi, a group of long-legged harvestmen. Records indicate occurrence in scattered localities across the eastern and central United States. The species is poorly documented, with minimal published information on its biology.
Hesperonemastoma
Hesperonemastoma is a genus of harvestmen (Opiliones) in the family Taracidae, established by Gruber in 1970. The genus contains five described species distributed in North America. These harvestmen are classified in the suborder Dyspnoi and superfamily Ischyropsalidoidea.
Hesperonemastoma modestum
Hesperonemastoma modestum is a species of harvestman (Opiliones) in the family Taracidae. It was described by Nathan Banks in 1894 and occurs in western North America. The species has been recorded from British Columbia and several locations in California and Oregon. Like other taracids, it belongs to the suborder Dyspnoi.
Ischyropsalididae
Ischyropsalidid Harvestmen
Ischyropsalididae is a family of harvestmen (Opiliones) comprising 35 described species across three genera: Acuclavella (thorn harvestmen of North America), Ceratolasma, and Ischyropsalis (predominantly European). The family exhibits a disjunct distribution spanning Europe and western North America. Several species are troglophilic, inhabiting cave systems with documented adaptations to subterranean environments including seasonal activity patterns and microhabitat specialization.
Nemastomatidae
Nemastomatid Harvestmen
The Nemastomatidae are a family of harvestmen (Opiliones: Dyspnoi) comprising approximately 170 described species in 16 extant genera. The family is divided into two subfamilies with disjunct distributions: Nemastomatinae in Europe, North Africa, and western Asia, and Ortholasmatinae in western North America and eastern Asia. Members are characterized by variable body size (1–6 mm) and often possess elongated, thread-like pedipalps. The family is monophyletic and likely sister to the Dicranolasmatidae and Trogulidae.
Oskoron
A genus of harvestmen in the family Taracidae, established by Shear in 2016. It was erected to accommodate O. spinosus, transferred from Taracus where it had been placed by Banks in 1894, along with two newly described species from the Pacific Northwest. The genus is distinguished from Taracus by cheliceral morphology.
Taracus silvestrii
Taracus silvestrii is a species of harvestman in the family Taracidae, described by Roewer in 1929. It belongs to the suborder Dyspnoi, a group of long-legged arachnids commonly known as harvestmen or daddy longlegs. Members of the genus Taracus are characterized by their elongated body form and exceptionally long, slender legs relative to body size. The species is known from limited collection records in North America.