Ortholasma
Banks, 1894
Ortholasma is a of () in the Nemastomatidae, containing five described . The genus was established by Banks in 1894 and has been revised by Shear (2010). It is the genus of the Ortholasmatinae. Species in this genus are small-bodied, short-legged dyspnoan harvestmen found in western North America.
Pronunciation
How to pronounce Ortholasma: /ɔːr.θoʊˈlæz.mə/
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Identification
Ortholasma can be distinguished from other nemastomatid by their compact body form and relatively short legs compared to body length. The is characterized by specific features of the male , including the structure of the glans and , as detailed in Shear's 2010 revision. The Ortholasmatinae, which contains only this genus, is distinguished from other Nemastomatidae by particular arrangements of and tarsal .
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Habitat
of Ortholasma have been documented in moist forested environments, including coastal and montane regions of western North America. They are typically found in leaf litter, under bark, and in other cryptic microhabitats that retain humidity.
Distribution
Western North America, with documented occurrences in coastal California, the Pacific Northwest, and montane regions extending into the Rocky Mountains.
Ecological Role
As small-bodied in forest floor , Ortholasma contribute to decomposition and in their .
Similar Taxa
More Details
Taxonomic Revision
The was comprehensively revised by Shear (2010), which clarified boundaries and described new species, bringing the total to five described species.
Subfamily Placement
Ortholasma is the sole in the Ortholasmatinae, which was established to accommodate its distinct morphological characteristics separate from Nemastomatinae.