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Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12


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TaxonomyBrowse
Info
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Family Nemastomatidae

Harvestmen - Ortholasma coronadense Harvestman - Dendrolasma mirabile Harvestman - Ortholasma pictipes - female Harvestman - Ortholasma pictipes - female Harvestman - Ortholasma pictipes - female Dendrolasma mirabile Ortholasma - Ortholasma coronadense Ortholasma rugosum
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Opiliones (Harvestmen)
Suborder Dyspnoi
Superfamily Troguloidea
Family Nemastomatidae
Numbers
in US + Canada:
Dendrolasma - Dendrolasma mirabile, Dendrolasma dentipalpe
Ortholasma - Ortholasma colossus, Ortholasma pictipes, Ortholasma rugosum, Ortholasma levipes, Ortholasma coronadense
Nemastoma bimaculatum (introduced species)
Identification
Dendrolasma and Ortholasma have distinctive "cephalic hoods" which extend forward from the carapace. These taxa also have an ornate cuticular sculpturing on the dorsal abdomen.
Range
Pacific States, most Ortholasma restricted to California; O. pictipes northwards to British Columbia
Dendrolasma from far northern California, northwards to Alaska
Nemastoma bimaculatum is apparently introduced from Europe.
Habitat
Forests, mostly under woody debris
Print References
Shear, W.A. & Gruber, J. (1983) The opilionid subfamily Ortholasmatinae (Opiliones, Troguloidea, Nemastomatidae). American Museum Novitates, New York City, no. 2757. (online PDF)
Shear, W.A. & Gruber, J. (1987) Ortholasma setulipes Shear and Gruber is a synonym of Ortholasma coronadense Cockerell. The Journal of Arachnology, 15(1), 134–135. (online PDF)
Shear, W.A. (2010a) New species and records of ortholasmatine harvestmen from México, Honduras, and the western United States (Opiliones, Nemastomatidae, Ortholasmatinae). ZooKeys, 52, 9–45. (online PDF)
Shear WA (2016) New Canadian records of Nemastoma bimaculatum (Fabricius), and a brief summary of introduced Eurasian harvestmen in North America (Arachnida, Opiliones) Zootaxa 4088 (1): 139–140 (online PDF)