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Discussion of 2018 gathering

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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowse
Info
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Family Nemastomatidae

Harvestman? - Ortholasma rugosum Harvestman - Dendrolasma mirabile Hooded harvestman - Ortholasma pictipes Hooded harvestman - Ortholasma pictipes Harvestman - Ortholasma pictipes - female harvestman #5 voucher image - Dendrolasma mirabile - male Ortholasma coronadense Ortholasma colossus
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)