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)
Contributed by
Charles D. R. Stephen on 19 February, 2009 - 6:24pm
Additional contributions by
mhedinLast updated 11 January, 2017 - 10:23am