BioImages: The Virtual Field-Guide (UK)

OPILIONES (harvestmen)

Subtaxa (ie subgroups of this Order)

DYSPNOI (a suborder of harvestmen) Suborder 2 subtaxa  
NEMASTOMATIDAE (a family of harvestmen) Family 2 subtaxa  
Mitostoma chrysomelas (Hermann, 1804) (a harvestman)
Dorsal view
Species    
Nemastoma bimaculatum (Fabricius, 1775) (a harvestman)
Adult - dorsal view
Species    
EUPNOI (a suborder of harvestmen)
PHALANGIIDAE (a family of harvestmen), eg: Dicranopalpus caudatus (a fork-palped harvestman) - Female - dorsal view
Suborder 14 subtaxa 3 ident refs

Suggested Literature

Identification Works

Spider and Harvestman Recording Scheme website: http://srs.britishspiders.org.uk/portal.php/p/Locate Spider and Harvestman Recording Scheme website
Cloudsley-Thompson, J.L. & Sankey, J., 1961 Land Invertebrates, a guide to British worms, molluscs and arthropods, excluding insects
Hillyard, P.D. & Sankey, J.H.P., 1989 Harvestmen (ed 2)
Hillyard, P.D., 2005 Harvestmen (ed 3)
Jones, D., 1983 The Country Life Guide to Spiders of Britain and Northern Europe
Les araignees de Belgique et France - Opiliones: http://arachno.piwigo.com/index?/category/697-opiliones Les araignees de Belgique et France - Opiliones
Richards, R., 2010 Guide to Harvestmen of the British Isles
Sankey, J.H.P. & Savory, T.H., 1974 British Harvestmen
Savory, T.H., 1955 The World of Small Animals
Wijnhoven, H. De Nederlandse hooiwagens (Opiliones)

BioInfo BioInfo (www.bioinfo.org.uk) has 4 general literature references to OPILIONES (harvestmen)

OPILIONES may also be covered by literature listed under:

BIOTA
(living things)
Eukaryota
(eukaryotes)
ANIMALIA
(animals)
ARTHROPODA
(arthropods)
ARACHNIDA
(mites, spiders, false scorpions, harvestmen etc.)

BioInfo BioInfo (www.bioinfo.org.uk) has 3 feeding and other relationships of OPILIONES (harvestmen)

Further Information

Lab. techniques The male or female genitalia are sometimes required for identification.

They can be made to extrude by lying the spider on its back, then gently pressing/squeezing the body with finger and thumb. Maintain the pressure as the organ everts to its full length - they are surprisingly long.
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