Other Places to Learn about North American Harvestmen:
Adriano Kury’s Classification of Opiliones – preferred classification, with diversity information and images
Gallery of Harvestmen Images (most from North America), by Marshal Hedin
Gallery of Harvestmen Images from North America by Dr. Axel Schönhofer
Adriano Kury’s OmniPaper Project – amazing resource for Opiliones taxonomic literature
Information about Opiliones, hosted by the Tree of Life Web Project
Harvestmen images and information on BugGuide
The definitive text on this group of arachnids – Harvestmen: The Biology of Opiliones
Cokendolpher & Lee. 1993. Catalogue of Cyphophthalmi, Eupnoi & Dyspnoi for Greenland, Canada, U. S. A, and Mexico – The taxonomy is slightly outdated, but this remains a very important regional catalog
A Learning Resource for North American Opiliones 