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Pseudoscorpiones: Paleontology

The oldest fossil pseudoscorpion is Dracochela deprehendor from the Devonian of New York, which has many features found in modern pseudoscorpions. Several Cretaceous fossils have been described from Myanmar and France. About 40 species of Tertiary amber fossils have been described, mostly from Europe and Central America. The Tertiary species have been mostly ascribed to recent genera.

A summary list of fossil spiders and their relatives

Fossil spiders have not been fully cataloged since Bonnet’s Bibliographia Araneorum and are not included in the current World Spider Catalog. Since Bonnet’s time there has been considerable progress in our understanding of the fossil record of spiders – and other arachnids – and numerous new taxa have been described. For an overview see Dunlop & Penney (2012). Spiders remain the single largest fossil group, but our aim here is to offer a summary list of all fossil Chelicerata in their current systematic position; as a first step towards the eventual goal of combining fossil and Recent data within a single arachnological resource. 

http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf

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