The Stygofauna Mundi database is an Access database gathering all the information on groundwater crustacean species distribution contained in 36 chapters of Botosaneanu L. (1986). These chapters were digitised in the framework of the EU FP7 BioFresh project. Botosaneanu L. (1986). Stygofauna Mundi. A faunistic, distributional, and ecological synthesis of the world fauna inhabiting subterranean waters (including the Marine Interstitial). Leiden E.J. BRILL. The Netherlands. 740 pages. More information on this dataset can be found in the Freshwater Metadatabase - BF_DIG2 (http://www.freshwatermetadata.eu/metadb/bf_mdb_view.php?entryID=BF_DIG2).