Historical and current presence records of crayfish species in the Iberian Peninsula [Dataset]

This dataset contains a thorough collation of available records of the presence of Italian, red swamp and signal crayfish in the Iberian Peninsula from various sources and databases. For the Italian crayfish we obtained records for three periods: i) a historical situation (around 1850), ii) a pre-collapse snapshot (around 1960), close to the species maximum range, and iii) a recent, post-collapse situation (up to 2010). For the red swamp and signal crayfish we integrated recent records, basically collected after 2000. All records were rescaled using subcatchments as spatial units (i.e., hydrological units delimited by water divides and river confluences; mean area = 26.3 km2), derived from a 90-m digital elevation model.