Worldwide species

by Theo Blick (callistus(a)theoblick.de) and Samuel Zschokke (samuel.zschokke(a)unibas.ch)

Worldwide species number, derived from The World Spider Catalog compiled by Norman I. Platnick (2000-2014) and by the WSC-team (since 2015). Increase from the World Spider Catalog 2.0 (2001) to 18.8 (2017). Average increase: 590 p.a. ±180.