Catalogue of Life 2009 Annual Checklist
The Species 2000 & ITIS Catalogue of Life is planned to become a comprehensive catalogue of all known species of organisms on Earth. Rapid progress has been made recently and this, the ninth edition of the Annual Checklist, contains 1,160,711species. Please note that this is probably just more than half of the world’s known species. This means that for many groups it continues to be deficient, and users will notice that many species are still missing from the Catalogue.