Number of species catalogued in a central database as of 2011

Range ~1.2e6 species
Organism Biosphere
Reference Mora C, Tittensor DP, Adl S, Simpson AG, Worm B. How many species are there on Earth and in the ocean? PLoS Biol. 2011 Aug9(8):e1001127. doi: 10.1371/journal.pbio.1001127 p.1 right column bottom paragraphPubMed ID21886479
Method "[Researchers] compiled the full taxonomic classifications of ~1.2 million currently valid species from several publicly accessible sources"
Comments According to link there are 1.35e6 species as of 2013
Entered by Uri M
ID 109316