Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A: Number of species described per year for all taxonomic groups. B: Species-description accumulation curves for marine species taking into account all taxonomic groups. Period: 1750–2000. Data from OBIS database (using only “valid names” which corrects for synonyms).
