NCBI's Taxonomy Database - Over 300,000 Species with Formal Scientific Names!

NCBI’s Taxonomy Database has now surpassed 300,000 individual records of species with formal scientific names. The majority of these represent eukaryotic organisms. While worldwide estimates of prokaryotic and viral species number in the millions or tens of millions, very few have been formally described, isolated, or are able to be cultured. However, the Taxonomy database contains listings for nearly all of the prokaryotes and viruses that have been described.

The Taxonomy Database, created in 1991, is a standard nomenclature and classification repository that includes organism names and taxonomic lineages for each of the sequences represented in the International Nucleotide Sequence Database Collaboration (INSDC).

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