Contains the names and phylogenetic lineages of more than 160,000 organisms that have molecular data in the NCBI databases. New taxa are added to the Taxonomy database as data are deposited for them.


FTP: NCBI Taxonomy

This site contains the full taxonomy database along with files associating nucleotide and protein sequence records with their taxonomy IDs. See the taxdump_readme.txt and gi_taxid.readme files for more information.


GenBank: Barcode

Tool for submission to the GenBank database of Barcode short nucleotide sequences from a standard genetic locus for use in species identification.


Genetic Codes

Displays the genetic codes for organisms in the Taxonomy database in tables and on a taxonomic tree.

Supports searching the taxonomy tree using partial taxonomic names, common names, wild cards and phonetically similar names. For each taxonomic node, the tool provides links to all data in Entrez for that node, displays the lineage, and provides links to external sites related to the node.

Generates a taxonomic tree for a selected group of organisms. Users can upload a file of taxonomy IDs or names, or they can enter names or IDs directly.

Taxonomy Statistics

Displays the number of taxonomic nodes in the database for a given rank and date of inclusion.

Taxonomy Status Reports

Displays the current status of a set of taxonomic nodes or IDs.