Databases

Contains the names and lineages of more than 160,000 organisms, both living and extinct, that are represented in NCBI's genetic databases with at least one nucleotide or protein sequence. New organisms are added to the Taxonomy database as sequence data are deposited for them.

Tools

Genetic Codes
Displays the genetic codes for organisms in the Taxonomy database in tables and on a taxonomic tree.
Taxonomy Browser
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 taxonomy nodes in the database by rank and year of inclusion in the database.
Taxonomy Status Reports
Displays the current status of a set of taxonomic nodes or IDs.

Downloads

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.

Submissions

Barcode Submission
Tool to submit Barcodes, short nucleotide sequences from a standard genetic locus for use in species identification.