To the extent possible under law, Peter E. Midford has waived all copyright and related or neighboring rights to the Taxonomic Rank Vocabulary (TAXRANK). This work is published from the United States. It is requested that users of this vocabulary cite it at the following URI: http://www.phenoscape.org/wiki/Taxonomic_Rank_Vocabulary
A level of depth of a taxon in a taxonomic hierarchy.
A token asserting that the taxon was not assigned a rank.