This is a tracking category . It is used to build and maintain lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme . More information: This category is hidden on its member pages —unless the corresponding user preference is set. These categories are used to track, build and organize lists of pages needing "attention en masse " (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience. These categories also serve to aggregate members of several lists or sub-categories into a larger, more efficient list ( discriminated by classifications ).

Administrators: Please do not delete this category even if it is empty! This category may be empty occasionally or even most of the time.

This is a tracking category for {{ Taxonbar }} templates which do not have a |from#= parameter corresponding to the Wikidata item (also referred to as 'entity' or 'QID') which points to the Wikipedia article.

Possible reasons for this include (but aren't limited to):

1. it is most likely that the Wikidata item that once pointed to the categorized page has changed, or
2. one or more |from#= parameters contain garbage (less likely; see Category:Taxonbars with invalid from parameters ), or
3. the page was copied as a template and the creator forgot to update the |from= parameter, or
4. Wikidata has separate items for a taxon and a topic associated with the taxon (e.g, a disease and its causal agent, or a vegetable and the plant species that produces it), and the Wikipedia article is linked to the associated concept at Wikidata.

Please notify en:Wikipedia talk:WikiProject Tree of Life if you do not know how to resolve this/these problem(s).

Pages in this category should only be added by Module:Taxonbar .