About  This template is used to automatically create a standard category structure throughout :Category:Taxa by year of formal description.  Related discussions include, but are not limited to (newest first):   WikiProjects   WT:TREE OF LIFE#Category:Sponges vs. Category:Poriferans  WT:PALAEONTOLOGY#Fossil parataxa described in YEAR  WT:MARINELIFE#Bivalves/Cephalopods/Chitons described in YYYY categories  WT:PALAEONTOLOGY#'Taxa described in' categories  WT:INSECTS#'Insects described in' category tree mostly ok?  WT:TREE OF LIFE#Any desire to eliminate 'X described in the YYth century' type container categories?  WT:TREE OF LIFE#Request for comment: categorizing by year of formal description  WT:LEPIDOPTERA#Post-Caftaric category straightening-out/clean-up.   Decadal CfDs   2018 October 18#Category:Archaea described in the 1920s  2018 October 13#Category:Fungi described in the 1750s  2018 October 8#Category:Bacteria described in the 1780s  2018 October 3#Category:Animals described in the 1750s  2018 September 22#Category:Spiders described in the 1750s  2018 August 26#Category:Plants described in the 1750s   Non-decadal CfDs   [[Wikipedia:Categories for discussion/Log/2018 November 4#Category:<Animal>s described in <year> with very confined scope and small size|2018 November 4#Category:<Animal>s described in <year> with very confined scope and small size]]  Anemones, ants, aphids, bees, caddisflies, centipedes, cicadas, damselflies, dragonflies, fleas, flies, lacewings, mantises, scale insects, sea cucumbers, stink bugs, termites, ticks, urchins, & wasps.  2018 November 4#Category:Mites described in 1959  2018 October 12#Category:Lepidoptera described in 1758  2018 October 5#Category:Vertebrates described in 1771  2014 November 26#Category:Invertebrates described in 1896  If you wish to make significant changes, please discuss at Wikipedia talk:WikiProject Tree of Life first.   Creating new category trees   Avoid creating overly-specific categories, especially those where all years contain a trivial number of pages. These categories do little to aid the overall structure, causing more disruption and ambiguity than order. These may be CFD'd, or even CSD'd, after some grace period for initial population; for example, if only several years have been created out of potentially several hundred, or if many years have been created but all contain a trivial number of pages.  Chances are, there is already an appropriate category structure in place, which should be considered before creating new trees/branches.  To create a new tree, copy an existing, similar tree in Module:Category described in year/conf, and paste it in an appropriate spot in that table, following the same general table format, and updating any group-specific values.  If/when a new category tree is created, make sure that any red-linked parents categories are also created. You can find categories with red-linked parents here.   Usage   No parameters are needed. Instead, the name of the calling category is used to determine its place in the tree.   Sitelinks    links are automatically produced if either the  property and/or an "Other sites" sitelink to commons exist at Wikidata. See  for both uses. Duplicate values are ignored.   links are automatically produced if the appropriate sitelink exists at Wikidata. See  for an example.   Testing   When placing this template in non-category space, i.e. for testing purposes, a category parameter is required.   Tracking categories