Input: |1=Taxon name

Output:

  • If Taxon is a regnum (or equivalent higher category),
    [[{{{1}}}]]
  • Else: Null.

Intended use: Call repeatedly for each taxon in a taxobox (using {{Get regnum()}}). Because a null string is returned for all non-regna, all that remains will be the regnum. Pass this output to {{Taxobox colour}} to generate colours for a taxobox.

  • {{is reg|Animalia}} → animalia
  • {{is reg|Columbidae}}
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