Calonarius cupreorufus is a species of fungus in the family Cortinariaceae.

[2] It was first described in 1994 by the mycologist Tor Erik Brandrud who classified it as Cortinarius cupreorufus.

[2] In 2022 the species was transferred from Cortinarius and reclassified as Calonarius cupreorufus based on genomic data.

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