There is limited information available from the type description of C. cupularis. With a lack of occurrence data and information on the habitat and ecology of the species, it is not possible to assess the status of its population or distribution.  In addition, a question of synonymy should be examined to ensure that C. cupularis is assessed under the correct species in future.
It is therefore now assessed as Data Deficient.

Cantharellus cupularis was described by E.M. Fries in 1821 in Sytema Mycologicum.

On Index Fungorum, the basionym for C. cupularis is Merulius cupularis (described by G. Wahlenberg in 1812), and other homotypic synonyms for M. cupularis are Apus cupularis, Arrhenia cupularis and
Auriscalpium cupulare. Preliminary assessment based on Index Fungorum taxonomy.

Note that on GBIF, C. cupularis is listed as a synonym of Hohenbuehelia unguicularis, as are M. cupularis, Arrhenia cupularis and A. cupulare.

Chanterelle species to be assessed as part of the chanterelle comprehensive project.

C. cupularis and basionym described from Polmack, in the Finnmark region of Norway.
The extent of its range is unknown, no occurrence data for C. cupularis available on GBIF.

Occurrence data is available on GBIF for Hohenbuehelia unguicularis, which lists C. cupularis as a synonym. H. unguicularis records appear across much of Northern Europe, with most in Norway and Sweden. This distribution may be taken into account in a future assessment using the GBIF taxonomy.

Based on taxonomy from Index Fungorum, species only known from type descriptions of homotypic synonyms.

C. cupularis and basionym described on rotten wood of Salix phylicifolia.

No known threats, and Salix phylicifolia, the substrate species from the type description has been assessed as LC.

Confirmation of taxonomic status, population and distribution data and ecology required to better assess species.