There is limited information available from the type description of the species, and no subsequent occurrence records of C. mamillatus.  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. It is therefore now assessed as Data Deficient.

Cantharellus mamillatus was described by A. Blytt in 1905 and was listed by Saccardo in 1912.

GBIF lists taxonomy as doubtful.

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

Range unknown, described from Krokhaug in Norway from type.
No occurrence data available on GBIF.

Only known from type description.

Type described from ‘the earth’, but extent and type of habitat unknown. The type description does say C. mamillatus is similar to an Omphalia in habitat, but not further information is available.

No known threats.

Confirmation of taxonomic status and an evaluation of its distribution, population, habitat and ecology is required to better assess this species.