Phlegmacium balteaticlavatum is a species of fungus in the family Cortinariaceae.

[1] It was originally described in 2014 and placed in the large mushroom genus Cortinarius (subgenus Phlegmacium).

[1] In 2022 the species was transferred from Cortinarius and reclassified as Phlegmacium balteaticlavatum based on genomic data.

[2] The species is found in Finland, where it grows in mixed forests with trees such as birch, poplar, willow, spruce, and pine.

[3] The specific epithet balteaticlavatum refers to both its affinity to C. balteatus and its club-shaped (clavate) stipe.