Thaxterogaster caesiophylloides

Thaxterogaster caesiophylloides is a species of fungus in family Cortinariaceae.

Taxonomy
It was described as new to science in 2014 and classified as Cortinarius caesiophylloides. It was placed in the (subgenus Phlegmacium) of the large mushroom genus ''Cortinarius. ''

In 2022 the species was transferred from Cortinarius and reclassified as Thaxterogaster caesiophylloides based on genomic data.

Etymology
The specific epithet caesiophylloides alludes to both its similarity to Cortinarius multiformis var. caesiophyllus (now named C. caesiolamellatus), and the bluish tints in the gills.

Habitat and distribution
Found in Fennoscandia, where it grows on the ground in mesic coniferous forests. It has since been found in Slovakia.