Genus of fungi
Thaxterogaster is a genus of fungi in the family Cortinariaceae. 
Taxonomy.
The genus was created in 1951 by the German mycologist Rolf Singer to contain the novel species "Thaxterogaster magellanicum" and "Thaxterogaster violaceum." Several other species were placed in this genus in the subsequent decades but then reclassified as "Cortinarius" or "Descolea" species.
In 2022 the family Cortinariaceae, which previously contained only the one genus of "Cortinarius" was reclassified based on genomic data and split into the genera of "Cortinarius", "Aureonarius", "Austrocortinarius", "Calonarius", "Cystinarius", "Hygronarius", "Mystinarius", "Phlegmacium", "Thaxterogaster" and "Volvanarius". Numerous "Cortinarius" species were transferred into the genus of "Thaxterogaster" as a result of this work.
The genus is further divided with subgenus and section classifications:
Etymology.
"Thaxterogaster" is named for the mycologist Roland Thaxter who deposited a specimen at the Farlow Herbarium under the name "Secotium magellanicum". This specimen was examined by Singer and used as the basis for his description of "Thaxterogaster magellanicum". The genus is named for Thaxter whilst 'gaster' refers to the, now obsolete, class Gasteromycetes since the species is gasteroid in form.
Species.
As of January 2023, Species Fungorum accepted 136 species of "Thaxterogaster".
References.
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