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- Cortinarius gaiacofuscus – France
- Cortinarius galeacampanulatus – France
- Cortinarius galeobdolon
- Cortinarius galeriniformis – Brazil
- Cortinarius galerinoides – France
- Cortinarius gallairei – France
- Cortinarius gallurae – Italy
- Cortinarius gallurensis – Italy
- Cortinarius gamundiae – Argentina
- Cortinarius gaudiosus – Argentina
- Cortinarius gausapatus – Switzerland
- Cortinarius gayi – Argentina
- Cortinarius gemmeus – New Zealand
- Cortinarius gentianeus – France
- Cortinarius gentilis
- Cortinarius gentilissimus – USA
- Cortinarius geophilus – France
- Cortinarius georgianae – France
- Cortinarius georgiolens – France
- Cortinarius geosmus
- Cortinarius glaucopus
- Cortinarius griseoluridus
- Cortinarius griseoviolaceus
Read more about this topic: List Of Cortinarius Species