Ganoderma adspersum – synoniem of Ganoderma australe
Ganoderma applanatum – synoniem of Ganoderma lipsiense
Geastrum nanum – synoniem of Geastrum schmidelii
Geastrum sessile – synoniem of Geastrum fimbriatum
Geastrum vulgatum – synoniem of Geastrum rufescens
Geoglossum nigritum – synoniem of Geoglossum umbratile
Gerronema daamsii – synoniem of Omphalina marchantiae
Gerronema postii – synoniem of Omphalina postii
Gloeocystidiellum leucoxanthum – synoniem of Megalocystidium leucoxanthum
Grifola umbellata – synoniem of Polyporus umbellatus
Gymnopilus penetrans – synoniem of Gymnopilus sapineus
Gymnopilus spectabilis – synoniem of Gymnopilus junonius