Microscopic structures of the Skeletocutis nivea complex. A S. lepida, tramal skeletal hypha amongst generative hyphae (holotype) B S. semipileata, ends of generative and skeletal hyphae in trama (Miettinen 17135) C S. nemoralis, tube trama and hymenium (holotype) D S. nivea, tube trama and hymenium with encrusted generocystidia (epitype) E S. nivea, basidia (Miettinen 16350) F S. semipileata, basidia (epitype) G S. cummata, the largest basidia in the the S. nivea complex (Niemelä 9088).