Rubroboletus demonensis (GS10244, holotype). Microscopic structures. a Pileipellis in 3% NH3+ Congo Red, with Differential Interference Contrast (DIC) (GS10244). b Spores in 3% NH3 (GS10244). c left Spores in 3% NH3 (GS10274). c right Abnormal spores in 3% NH3 (GS10243). d Basidia in 3% NH3+ Congo Red (GS10245). e Facial cystidia in 3% NH3+ Congo Red, with DIC (GS10245). f Marginal cystidia in 3% NH3+ Congo Red, with DIC (GS10245). Bars = 10 μm.