Tephrocybella constrictospora (TO HG3329, holotype). a–c Spores (a in Cotton blue, b in ammoniacal Congo red, c in 3% KOH). d Basidia and basidioles (in 3% KOH). e Cheilocystidia (in ammoniacal Congo red). f Pileipellis (in water). g Stipitipellis (elements with encrusting pigment, in water). Scale bars a, b = 5 µm, c–g = 10 µm