Microscopic features of Mycena polycystidiata (FFAAS0417, holotype) a–f basidiospores g basidia h–l cheilocystidia m–r pleurocystidia s pileipellis and hypodermium t lamellar trama u stipitipellis and caulocystidia. Scale bars: 5 μm (a–f); 10 μm (g); 30 μm (h–r); 40 μm (s–u).