Papyrodiscus
Papyrodiscus D.A. Reid 1979, in Gorjón, Studies in Fungi 5(1), 250 (2020).
Diagnosis: Basidiome 1.7-4.5 cm diam., attached to very small twigs at the centre of the dorsal surface, and forming flattened circular or slightly pendulous, thin papery fruitbodies. Upper surface felty-tomentose, conspicuously zoned and of a uniform bright red-brown colour. Hymenial surface smooth, cream flushed with pink. Hyphal structure monomitic, consisting of hyphae, 3.5-5.5 μm wide, with thin to very slightly brown walls, freely branched and loosely entwined, lack clamp-connections at the septa. Cystidia fortuitous. A very thin-walled, hyaline fusiform or lanceolate sterile organs, up to 25(-40) μm long and 4.5-6.0 μm wide may be present. Basidia 12.0-17.0 × 4.5-6.0 μm, thin-walled, suburniform, with 4 sterigmata. Basidiospores 5.0-6.2 × 2.0-2.2 μm, thin-walled, hyaline, navicular and nonamyloid.
Monotypic genus from Papua-New Guinea. According to Reid (1979) is a stereoid fungus apparently showing certain affinities with the polypore genus Flavodon. We have examined the type and the species is similar to a thin papyraceous Stereum or Hymenochaete, with hyphae and hyphal system reminding Hymenochaetaceae, also blackening in KOH, but lacking setal elements.
Index Fungorum Number: IF18181
Type Species: Papyrodiscus ferrugineus D.A. Reid 1979
Species:
Papyrodiscus ferrugineus D.A. Reid 1979
References:
Gorjón, S.P. (2020). Genera of corticioid fungi: keys, nomenclature, and taxonomy. Studies in Fungi 5(1), 125–309.
Reid, D.A. (1979). Tremelloscypha and Papyrodiscus, two new genera of Basidiomycetes from Australasia. Beih. Sydowia 8, 332–334.
Recent Genus
ResiniciumRepetobasidiopsis
Repetobasidiellum
Recent Species
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Metacampanella dendrophora