Cyphelloporia Karasiński, L. Nagy, Szarkándi, Holec & Kolařík, 2023

Karasiński, Dariusz, Nagy, László G., Szarkándi, János Gergö, Dvořák, Daniel, Kolařík, Miroslav & Holec, Jan, 2023, Cyphelloporia bialoviesensis (Fungi, Agaricales) - a new genus and species for a giant cyphelloid fungus from Białowieża virgin forest in Poland, Phytotaxa 589 (2), pp. 119-136 : 124

Cyphelloporia Karasiński, L. Nagy, Szarkándi, Holec & Kolařík , gen. nov. Figs. 3–6

MycoBank. MB843795

Etymology. Cyphello-: derived from the generic name Cyphella , formerly accommodating many cyphelloid fungi; - poria: resembling polypores with resupinate basidiomata, formerly classified in Poria Pers. sensu lato.

Type species. Cyphelloporia bialoviesensis Karasiński, Holec & Dvořák , see below.

Diagnosis. Cyphelloporia differs from the most related genus Rectipilus as well as from other cyphelloid fungi, especially Henningsomyces , by large basidiomata resembling some resupinate polypores and consisting of thousands of densely aggregated tubular receptacles that reach an unusual length of up to 10 mm and are crowded on distinct subiculum which is gelatinous when young. Genetically, Cyphelloporia belongs to the Rectipilus lineage but is very distant from Rectipilus in its LSU and ITS rDNA sequences.

Description. Basidiomata lignicolous on dead wood, cyphelloid, annual, resupinate, usually covering an area of several square decimeters, white to cream coloured when fresh, with individual receptacles initially sessile then short-stalked, densely packed, up to 10 mm long, arranged on a subiculum which is gelatinous when young. Hyphal system monomitic, generative hyphae with clamp connections, thin to slightly thick-walled. Hyphae on receptacle surface colourless, smooth, occasionally with short tuberculate to cylindrical or long flexuose outgrowths, hyphae of receptacles mouths cylindrical, unbranched, straight with flexuose ends. Basidia clavate with 4 sterigmata and basal clamp. Cystidia absent. Basidiospores principally ellipsoid to subglobose, hyaline, smooth, thin-walled, inamyloid, non-dextrinoid, acyanophilous.

Figures

FIGURE 3. Basidiomata of Cyphelloporia bialoviesensis.—a: Białowieża National Park in NE Poland, lowland primeval forest of the Tilio-Carpinetum association with Picea abies, large basidiomata on big fallen trunk of Picea abies in advanced stage of decay, photo D. Karasiński.—b: marginal part of basidioma with subiculum and sessile barrel-shaped young receptacles, photo D. Karasiński.—c: young basidioma with well visible subicular layer, photo D. Karasiński.—d: marginal part of mature basidioma with dry subicular layer, photo D. Dvořák (BRNU 680032).—e: mature basidioma with ± 1 cm long receptacles, photo D. Karasiński.

FIGURE 4. Receptacles of Cyphelloporia bialoviesensis (holotype: KRAM F-59691). Line drawing by D. Karasiński.

FIGURE 5. Microcharacters of Cyphelloporia bialoviesensis (holotype:KRAM F-59691), from left to right:external hyphae on receptacle surface, hyphae of receptacle mouth, basidiospores, hymenium. Scale bars = 10 µm (left: for external hyphae and hyphae of receptacle mouths; right: for basidiospores and hymenium). Line drawing by D. Karasiński.

FIGURE 6. Microcharacters of Cyphelloporia bialoviesensis (PRM 944810).—a: basidiospores (grouped from different sites of the same microscopic mount).—b: hymenium.—c: hymenium with receptacle trama.—d, e: hyphae of receptacle mouth.—f, g: external hyphae on receptacle surface. Scale bars = 10 µm. Photos by J. Holec.