Polyporales » Phanerochaetaceae » Crepatura

Crepatura ellipsospora

Crepatura ellipsospora C.L. Zhao 2019, in Ma & Zhao, Mycological Progress, 18, 785-793 (2019)

Etymology:  ellipsospora (Lat.): referring to the ellipsoid basidiospores.

Diagnosis: Fruiting body. Basidiocarps annual, resupinate, not separable, coriaceous, without odor or taste when fresh, becoming rigid up on drying, up to 18 cm long, 100–300 μm thick. Hymenial surface smooth to irregularly tuberculate, cream to pale yellow when fresh, turn to yellow to yellowish brown upon drying, concentrically and radially cracking. Sterile determined, concolorous with hymenial surface. Hyphal structure. Monomitic; generative hyphae thick-walled bearing both clamp connections and simple septa, simple septa more frequent than clamps, IKI–, CB–; tissues unchanged in KOH. Subiculum absent or indistinct, hymenium thickening, hyphae colorless, more or less interwoven, thick-walled, rarely branched, 3.5–5 μm in diam. Hymenium. Cystidia and cystidioles absent; numerous crystals present among the hyphae, basidia clavate, with two sterigmata and a basal clamp connection, 18.5–35.5 × 5.5– 6.5 μm; basidioles dominant, similar in shape to basidia, but slightly smaller. Basidiospores ellipsoid, hyaline, thick-walled, smooth, IKI–, CB–, (6–)6.5–7.5(–8.5) × (3.5–)4–5(–5.5) μm, L = 7.15 μm, W= 4.57 μm, Q = 1.51–1.63 (n = 120/4).

Index Fungorum Number: IF830231

Figure 1. Maximum parsimony strict consensus tree illustrating the phylogeny of Crepatura ellipsospora and related species in Polyporales based on ITS+nLSU sequences. Branches are labeled with parsimony bootstrap values (before slash) higher than 50% and Bayesian posterior probabilities (after slash) equal to and more than 0.95. Clade names follow Miettinen et al. (2016)

Figure 2. Basidiomata of Crepatura ellipsospora (holotype). Bars: a 1 cm, b 5 mm

Figure 3. Microscopic structures of Crepatura ellipsospora (drawn from the holotype). a Basidiospores; b a section of hymenium; c Subiculum. Bars: a 5 μm; b, c 10 μm

 

References:

Ma, X., & Zhao, C. L. (2019). Crepatura ellipsospora gen. et sp. nov. in Phanerochaetaceae (Polyporales, Basidiomycota) bearing a tuberculate hymenial surface. Mycological Progress, 18, 785-793.

Miettinen, O., & Spirin, V., & Vlasák, J., & Rivoire, B., & Stenroos, S., Hibbett, D. (2016). Polypores and genus concepts in Phanerochaetaceae (Polyporales, Basidiomycota). MycoKeys 17, 1–46.

 

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