Fragiliporia fragilis
Fragiliporia fragilis Y.C. Dai, B.K. Cui & C.L. Zhao, in Zhao et al., Fungal Diversity 70: 119 (2015)
Etymology: fragilis (Lat.) referring to the brittle basidiocarps.
Diagnosis: Basidiocarps annual, resupinate, very soft, without odor or taste when fresh, when dry becoming brittle and powdery when bruised, up to 15 cm long, 5 cm wide, 6 mm thick at center. Pore surface grayish-buff to lavender when fresh, turning to vinaceous gray to grayish brown upon drying; pores angular, 0.5–1 per mm; dissepiments thin, entire. Sterile margin distinct, white, more or less fimbriate, up to 6 mm wide. Subiculum orange-yellow, up to 0.5 mm thick. Tubes concolorous with pore surface, fragile when dry, up to 5.5 mm long.
Basidiospores allantoid, hyaline, thin-walled, smooth, IKI–, CB–, (4.6–)4.8–5.4(−5.6)×(1.5–)1.7–2(−2.2) μm, L=5.05 μm, W=1.89 μm, Q=2.57–2.73 (n=180/6). Tubes. Generative hyphae hyaline, thick-walled, occasionally branched, subparallel along the tubes, 3–5 μm in diameter. Cystidia and cystidioles absent; basidia long clavate to pyriform, with four sterigmata and a basal clamp connection, 15–18×5–6 μm; basidioles abundant (hymenia dominant by basidioles), in shape similar to basidia, but slightly smaller. Hyphal structure. Hyphal system monomitic; generative hyphae thick-walled, bearing clamp connections, hyphae frequently branched from clamp connections, branched hyphae mostly H-, W- or Y-shaped; all hyphae usually encrusted with crystals, IKI–, CB–; hyphae swollen in KOH. Subiculum. Generative hyphae hyaline, thick-walled, frequently branched, interwoven, 4–6 μm in diameter. Rot type. A white rot.
Index Fungorum number: IF809343
Figure 1. Maximum Parsimony strict consensus tree illustrating the phylogeny of Fragiliporia fragilis, and related species in Agaricomycetes based on ITS+nLSU sequences. Branches are labeled with maximum likelihood bootstrap higher than 70 %, parsimony bootstrap proportions higher than 50 % and Bayesian posterior probabilities more than 0.95 respectively. Clade names follow Binder et al. (2013).
Figure 2. Maximum Parsimony strict consensus tree illustrating the phylogeny of the new family Fragiliporiaceae, and more representative available families in Polyporales, based on the combined ITS+nLSU+mtSSU+ TEF1+RPB2 sequence datasets. Branches are labeled with maximum likelihood bootstrap higher than 70 %, parsimony bootstrap proportions higher than 50 % and Bayesian posterior probabilities more than 0.95. Clade names follow Binder et al. (2013)
Figure 3. Basidiomata of Fragiliporia fragilis. Bars: a–4 cm (holotype); b– 2 cm (Dai 13561)
Figure 4. Microscopic structures of Fragiliporia fragilis (drawn from the holotype). a. Basidiospores; b. Basidia and basidioles; c. H-, Y- and W-shaped generative hyphae; d. Hyphae from trama; e. Hyphae from subiculum. Bars: a–5 μm; b–e–10 μm
Reference:
Zhao, C. L., Cui, B. K., Song, J., & Dai, Y. C. (2015). Fragiliporiaceae, a new family of Polyporales (Basidiomycota). Fungal Diversity, 70(1), 115-126.
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