Podoscypha ahuensis S. Shen, C.W. Zhang, and B. W. Zhang, 2024

Shen, Shan, Zhang, Cai-Wen & Zhang, Bao-Wei, 2024, Podoscypha ahuensis sp. nov. (Polyporales, Basidiomycota) evidenced by the morphological characters and phylogenetic analyses, Phytotaxa 662 (3), pp. 262-270 : 266-267

Podoscypha ahuensis S. Shen, C.W. Zhang, and B. W. Zhang , sp. nov. ( Figs. 3, 4 )

MycoBank no.: MB 853381

Diagnosis— Podoscypha ahuensis is characterized by its smooth, salmon pink, flesh pink to pink pileal surface, distinct swollen gloeocystidia, presence of pilocystidia and caulocystidia, small, thin-walled, ellipsoid to broadly ellipsoid basidiospores, on angiosperms from subtropical China.

Type.— China. Anhui Province, Hefei, Shushan District, Anhui University, Qingyuan Campus, on the dead branch of angiosperm, 22 September 2023, AHU 337 (holotype, AHUBM).

Etymology.— ahuensis (Lat.) : The new species is named after AHU, the abbreviation for Anhui University, where the samples of this species were discovered and collected.And ‘ahuensis’ is an adjective, referring to the locality Anhui University of the type specimens.

Basidiomata. —Basidiocarps annual, gregarious, without odor or taste and corky when fresh, becoming hard corky upon drying, Pilei rod-shaped, spathulate or fan shaped when young, then the two sides of the fan are gradually joining together and it became a complete cupuliform, or a notched cupuliform when mature, stipe up to 1–3 cm high, 1.8–3.5 cm in diameter, 250–450 µm thick. Basidiocarps surface smooth, salmon (6A4) to flesh pink (8A3/9A4) when fresh, buff yellowish (4A4) upon drying. Pileal surface glabrous, concentrically and radially zonate obviously on the dry specimen. Sterile margin distinct, thinner than middle, color is lighter and whiter.

Hyphal structure.— Hyphal system dimitic; generative hyphae with clamps, 2–4.5 μm wide, hyaline, thin-to slightly thick-walled, rarely branched; skeletal hyphae colorless, 2.5–6 μm wide, thick-walled, unbranched. Hyphae in the stipe trama similar to that in the pileal context. IKI–, CB–; tissues unchanged in KOH.

Hymenium — Basidia clavate to cylindrical, with 4 sterigmata and a basal clamp, 23–35 × 4–6 µm, basidioles dominant, in shape similar to basidia, but slightly smaller. Gloeocystidia common, thin walled, cylindrical to subcylindrical, usually swollen distinctly in the middle and with obtuse apex, 25–35 × 6–10 µm; Pilocystidia hyaline, clavate to cylindrical, swollen near the base, apical narrowing, 25–55 × 5–11 µm; Caulocystidia almost cylindrical, more or less constricted, 40–100 × 6–10 µm. Basidiospores ellipsoid to broadly ellipsoid, hyaline, thin-walled, smooth, IKI–, CB–, (4–)4.2–6.5(–7) × 3–4.5(–5) µm, L = 4.98 µm, W = 3.65 µm, Q = 1.63–2.22, Qm = 1.36 ± 0.15 (n = 120/4).

Additional specimens examined.— China. Anhui Province, Hefei, Shushan District, Anhui University , Qingyuan Campus , on the stump of angiosperm, 22 July 2023, AHU 73 ; on the stump of angiosperm, 22 September 2023, AHU 338 , AHU 339 ( AHUBM) .

Figures

FIGURE 4. Microscopic structures of Podoscypha ahuensis (drawn from the holotype AHU 73). a. Basidiospores. b. Basidia and basidioles. c. Gloeocystidia. d. Pilocystidia. e. Hyphae. f. Caulocystidia. Bars: a–f 10 μm.