Neomensularia duplicata
Neomensularia duplicata F. Wu, L.W. Zhou & Y.C. Dai 2016, in Wu et al., Mycologia, 108(5), 891-898 (2016)
Etymology: Duplicata (L.): referring to the duplex context of the species
Diagnosis: Basidiocarps annual, pileate, usually imbricate, corky and without odor or taste when fresh, hard corky and brittle when dry. Pilei dimidiate to fan-shaped, projecting up to 2 cm, 4 cm wide, and 5 mm thick at base. Pileal surface dark reddish brown, margin buff yellow when fresh, becoming fawn to fuscous upon drying, with distinctly concentric zones in different shades, tomentose to velutinate; margin acute, slightly convex when dry. Pore surface cinnamon-buff to honey-yellow when fresh, becoming dark brown to fuscous upon drying; sterile margin distinct, yellowish brown, up to 1 mm wide; pores circular, 8–10 per mm; dissepiments thick, entire to slightly lacerate. Context dark brown, up to 2 mm thick, duplex, toward the tomentum separated by one black line, lower context hard corky, upper context soft corky. Tubes yellowish brown, distinctly paler than pores and context, up to 3 mm long. Hyphal system dimitic; generative hyphae with simple septa; all hyphae IKI–, CB–; tissue darkening, otherwise unchanged in KOH. Generative hyphae in the lower context hyaline to pale yellowish, thin- to thick-walled, frequently simple septate, occasionally branched, 3–4 µm diam; skeletal hyphae yellowish to golden brown, thick-walled with a narrow to wide lumen, unbranched, interwoven, 3–5 µm diam; hyphae in the black line dark brown, distinctly thick-walled with a narrow lumen, flexuous, strongly agglutinated, 3–5 µm diam.; hyphae in the upper tomentum golden yellow, thick-walled with a wide lumen, unbranched, occasionally simple septate, 3–4.5 µm diam. Hymenophore trama: generative hyphae hyaline to pale yellowish, thin- to slightly thick-walled, frequently simple septate, occasionally branched, 2–3 mm diam; skeletal hyphae dominant, golden yellow to yellowish brown, thick-walled with a narrow lumen, unbranched, non-septate, straight, parallel along the tubes, 2.5–3.5 µm diam. Hymenium: Setae infrequent, subulate to ventricose with a distinct hooked tip, arising from subhymenium, mostly embedded in hymenium, dark brown, thick-walled, 30–40 × 11–15 µm; cystidia absent, fusoid cystidioles occasionally present; basidia more or less barrel shaped, with four sterigmata and a simple septum at the base, 7.5–11 × 4–5 µm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores ellipsoid, golden yellow, thick-walled, smooth, IKI–, CB–, (3–)3.5– 4(–4.5) × 2.5–3(–3.5) µm, L= 3.82 µm, W= 2.9 µm, Q =1.31–1.33 (n = 60/2).
Index Fungorum Number: IF815646
Figure 1. Basidiocarp of Neomensularia duplicata (Dai 13578A).
Figure 2. Micromorphological characters of Neomensularia duplicata (from the holotype). a: Basidiospores. b. Hymenial structure. c. Cystidioles. d. Hymenial setae. d. Hyphae from trama. e. Hyphae from context. Scale bars: a–f 5 5 mm.
Reference:
Wu, F., & Zhou, L. W., & Dai, Y. C. (2016). Neomensularia duplicata gen. et sp. nov. (Hymenochaetales, Basidiomycota) and two new combinations. Mycologia, 108(5), 891-898.
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