Fulvifomes parviungulatus X.H. Ji & Y. Chen

Ji, Xiao-Hong, He, Gang, Sun, Qi-Biao & Chen, Ye, 2024, Fulvifomes parviungulatus (Hymenochaetales, Basidiomycota), a new species from China based on morphological and molecular evidence, Phytotaxa 641 (3), pp. 219-227 : 223-225

Fulvifomes parviungulatus X.H. Ji & Y. Chen , sp. nov. ( Figs. 2 , 3 )

MycoBank no.: MB 842317

Diagnosis:—Differs from other Fulvifomes species by the combination of perennial, small and ungulate basidiocarps, crusted pileal surface, large pores (4–5 pores per mm), a dimitic hyphal system and ellipsoid basidiospores measuring 4.2–4.7 × 3.5–4 μm.

Type:— CHINA. Yunnan Province: Guangnan County, Babao Town , on the dead angiosperm tree, 19 January 2019, CLZhao 11692 (Holotype SWFC!) .

Etymology:—the specific epithet “ Parviungulatus” (Lat.): referring to the small and ungulate pilei.

Description: —Basidiomata perennial, pileate, woody hard and without odour or taste when fresh, light in weight when dry. Pilei ungulate, projecting up to 8 cm, 6 cm wide and 2.5 cm thick at base. Pileal surface greyish dark, greyish brown near the margin, crusted, partly velutinate near the margin, otherwise glabrous, slightly cracked with age. Pore surface brown; sterile margin distinct, buff, up to 2 mm wide; pores circular, 4–5 per mm; dissepiments thick, entire. Context greyish brown, woody hard, up to 2 cm thick. Tubes brown, paler than pore surface, woody hard, up to 0.5 cm long. Hyphal system dimitic; generative hyphae simple septate; skeletal hyphae dominant; tissue darkening but otherwise unchanged in KOH.

Context: Generative hyphae yellowish, slightly thick-walled, occasionally branched, frequently simple septate, 2.5–4 µm in diam; skeletal hyphae dominant, pale yellow to brown, thick-walled with a wide lumen, unbranched, aseptate, regularly arranged, 3–5 µm in diam.

Tubes: Generative hyphae hyaline to pale yellow, thin- to slightly thick-walled, rarely branched, occasionally simple septate, 1.5–3 mm in diam; skeletal hyphae dominant, pale yellow, thick-walled with a wide to narrow lumen, unbranched, aseptate, interwoven, 2–4 mm in diam. Setae or setal hyphae absent; hymenium collapsed in the studied material, basidia and basidioles not seen. Basidiospores ellipsoid, yellowish brown, thick-walled, smooth, IKI–, CB–, (3.9–)4.2–4.7(–5) × (3.2–)3.5–4(–4.5) μm, L = 4.5 μm, W = 3.8 μm, Q = 1.1–1.21 (n = 60/2).

Additional specimen (paratype) examined:— CHINA. Yunnan Province: Guangnan County, Babao Town, on the angiosperm tree, 19 January 2019, CLZhao 11658 (SWFC!).

Figures

FIGURE 2. A fresh basidiocarp of Fulvifomes parviungulatus (Holotype). Scale bar = 1 cm.

FIGURE 3. Microscopic structures of Fulvifomes parviungulatus (Holotype). a Basidiospores; b Hyphae from trama; c Hyphae from context. Scale bars = 10 μm.