Punctochaete murina J.H.Dong & C.L.Zhao, 2025

Punctochaete murina J.H.Dong & C.L.Zhao gen. et sp. nov.

MycoBank: MB854045

Figs 2–4 View Fig View Fig View Fig

Diagnosis

Punctochaete murina gen. et sp. nov. is characterized by the membranaceous basidiomata with greyish white, smooth hymenial surface, monomitic hyphal system with clamp connections hyphae and cylindrical to allantoid, slightly curved basidiospores measuring 9–12 × 4.3–5.8 µm.

Etymology

The epithet ‘ murina ’ refers to the murine hymenial surface of the holotype.

Type material

Holotype

CHINA – Yunnan Province • Zhaotong, Wumengshan National Nature Reserve ; 28°03′ N, 104°20′ E; altitude 1500 m a.s.l.; 27 Aug. 2023; CLZhao 32118; on fallen angiosperm branches; GenBank nos:

PP819689 (ITS), PP819701 (nLSU); SWFC [ SWFCF00032118 ].

GoogleMaps

Paratypes

CHINA – Yunnan Province • same data as for holotype; 26 Aug. 2023; CLZhao 31670; on fallen angiosperm branches; GenBank nos: PP819683 (ITS), PP819698 (nLSU); SWFC [ SWFCF00031670 ] GoogleMaps • same data as for preceding; 27 Aug. 2023; CLZhao 31873; on fallen angiosperm branches; GenBank nos: PP819684 (ITS), PP819699 (nLSU); SWFC [ SWFCF00031873 ] GoogleMaps • same data as for preceding; CLZhao 31880; on fallen angiosperm branches; GenBank no.: PP819685 (ITS); SWFC [ SWFCF00031880 ] GoogleMaps • same data as for preceding; CLZhao 31985; on fallen angiosperm branches; GenBank nos: PP819686 (ITS), PP819700 (nLSU); SWFC [ SWFCF00031985 ] GoogleMaps • same data as for preceding; CLZhao 32023; on fallen angiosperm branches; GenBank no.: PP819687 (ITS); SWFC [ SWFCF00032023 ] GoogleMaps • same data as for preceding; CLZhao 32113; on fallen angiosperm branches; GenBank no.: PP819688 (ITS); SWFC [ SWFCF00032113 ] GoogleMaps • same data as for preceding; 28 Aug. 2023; CLZhao 32189; on fallen angiosperm branches; GenBank no.: PP819690 (ITS); SWFC [ SWFCF00032189 ] GoogleMaps • same data as for preceding; CLZhao 32347; on fallen angiosperm branches; GenBank no.: PP819691 (ITS); SWFC [ SWFCF00032347 ] GoogleMaps • same data as for preceding; 29 Aug. 2023; CLZhao 32814; on fallen angiosperm branches; GenBank no.: PP819692 (ITS); SWFC [ SWFCF00032814 ] GoogleMaps • same data as for preceding; 19 Sep. 2023; CLZhao 33101; on fallen angiosperm branches; GenBank no.: PP819693 (ITS); SWFC [ SWFCF00033101 ] GoogleMaps • same data as for preceding; 20 Sep. 2023; CLZhao 33389; on fallen angiosperm branches; GenBank no.: PP819694 (ITS); SWFC [ SWFCF00033389 ] GoogleMaps • same data as for preceding; CLZhao 33403; on fallen angiosperm branches; GenBank no.: PP819695 (ITS); SWFC [ SWFCF00033403 ] GoogleMaps • same data as for preceding; 21 Sep. 2023; CLZhao 33703; on fallen angiosperm branches; GenBank no.: PP819696 (ITS); SWFC [ SWFCF00033703 ] GoogleMaps • same data as for preceding; CLZhao 33789; on fallen angiosperm branches; GenBank no.: PP819697 (ITS); SWFC [ SWFCF00033789 ] GoogleMaps .

Description

Basidiomata annual, resupinate, closely adnate, membranaceous, very hard to separate from substrate, without odor or taste when fresh, becoming furfuraceous upon drying, up to 15 cm long, 3 cm wide, 50–100 µm thick. Hymenial surface smooth, punctate, greyish white when fresh, murine to cream to pale pink upon drying. Sterile margin distinct, greyish white, thinning out, up to 0.5 mm wide.

Hyphal system monomitic, generative hyphae with clamp connections, colorless, thin-walled, branched, interwoven, 1.5–3 µm in diameter; IKI–, CB–, tissues unchanged in KOH. Cystidia numerous, thinwalled, subcylindrical to subclavate with an obtuse apex, occasionally sinuous in the basal position, 20.5– 52.5 × 5–11 µm, with a clamp connection at base; cystidioles absent. Hyphidia arising from generative hyphae, nodulose, frequently branched, colorless, thin-walled, 1–4 μm in diameter. Basidia ellipsoid to ovoid, longitudinally septate, two to four-celled, 10.5–15.5 × 8–11 µm; basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores cylindrical to allantoid, slightly curved, colorless, smooth, thin-walled, with 1–2 oil drops, IKI–, CB–, (8.5–)9–12(–12.5) × (4–)4.3–5.8(–6) µm, L = 10.49 µm, W = 4.96 µm, Q = 2.03–2.19, Q m = 2.13 ± 0.18 (n = 150/5).