Hodophilus pseudoglabripes S. M Tang & S.H. Li, 2023

Tang, Songming, Lv, Tong, He, Jun, Yu, Fengming, Luo, Hongmei & Li, Shuhong, 2023, Hodophilus pseudoglabripes (Clavariaceae, Agaricales), a new species from Thailand, Phytotaxa 597 (3), pp. 219-230 : 224-226

Hodophilus pseudoglabripes S. M Tang & S.H. Li , sp. nov.

( Figs. 2 , 3 )

MycoBank: MB838312

Etymology:—‘pseudoglabripes’ refers to its similarity to H. glabripes .

Holotype:— THAILAND, Chiang Mai Province, Mae Taeng District, Pa Pae Sub-district , 19°14.66’N, 98°38.61’E, 850 m a.s.l., 14 August 2020, collected by Song-Ming Tang ( MFLU21-0005 , holotype!; HKAS110665 isotype!).

Diagnosis:— Hodophilus pseudoglabripes is similar to H. glabripes Ming Zhang, C.Q. Wang & T.H. Li , but can be distinguished by its pileus slightly striated near-margin and flocculose with age, white to the greyish yellow stipe, as well as its smaller basidiomata.

Description: Basidiomata small to medium-sized. Pileus 11–25 mm diam., hemispherical at first, then convex to plano-convex, often with a slight depression at the center, surface smooth when young, becoming slightly striate near margin and flocculose with age, when wet translucently striated halfway to the disc, hygrophanous, white (1A1) to yellowish white (1A2) when young, later greyish yellow (1B4) to light orange (5A5), when dry uniformly pale at center. Pileus context up to 1.5 mm thick, white (1A1). Lamellae number 16–20, white (1A1) when young, light orange (5A5) to greyish orange (5B5) when old, 3–4 mm wide, lamellullae frequent, in (1–) 2 tiers. Stipe 34–64 × 2–3 mm, surface smooth, white (1A1), central, usually flexuous, hollow, and narrowing downwards, becoming greyish yellow (2B3) near the base, hollow when mature. Odor strong earthy.

Basidiospores (103/5/2) (4.0–) 4.3–6.2 (–6.3) × (3.4–) 3.5–5.5 (–5.6) μm, av. 5.2–4.6 μm, Q (length/width) = 1.00–1.44 (–1.57), av. Q=1.14, globose to subglobose, smooth, thin-walled. Basidia 4–spored, (25.0–) 33.0–48.0 × (5.2–) 5.8–7.4 μm, av. 40.1 × 6.5 μm, clavate, hyaline. Basidioles cylindrical to narrowly clavate, obtuse, (28.6–) 30.2–44.3 (–45.2) × (3.8–) 4.2–6.3 (–6.7) μm. Pleurocystidia absent. Pileipellis a hymeniderm to epithelium, hyphal terminations vertically arranged, composed of cells arranged in one or two ranks, terminal cells near the pileus margin obovoid, obpyriform, subglobose, clavate, thin-walled, (18–) 21–51 (–67) × (–15) 16–26 (–34) μm, av. 35 × 20 μm; subterminal cells usually distinctly narrower, cylindrical, some inflated, broadly clavate, ventricose or branched, (18–) 20–46 (–50) × (6–) 8–19 (–23) μm, av. 29–13 μm. Terminal cells near the pileus center similar in shape and size to those near the pileus margin, but usually narrower, (15–) 17–34 (–40) × (–5) 7–14 (–20) μm, av. 23–11 μm, subterminal cells similar to those near the pileus margin, (6–) 7–23 (–34) × (1–) 2–5 (–10) μm, av. 16–6 μm. Caulocystidia without pigments, thin walled, usually densely clustered, flexuous or spirally coiled, clavate and regular, (37–) 33–48 (–50) × (4.7–) 5.8–7.4 (–8.9) μm. Clamp connections absent in all parts.

Ecology and Distribution: Solitary, on soil, in a forest dominated by Castanopsis . Known only from the type locality in Chiang Mai Province, Northern Thailand.

Additional specimen examined: Thailand, Chiang Mai Province, Wat Pah Pa Deng, Mae Taeng District , 14 Aug 2020, Feng-Ming Yu ( MFLU21-0006 ) ; same location, 5 September 2020, Hong-Wei Shen ( HKAS110665 ) ; Chiang Mai Province, Mae Sae Village, Pa Pae Sub-district, Mae Taeng District , 6 September 2020, Hong-Wei Shen ( HKAS110666 ) .

Figures

FIGURE 2. Basidiomata of Hodophilus pseudoglabripes in the field. Mature basidiomata a–f MFLU21–0005. Young basidiomata g–l MFLU21–0006. Bars = 1 cm.

FIGURE 3. Hodophilus pseudoglabripes(MFLU21–0005) a. Hyphal terminations in pileipellis near the pileus margin; b. Hyphal terminations in pileipellis near the pileus centre. c-d. Basidioles. e. Basidiospores; f. Caulocystidia; g. Basidia; h–i. Terminal cells. Scale bars: a–c, f–i = 10 μm; d–e = 5μm.