Crepidotus lateralipes E. Horak

Phonemany, Monthien, Sysouphanthong, Phonguen & Thongklang, Naritsada, 2024, Additions to Crepidotus species (Basidiomycota): Six new species and two new records from Thailand, Phytotaxa 646 (2), pp. 91-115 : 101-102

Crepidotus lateralipes E. Horak , CBS Biodiversity Series 16: 32 (2018). ( Figures 6–7 )

Faces of fungi number: FoF 15098, Mycobank number: 820577.

Description: Basidiomata pleurotoid, small to medium. Pileus 20–48 × 20–30 mm; flesh, hygrophanous, dimidate, flabelliform to sub- flabelliform, with incurved margin and straight when mature; white in the primordia stage, becoming yellowish white (4A2), pale yellow (4A3), yellowish gray (4B2), finally turning orange-white (5A2) when mature; surface smooth, with exceeding margin. Lamellae 2 to 4 mm wide, adnexed, white when young, light brown to brown when old (5D4– 5, 5E 6), crowded, with more than five tiers of lamellulae, smooth edge. Stipe 2 × 1 mm present when young, cylindrical, white, smooth and not present when mature. Context 2–4 mm wide, white, yellowish white (4A2) to pale yellow (4A3). Odor mild. Taste none. Spore print brown (6E5) to cocoa brown (6E6).

Basidiospores [150/3/3] (4.9–)5.5–6.4–7.5(–8.0) × (4.3–)4.5–5.7–6.6(–6.9) µm, Q = (1.02–)1.04–1.13–1.28(–1.3), globose, rough or punctate, thick-walled, light brown (5D4). Basidia (16.7–)16.7–20.8–25.2(–25.3) × (7.1–)7.1– 8.3–10(–10) µm, subclavate to clavate, with 2- to 4-spored, hyaline, smooth, thin-walled. Cheilocystidia absent. Pleurocystidia absent. Hymenophoral trama irregular, with cylindrical hyphae, 7–15 µm wide, hyaline, thin-walled. Pileipellis a cutis composed of cylindrical, and branched hyphae, terminal elements 60–90 × 9–13 µm. Clamp connections present in pileipellis and hymenophoral trama.

Habitat and distribution:—Saprobic on dead wood, scattered or fasciculate by 2–4 basidiomata. It has been found in New Zealand and Thailand (this study).

Additional specimens examined:— THAILAND. Chiang Mai Province, Pha Deng Village, Pa Pae Sub-district, Mare Taeng District, N19°07’14’’, E98°43’53’’, 27 May 2019, Monthien Phonemany (MFLU23-0440).

Figures

FIGURE 6. Basidiomata of Crepidotus lateralipes. a–c MFLU23-0440. Scale bar a–c = 10 mm.

FIGURE 7. Micromorphology of Crepidotus lateralipes, a Basidiospores, b Basidia, c Pileipellis, Scale bar a–d = 10 µm, c = 50 µm.