Piptoporellus taiwanensis Chia-I Jen, Lean-Teik Ng, Ming-Nan Lai & Hiran Ariyawansa

Jen, Chia-I, Lai, Ming-Nan, Ariyawansa, Hiran A., Bandara, Asanka R. & Ng, Lean-Teik, 2023, Piptoporellus taiwanensis sp. nov. (Polyporales, Fomitopsidaceae) from Taiwan and its phytochemistry, Phytotaxa 625 (3), pp. 289-300 : 295-297

Piptoporellus taiwanensis Chia-I Jen, Lean-Teik Ng, Ming-Nan Lai & Hiran Ariyawansa , sp. nov. ( Figs 2–3 )

MycoBank MB 847120

Type:— TAIWAN. Taiwan: Nantou County, Yuchi Township, Sun Moon Lake , on dead trunk of Limlia uraiana (Hayata) Masam. & Tomiya , 20 July 2016, Ming-Nan Lai (holotype: NTUPPMH 22-006; ex-type culture: NTUPPMCC 22-006)

Etymology:— Based on the country from which the fungus was first collected.

Description:— Basidiocarps annual, pileate, substipitate, imbricate, fragile and light in weight upon drying, strong odour; pileus projecting up to 24 cm, 19 cm wide, 3 cm thick, flabelliform, dimidiate or semicircular, glabrous, undulated, and multilobed or overlapping, upper surface light pink, creamy, honey yellow to orange when young, yellow, orange to brown upon aging, soft without crust, with a few faint concentric brown zones, margin yellow to orange when young, becoming brownish orange to a rusty brown when aging and drying, incurved; pores 2–4 per mm, round to angular or irregular, surface ivory, buff to yellow, tubes up to 2 mm, concolorous with pore surface; context creamy to pale yellow, corky, up to 8 mm thick. Hyphal system dimitic; generative hyphae thin-walled, hyaline, with clamp connections, 2.2–5.6 μm in diameter; skeletal hyphae thick-walled, hyaline, aseptate, flexuous, rarely branched, interwoven, occasionally with a distinctly narrow lumen, 2.8–10.4 μm in diameter. Basidia clavate, bearing 4 sterigmata, 13.4–23.4 × 3.3–5.3 μm; basidioles in shape similar to basidia but distinctly smaller, 8.3–18.1 × 3.0–5.0 μm. Basidiospores cylindrical to oblong ellipsoid, slightly apiculated, thin-walled, hyaline, smooth, 4.1–7.4 × 2.6–4.1 μm.

Note:— The general morphology of Piptoporellus taiwanensis fits well with generic characters of the genus Piptoporellus in having annual, pileate, or stipitate basidiomata, similar pileus colouration, a dimitic hyphal system, thin-walled basidiospores, and presence of clamp connections ( Han et al. 2016). However, P. taiwanensis is easily distinguished from the phylogenetically closely related species P. triqueter , having larger basidiospores (4–7 × 2–4 μm versus 4–6 × 2–3 μm) and found in a different geographical location ( Taiwan versus China). Piptoporellus taiwanensis can be separated from P. baudonii , which has larger basidiospores (6–7 × 3.5–4.0 μm) and is known from Africa and Madagascar.

Phytochemical contents

The phytochemical contents of P. taiwanensis fruiting bodies are presented in Table 3 .

Figures

FIGURE 2. Basidiocarps of Piptoporellus taiwanensis. a. P. taiwanensis growing on the tree. b. Lower surface of the pileus. c. Upper surface of the pileus. d. Enlarged view of pores (2×).

FIGURE 3. Microscopic structures of Piptoporellus taiwanensis. a. Basidiospores. b. Basidioles. c. Basidia. d. Clamp connections. e. Hyphae from context. f. Hyphae from trama. Bars: a–f = 10 μm.