Oligoporus podocarpi 2021

Oligoporus podocarpi Y.C. Dai, Chao G. Wang & Yuan Yuan, sp. nov. 2021

MycoBank No: 839360

Holotype: China. Hainan, Changjiang, Hainan Tropical Rainforest National Park, Bawangling, rotten wood of Podocarpus imbricatus, 10.XI.2020, Yu-Cheng Dai leg., Dai 22042 (holotype BJFC035938).

Morphological description

Sexual morph: Fruiting body. Basidiocarps annual, resupinate, adnate, soft corky, with mush room odour when fresh, becoming rigid when dry, mild taste, up to 3 cm long, 2 cm wide and 2.3 mm thick at the centre. Pore surface snow white when fresh, becoming cream to buff upon drying, somewhat glancing; sterile margin indistinct, thinning out, up to 0.3 mm wide; pores round to angular, 5–6 per mm; dissepi ments thin, entire. Subiculum white, fibrous to soft corky when dry, up to 0.3 mm thick. Tubes concolorous with the pore surface, hard corky to brittle when dry, up to 2 mm long.

Hyphal structure. Hyphal system monomitic; generative hyphae with clamp con nections, smooth, hyaline, IKI–, CB–; tissues unchanged in KOH.

Subiculum. Generative hyphae thick-walled with a wide lumen, occasionally branched, flexuous, interwoven, 2.5–3.8 μm in diam.

Tubes. Generative hyphae thin- to thick-walled, occasionally branched, subparal lel along the tubes to loosely interwoven, 2–3.1 μm in diam. Cystidia present, ven tricose, very thick-walled, some apically encrusted. Basidia short clavate, sometimes with an intermediate constriction, with four sterigmata and a basal clamp connection, 12.5–16 × 4–5 μm; basidioles in shape similar to basidia, but smaller.

Spores. Basidiospores broadly ellipsoid to reniform, hyaline, thin- to slightly thick-walled, smooth, often with one guttule, dextrinoid, CB+, (3.5–)3.8–4.2( 4.5) × 2–2.3(–2.5) μm, L = 3.98 μm, W = 2.14 μm, Q = 1.82–1.90 (n = 90/3).

Type of rot. Brown rot.

Asexual morph: Undetermined

Culture characteristics:

Habitat:

Distribution: China

GenBank Accession:

ITS MW937877; nLSU MW937884; nuSSU MW937870; mtSSU MW937891; TEF1 MZ082982; RPB2 MZ082976; RPB1 MZ005579

ITS MW937878; nLSU MW937885; nuSSU MW937871; mtSSU MW937892; TEF1 MZ082983; RPB2 MZ082977; RPB1 MZ005580

ITS MW937879; nLSU MW937886; nuSSU MW937872; mtSSU MW937893; TEF1 MZ082984; RPB2 MZ082978; RPB1 MZ005581

Notes:

Reference: Zhou, M., Wang, C. G., Wu, Y. D., Liu, S., & Yuan, Y. (2021).  Two new brown rot polypores from tropical China. MycoKeys, 82, 173.

Figure 5. Basidiocarps of Oligoporus podocarpi (holotype Dai 22042). Scale bar: 1.0 cm. 

Figure 6. Microscopic structures of Oligoporus podocarpi (drawn from the holotype) a basidiospores b Basidia and basidioles c cystidia d hyphae from subiculum e hyphae from trama.