Phylloporia dependens Y.C. Dai.
Index Fungorum number: IF551014 Facesoffungi number: FoF00556
Basidiocarps perennial, pileate to pendent, corky and without odour or taste when fresh, becoming woody hard up on drying. Pilei projecting up to 5 cm, 4 cm wide and 5 cm thick at base. Pileal surface vinaceous brown to black when fresh and dry, narrowly sulcate, glabrous; margin obtuse, vinaceous brown to brown. Pore surface cream-brown to pale brown when fresh, buff-yellow to cinnamon-buff when dry, more or less glancing; margin buff-yellow, narrow to almost lacking; pores circular or angular, 7–9 per mm; dissepiments thin, entire. Context yellowish-brown to cinnamon, corky, up to 1 mm thick. Tubes cinnamon, slightly darker than pore surface, up to 49 mm long. Hyphal system monomitic; generative hyphae with simple septa; neither amyloid nor dextrinoid, acyanophilous; tissue darkening but otherwise unchanged in KOH. Contextual hyphae pale yellowish brown to yellowish brown, thick-walled with a wide to narrow lumen, occasionally collapsed, rarely branched, regularly arranged, 2.4– 3.1μm diam. Tramal hyphae pale yellowish brown to yellowish brown, thick-walled with a wide to narrow lumen, occasionally branched, straight, subparallel along the tubes, 2– 3μm diam. Setae absent; cystidia absent; cystidioles present, fusoid, hyaline, thin-walled, 9–17×3–4.5μm; basidia more or less barrel-shaped, with four sterigmata and a simple septum at the base, 9–12×4–5μm; basidioles mostly pear-shaped, slightly smaller than basidia. Crystals polyhedric, frequently present among trama and subhymenium. Basidiospores broadly ellipsoid, yellowish, thick-walled, usually collapsed when mature, neither amyloid nor dextrinoid, moderately cyanophilous, 3–3.4×2.7–3 (–3.1) μm, L=3.16μm, W= 2.9μm, Q=1.09 (n=30/1). (Fig. 1–2)
Material examined: CHINA, Yunnan Province, Ruili, Moli Tropical Rainforest, on rotten angiosperm stump, 1 November 2012, Dai 13167 (BJFC013379, holotype; GenBank LSU: KP698746; IFP 019122, isotype).
Notes: Phylloporia verae-crucis (Berk. ex Sacc.) Ryvarden has similar pores (7–9 per mm) to P. dependens, but has larger basidiospores (4–4.5×3–3.5μm). In addition, it lives on ground over buried wood, and occurs in South America. Phylloporia was well studied in China, and 13 species were recorded in the county besides the new species. Phylloporia dependens differs from all the existed species in the genus by its hanging down growing habit. In addition, phylogenetic analysis based on nLSU region indicates that P. dependens belonged to Phylloporia, and occupied a distinct lineage with strong support (96 % BS and 1 BPP). So the morphological and molecular evidence confirmed the placement of the new species.
Fig. 1 Phylogram generated from Maximum Likelihood (RAxML) analysis based on LSU sequence data. Maximum likelihood bootstrap support values greater than 50 % and Bayesian posterior probabilities greater than 0.90 are indicated above the nodes, new species Phylloporia dependens are in blue and species for which obtained sequences are based on type material have names in bold. The tree is rooted with Inonotus hispidus.