Ganoderma wuzhishanensis – Facesoffungi number: FoF 00915

Ganoderma wuzhishanensis T.C. Wen, K. Hapuarachchi & K.D. Hyde

Index Fungorum number: IF 551681 Facesoffungi number: FoF 00915

Etymology: refers to the type collecting site “Wuzshishan Mountain”, Hainan, China

Holotype: GACP14081689

Basidiocarp annual, sessile, woody, Pileus 3–5.5×1–3 cm, up to 1.5 cm thick at the base, suborbicular, planoconvex, sub applante. Upper surface; hard, several layers thick, deep buff (460) to leaf brown (489),crust over lies the pithy context, not cracking, containing fibrous pithy context, strongly laccate, no concentrically sulcate zones, no differentiated zones. radially rugose, margin soft or with numerous undulations and irregularities, 5 mm thick, rounded and concolorous with the pileus. Lower surface light straw (384) basidiospores. Pore surface light straw (384), tubes up to 0.7 mm long in total, middle buff (359) to middle brown (411), pores circular or sub circular or isodiametric. Context up to 1.5 cm thick, dry, triplex, lower layer; golden brown (414), fibrous/pithy, composed of coarse loose fibrils, soft, middle layer; red oxide (446), upper layer: dark camouflage red (436), woody, not cracking, composed of tightly interwoven, finer fibrils, dulling when cut, trimitic hyphal system, generative hyphae; 0.8 –2(– 3) μm (x =1.4,n=30) in width, thin walled, colourless, hyaline, Skeletal hyphae; (–2)3–3.5(–4) μm (x = 3, n=40) in width, golden brown (414) to light brown (320) in 5 % KOH, dextrinoid, thick walled, ligative hyphae; (–0.5)1– 2(– 3)μm(x =1.8,n=40) in width, dark camouflage red(436,) to Light brown (320), thick walled, branched, intertwined the skeletal hyphae. Basidiospores 7–9( –10)×(–3)4–6μm (x =8.4×5, n=30, Q=1.3–2.7, Q=1.7, with myxosporium). 5– 7( –8)×(–2)3–4μm (x =6.2×3.3, n=30, Q=1.43– 3.18, Q=1.99, without myxosporium), elongate, dark camouflage red (436) to Light brown (320), eusporium bearing fine, short and distinct echinulae, overlaid by a hyaline myxosporium, bitunicate. Cuticle hymeniodermiformic, light brown (320), composed of apically acanthus like branched cells, dextrinoid.

Habitat and distribution: On a decaying wood log, accompanied in humus rich soil with over heavily rotted litter in forest,mossy coniferous forests, producing basidiomata from late summer to late autumn, only found in Hainan Province, China.

Material examined: CHINA, Hainan Province, Wuzhishan Mountain, Coniferous rain forest, 18°″N109″E,elev.1350m, 16 August 2014, collector T.C Wen, (GACP14081689, holotype).

Notes: Ganoderma wuzhishanensis is a new member of genus Ganoderma and it clustered with G. multipileum Hou, which is characterized by two kinds of pilei, one from the stalk with some of the stipes and pilei growing together, and the other growing from the lower pilei; a thin crust, composed of enlarged and bulbous ends of hyphae, 16.5×2– 6μm; and basidiospores 8–9×4μm, ovoid, truncate, with numerous and minute echinulae 4–6μm (Wang et al. 2009a). Ganoderma wuzhishanensis is morphologically similar to Ganoderma tropicum (Jungh.) Bres. which is characterized by its laccate surface, large spores (distinctly larger than for most species in the G. lucidum–complex), 11–14×7.5–10μm and the slightly small pileus size, deep buff (460) to leaf brown (489) pileus colour, grow as invidual but live as a group, without concentrically sulcate zones, small tube size, triplex context, basidiospores 7–9×4–6μm, elongate, dark camouflage red (436) to light brown (320) and bitunicate. The species is currently only known from the type locality, Wuzshishan Mountain, Hainan, China.