Ganoderma luteomarginatum J.D. Zhao, L.W. Hsu & X.Q. Zhang, Acta microbiol. sin
Facesoffungi number: FoF05654
Basidiome annual, stipitate, strongly laccate, corky. Pileus 1.5–5 × 1–3 cm, up to 0.4 cm thick at the base, flabelliform to suborbicular to spathulate, upper surface; reddish black (8E8) to brownish black (6C8), undulate, ferruginous, irregularly ruptured crust overlying the context. Margin; 2mm thick, blunt, yellow (4A8); lower surface greyish brown (6E3). Hymenophore up to 10 mm long, indistinctly stratose; pores initially brown (6E3), bruising dark brown (6F6), pores circular, 3–5 per mm. Context up to 0.8 cm thick, duplex, dry, upper layer dark brown (7F8), fibrous, composed of coarse loose fibrils, corky; lower layer dark brown (7F8), woody. Stipe eccentric, sub cylindrical, concolorous with the pileus, 4 × 8 cm, 0.5 cm at the base. Basidiospores (n = 20) (8.6–)9.6–10.7–11.8(12.1–) × (–6.1)6.3–7.2–8.1(–8.6) μm (Qm = 1.5, Q = 1.3–1.6, with myxosporium). (n = 20) (6.6–)7.9–9.2–10.4(–11.7) × (3.7–)4.6–5.7–6.9(–7.7) μm (Qm = 1.6, Q = 1.3–2.3, without myxosporium), ellipsoid to truncate, truncate at the apex, brown (6E6), with a light brown (6D6) eusporium bearing fine, short and distinct echinulae, overlaid by a hyaline myxosporium. Pileipellis a hymeniderm, brownish orange (6C8), clavate like cells. Context trimitic; generative hyphae (n = 20) (0.4–0.9–1.4) μm in width, thin-walled, hyaline; skeletal hyphae (n = 20) (1.6–2.5–3.2) μm in width, thick walled, nearly solid, sometimes branched, brownish orange (6C8); binding hyphae (n = 20) (2.5–3.9–4.9) μm in width, thick walled, branched, nearly solid, light orange (5A5) to brownish orange (6C8). (Fig. 1)
Habitat – On a rotten hardwood, in dry dipterocarp forest and in upper mixed deciduous forest and growing up from soil.
Specimens examined: LAOS, Sayabouli Province, Paklay District, Nakhan Village, mixed deciduous forest, 18°41′N–101°46′E, elev. 354 m, 25 August 2016, P. Phengsintham (GACP16082545, GACP6082548, GACP16082549) (from Herbarium of Guizhou Agricultural sciences; GAS3356). MYANMAR, 11 September 2014, T.C Wen (GACP140911224).
Notes: Ganoderma luteomarginatum was introduced by Zhao et al. (1979) from China and characterized by strongly laccate, thin, reddish black pileus with yellow margin, small basidiospores (10.7 × 7.2) μm and trimitic hyphal system. The morphology of G. luteomarginatum collections from Laos and Myanmar agree well with that of the holotype as described by Zhao et al. (1979). This species morphologically resembles G. sinense and G. austrofujianense. However, G. sinense can be distinguished by having thick, black pileus with a margin concolourous to the pileus and larger basidiospores, and G. austrofujianense differed by having white and brown color zones in the pileus. Furthermore, this species has been recorded from Thailand and Vietnam (Kha 2014) with morphological evidence. There is no phylogenetic data available for this species in GenBank. Ganoderma luteomarginatum is newly recorded taxa from Laos and Myanmar. (from Hapuarachchi et al. 2019)