Skeletocutis lepida A. Korhonen & Miettinen

Korhonen, Aku, Seelan, Jaya Seelan Sathiya & Miettinen, Otto, 2018, Cryptic species diversity in polypores: the Skeletocutisnivea species complex, MycoKeys 36, pp. 45-82 : 45

Skeletocutis lepida A. Korhonen & Miettinen sp. nov. Figure 6A

Holotype.

Japan. Kansai Reg.: Shiga Prefecture, Otsu, indet. angiosperm wood, 7 Nov 2013 Schigel 7684 & Nakamori, Tanaka, Nakano (H 7008661, isotype TFM).

Description.

Basidiocarps annual; half-resupinate; pilei up to 3 cm wide, nodulous or up to 4 mm thick and fleshy, blunt edged; upper surface slightly rough, matted, white to cream coloured when young, turning ochraceous; context faintly zonate in longitudinal section with thin dark lines separating layers of growth; tube layer up to 1 mm thick; pores (7 –)8–9(– 10) per mm.

Hyphal structure: skeletal hyphae in context / subiculum (1.0 –)2.0–3.3(– 4.0) µm wide, in trama (1.0 –)2.0–3.5(– 4.9) µm wide, generative hyphae in trama 1.0 –2.2(– 3.0) µm wide.

Basidiospores See general description of microscopic structures; (2.8 –)2.9–3.0(–3.1)×0.5– 0.6 µm, L=2.95 µm, W=0.55 µm, Q’=4.8– 6.0, Q=5.36, n=90/3.

Distribution and ecology.

Available material is limited but suggests a temperate East Asian distribution. Russian specimens represent rather small basidiocarps that were collected from thin, fallen angiosperm branches. The holotype from Japan is a sturdier basidiocarp that was probably growing on a thick branch or a log.

Etymology.

Lepidus (Lat.), charming, nice, elegant.

Specimens examined.

JAPAN. Kansai Reg.: (holotype, see above). RUSSIA. Khabarovsk Reg.: Khabarovsk Dist., Malyi Niran, Tilia amurensis , 7 Aug 2012 Spirin 4989 (H); Solnechny Dist., Boktor, Quercus mongolica , 8 Aug 2011 Spirin 3964 (H).