Fuscoporia marquesiana Gibertoni & C.R.S. de Lira, sp. nov.

Index Fungorum number: IF 825746; MycoBank number: MB 825476; Facesoffungi number: FoF 05766; Fig. 1

Etymology – In honour of the late Marcos Marques, a young and remarkable Brazilian mycologist.

Holotype – URM 83094.

Basidiomata annual to perennial, pileate, sessile, applanate, widely attached, rarely effused-reflexed, semicircular, 8–17 cm long, 4–10 cm wide, 0.1–1.2 cm thick, woody hard in thick specimens and coriaceous in thin ones when dried. Upper surface light to dark brown (12 fulvous to 16 cigar brown), glabrous, sulcate in concentric and narrow zones, rarely 2 zonate. Margin acute, rarely obtuse, entire, concolorous with upper surface. Context homogeneous, light brown (12 fulvous), 0.1–0.2 cm at the middle of basidiomata. Pores tiny, almost invisible to the naked eye, circular, 8–9 per mm, dark brown (17 snuff brown), dissepiments entire, thick, tubes light brown (12 fulvous), 0.1–1 cm. Basidiospores broadly ellipsoid, thin-walled, hyaline to pale golden yellow, 4–6×3–4 µm (L=4.95 µm, W=3.85 µm, Q = 1.29 µm), IKI–. Basidia clavate, hyaline, thin-walled, 9–10×4–5 µm. Hyphal system dimitic, generative hyphae hyaline, narrow, thin-walled and simple-septate, 2–2.5 µm wide; skeletal hyphae dominating the context and dissepiments, yellow to brownish, thick-walled, 2–3 µm wide. Hymenial setae lanceolate to ventricose, thick-walled, apex acuminate or hooked, brown, 20–30×5–11 µm (L=26.27 µm, W=8 µm, setal index=3.28 µm).

Material examined – BRAZIL, Bahia, Santa Teresinha, Serra da Jibóia, 22 September 2010, T.B. Gibertoni 19 (URM 83094 as F. senex).

GenBank numbers – ITS: MH392544; LSU: MH407343.

Notes – Fuscoporia marquesiana is characterized by the robust, concentrically zoned basidiomata, and usually hooked setae. It matches the description of F. wahlbergii (Fr.) T. Wagner & M. Fisch. (Ryvarden and Johansen 1980), a species described from South Africa (originally Natal, currently KwaZulu-Natal) (type not located: no answer from UPS). However, the images of Pyropolyporus robinsoniae Murrill (NY 743008), a neotropical synonym of F. wahlbergii, reveal macromorphological differences. Additionally, F. marquesiana has only 97% identity with the only sequence of F. wahlbergii available (AF311045, LSU, no answer from REG). This sequence, furthermore, is from material collected in Spain (Canary Islands).

Figure 1 – Fuscoporia marquesiana (URM 83094, holotype). a Abhymenial surface. b Hymenial surface. c Setae. d Basidiospores. Photos: R.L. Alvarenga. Scale bars: a=1 cm, b=1 cm, c=10 μm, d=5 μm