Femsjonia monospora Ekanayaka, S.C. Karunarathna, Q. Zhao & K.D. Hyde

Index Fungorum number: IF552550 Facesoffungi number: FoF 2697

Etymology: Name reflects the aseptate basidiospores.

Holotype: MFLU 16-0608

Saprobic on wood, stems and twigs. Basidiomata superficial, gregarious, discoid, sessile, bright yellow, orange near the base, sterile surface rough tomentose, whitish at the margins of the hymenial surface. Hymenium yellow. Internal hyphae branched, thin-walled, septate, hyaline, loosely packed. Probasidia 100–150 × 7–10 µm ( = 139.6 × 8.2 µm, n = 20) cylindrical, yellow, thin-walled, becoming bifurcate. Basidiospores 25–30 × 10–15 µm ( = 28.5 × 12.5 µm, n = 20), subglobose, guttulate, aseptate, yellowish, smooth-walled.

Material examined: CHINA, Yunnan province, Kunming, 10 November 2015, S. C. Karunarathna (NB130), (MFLU 16-0608, holotype). GenBank number ITS:KY498588.

Notes: Femsjonia monospora distinct from all the other species in the genus by having larger probasidia and aseptate, guttulate basidiospores (McNabb 1965; Liu et al. 1988; Shirouzu et al. 2009). The phylogenetic comparisons among Femsjonia species are not possible due to the lack of sequence data.

The best scoring RAxML maximum likelihood phylogenetic tree based on a combined ITS and SSU sequence dataset. Strain/culture numbers are given following the taxon names. The newly generated sequences are in blue. Bootstrap support values for maximum likelihood >60% are given near the nodes. The tree is rooted with Exidia uvapsassa (AFTOL ID 461).


Morphology of Femsjonia monospora (MFLU 16-0608, holotype). a Basidiomata on wood. b Cross section of basidiome. c, d Probasidia. e, f Developing basidia. g, h Immature and mature basidia. Scale bars: b = 100 µm, c, d = 50 µm, e = 25 µm, f-h = 30 µm.