Thysanorea uniseptata
Thysanorea uniseptata N.G. Liu & K.D. Hyde, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [95] (2019)
Index Fungorum number: IF555387 Facesoffungi number: FoF04949
Sexual morph: Undetermined. Asexual morph: Colonies on natural substrate effuse, scattered, velvety, dark brown to black, with greyish white, glistening heads of conidia at apex. Mycelium partly immersed, partly superficial, composed of pale brown to brown, branched, septate, smooth hyphae. Conidiophores up to 310 µm long, 5.5–8 µm wide at base, 3–5 µm wide in upper half, macronematous, mononematous, branched at apex, erect, straight or broadly curved, septate, constricted at septa near apex, not constricted at septa below, thick-walled, smooth-walled, brown below, paler towards apex. Conidiogenous cells 6–11.5 × 2–4 µm (x̄ = 8.9 × 3.2 µm, n = 15), polyblastic, terminal or intercalary at main stem and fertile branches, hyaline or subhyaline, urniform, conidiogenous loci obvious. Conidia 6.5–9 µm long, 2–3 µm wide at the septum (x̄ = 7.6 × 2.5 µm, n = 30), acropleurogenous, solitary, pyriform, hyaline and aseptate when young, subhyaline, (0–)1-septate when mature, not constricted at the septa, broadly round at the apex, attenuate and narrowly truncate at the base, with darkened hilum, smooth-walled.
Culture characteristics: Conidia germinated on water agar within 24 h. Germ tubes produced from one or both ends of conidium. Colonies growing on PDA circular, edge entire, with umbonate surface, greyish brown to brown from above, dark brown from reverse, mycelium dense, fluffy.
Host and Habitat: Saprobic on submerged wood in a freshwater stream.
Known distribution: Thailand.
Material examined: THAILAND, Chiang Rai Province, Muang District, Ban Nang Lae Nai, on decaying wood submerged in a freshwater stream, 6 March 2018, N.G. Liu, CR067 (MFLU 18-1723, holotype), ex-type living culture (MFLUCC 18-0701).
GenBank Accession No: ITS: MH883033, LSU: MH883031, SSU: MH883049.
Figure X. Thysanorea uniseptata (MFLU 18-1723, holotype). a, b Colonies on natural substrate. c Conidiophore with conidia. d, e Conidiogenous cells with conidia. f Conidia. g Geminated conidium. h, i Colony on PDA (h from above view, i from below view). Scale bars: a = 250 µm, b = 100 µm, c = 50 µm, d, e = 10 µm, f, g = 5 µm.
Notes: Thysanorea uniseptata resembles T. aquatica and T. papuana in having obvious denticle-like conidiogenous loci and pyriform, (0–)1-septate conidia. However, conidia of T. aquatica have prominent guttules and are constricted at septa, features that distinguish it from T. uniseptata. Thysanorea uniseptata differs from T. papuana in having hyaline or subhyaline conidiogenous cells, while the latter are golden to dark brown. Moreover, T. uniseptata has smaller conidiogenous cells and larger conidia than those of T. papuana (6–11.5 vs 5–20 µm long and 6.5–9 vs 5–6 µm long). Phylogenetic analysis showed that T. uniseptata is phylogenetically distinct from T. aquatica and T. papuana.
Reference:
1. Hyde KD, Tennakoon DS, Jeewon R, Bhat DJ et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Divers. 96: 1–242.
Recent Genus
AmphisphaeriaParaeutypella
Halorosellinia
Recent Species
Torula chromolaenaePericonia delonicis
Neopestalotiopsis theobromicola