Neoroussoella peltophora P. Pasouvang & R.S. Jayawardena

Pasouvang, Pahoua, Karunarathna, Anuruddha, Silva, Nimali Indeewari De, Sibounnavong, Phoutthasone, Zhao, Haijun, Luo, Mei & Jayawardena, Ruvishika S., 2022, A new species of Neoroussoella peltophora in Roussoellaceae, from Thailand, Phytotaxa 531 (3), pp. 282-292 : 286

Neoroussoella peltophora P. Pasouvang & R.S. Jayawardena ( FIGURE 1 )

Index Fungorum number: IF 558564; Faces of fungi number: FoF 09995

Etymology:—The specific epithet reflects the generic name of the host Peltophorum vogelianum (Fabaceae)

Holotype:— MFLU 21–0113

Saprobic on dead twigs of Peltophorum vogelianum (Miq) Kurz. Sexual morph: undetermined. Asexual morph: Coelomycetous. Conidiomata 165–224 µm diam × 144–178 µm high (= 197 × 160 µm, n = 20), scattered to gregarious, erumpent, globose to sub-globose, coriaceous dark brown to black, surrounded by dark brown parenchymatous cells. Ostiole papillate, central, circular. Conidiomata wall 9–12 µm wide, composed of thick-walled, dark brown cells of textura angularis; inner layer thin, hyaline. Conidiophores usually reduced to conidiogenous cells. Conidiogenous cells 1–3.5 × 6.5–8 µm (= 2.2 × 7.2 µm, n = 55), phialidic, ampulliform to cylindrical, hyaline, smooth-walled. Conidia 2.0–3.0 × 3.0–4.0 μm (= 1.9 × 3.7 μm, n = 55), initially hyaline, becoming pale brown when mature, oblong to ovoid, straight, both ends broadly rounded, aseptate with two guttules, smooth-walled.

Culture characteristics: Conidia germinated on PDA within 24 hr. Colonies on PDA reaching 5.7 mm diam after 3 weeks at 20–25 °C, colonies medium sparse, circular, flat, surface slightly rough with edge entire, margin well-defined, cottony to fairly fury, colony from above dark brown three clearly visible layers.

Material examined: THAILAND, Chiang Rai Province, Mueang District, Mae Fah Luang University on dead twigs of Peltophorum vogelianum (Fabaceae) , 26th June 2020, P. Pasouvang, PS-81 (MFLU 21–0113, holotye), extype living culture (MFLUCC 21–0071).

Figures

FIGURE 1. Maximum likelihood tree based on a combined dataset of LSU, SSU, ITS, tef1-α and rpb2 sequence data. Bootstrap support values for ML equal to or greater than 70% and Bayesian posterior probabilities equal to or greater than 0.95 are displayed on the nodes, respectively. Newly introduced taxon is indicated in red. The tree is rooted with Occultibambusa bambusae (MFLUCC 11–0394) and O. bambusae (MFLUCC 13–0855). Type and ex-type strains are in black bold.