Three new species of Iodosphaeria (Xylariomycetidae): I.chiayiensis, I.jinghongensis and I.thailandica

Lakmali S Dissanayake; Diana S Marasinghe; Milan C Samarakoon; Sajeewa S N Maharachchikumbura; Peter E Mortimer; Kevin D Hyde; Chang-Hsin Kuo; Ji-Chuan Kang

doi:10.3897/mycokeys.86.75801

Three new species of Iodosphaeria (Xylariomycetidae): I.chiayiensis, I.jinghongensis and I.thailandica

MycoKeys. 2022 Jan 7:86:1-17. doi: 10.3897/mycokeys.86.75801. eCollection 2022.

Authors

Lakmali S Dissanayake¹, Diana S Marasinghe^{2

3}, Milan C Samarakoon², Sajeewa S N Maharachchikumbura⁴, Peter E Mortimer⁵, Kevin D Hyde^{2

6}, Chang-Hsin Kuo³, Ji-Chuan Kang¹

Affiliations

¹ Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang 550025, China Guizhou University Guiyang China.
² Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand Mae Fah Luang University Chiang Rai Thailand.
³ Department of Plant Medicine, National Chiayi University, 300 Syuefu Road, Chiayi City 60004, Taiwan Zhongkai University of Agriculture and Engineering Guangzhou China.
⁴ School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, China National Chiayi University Chiayi Taiwan.
⁵ Centre for Mountain Futures (CMF), Kunming Institute of Botany, Honghe County 654400, Yunnan, China University of Electronic Science and Technology of China Chengdu China.
⁶ Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China Kunming Institute of Botany Yunnan China.

Abstract

Three fungal specimens (two sexual and one asexual) were collected during fieldwork conducted in China, Taiwan and Thailand. Both sexual morphs share superficial, black ascomata surrounded by flexuous setae; 8-spored, unitunicate, cylindrical asci, with J+, apical ring, and ellipsoidal to allantoid, aseptate, guttulate ascospores. The asexual morph has ceratosporium-like conidia arising from aerial hyphae with a single arm and are usually attached or with 2-3 arms, brown, often with a subglobose to conical cell at the point of attachment. Morphological examinations and phylogenetic analyses of a combined LSU-ITS dataset via maximum likelihood and Bayesian analyses indicated that these three collections were new species. Iodosphaeriachiayiensis (sexual morph), I.thailandica (sexual morph) and I.jinghongensis (asexual morph) are therefore introduced as new species in this study. Iodosphaeriachiayiensis has small, hyaline and ellipsoidal to allantoid ascospores, while I.thailandica has large ascomata, cylindrical to allantoid asci and hyaline to pale brown ascospores.

Keywords: Ceratosporium-like asexual morph; Sordariomycetes; taxonomy; three new taxa.

Lakmali S. Dissanayake, Diana S. Marasinghe, Milan C. Samarakoon, Sajeewa S.N. Maharachchikumbura, Peter E. Mortimer, Kevin D. Hyde, Chang-Hsin Kuo, Ji-Chuan Kang.