Pseudomonodictys aquatica sp. nov., the sexual morph of Pseudomonodictys from freshwater habitats Author Bao, Dan-Feng 0000-0002-5697-4280 College of Agronomy and Biosciences, Dali University, Dali 671003, Yunnan, P. R. China & Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand & Department of Entomology & Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand & baodanfengfungi @ qq. com; https: // orcid. org / 0000 - 0002 - 5697 - 4280 baodanfengfungi@qq.com Author Hongsanan, Sinang 0000-0003-0550-3152 Department of Entomology & Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand & Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; & Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Sciences, Chiang Mai University, Chiang Mai 50200, Thailand. & sinang 333 @ gmail. com; https: // orcid. org / 0000 - 0003 - 0550 - 3152 sinang333@gmail.com Author Hyde, Kevin D. 0000-0002-2191-0762 Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand & kdhyde 3 @ gmail. com; https: // orcid. org / 0000 - 0002 - 2191 - 0762 kdhyde3@gmail.com Author Luo, Zong-Long 0000-0001-7307-4885 College of Agronomy and Biosciences, Dali University, Dali 671003, Yunnan, P. R. China & luozonglongfungi @ qq. com; https: // orcid. org / 0000 - 0001 - 7307 - 4885 luozonglongfungi@qq.com Author Nalumpang, Sarunya 0000-0001-9105-4466 Department of Entomology & Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand & sarunya. v @ cmu. ac. th; https: // orcid. org / 0000 - 0001 - 9105 - 4466 sarunya.v@cmu.ac.th text Phytotaxa 2022 2022-10-07 567 3 222 232 http://dx.doi.org/10.11646/phytotaxa.567.3.2 journal article 161930 10.11646/phytotaxa.567.3.2 16e1820a-9e78-4c69-a5a3-62417ab67a5b 1179-3163 7156679 Pseudomonodictys aquatica D.F. Bao, K.D. Hyde & Z.L. Luo , sp. nov. FIGURE. 2 Index Fungorum number: IF 559715; Facesoffungi number: FoF 11439 Etymology:—referring to the aquatic habitat of this fungus. Holotype :— MFLU 22–0079 Saprobic on submerged decaying wood. Sexual morph: Ascomata 230–335 µm high, 210–350 µm diam, solitary, scattered, semi-immersed to erumpent, visible as raised, globose to subglobose, black, ostiolate. Ostiole short papillate, with an irregular pore-like opening, brown to dark brown. Peridium composed of several layers of brown to dark brown cells of textura agularis , outer layers merged with the host tissues. Hamathecium composed of 2–3 µm wide, dense, filamentous, branched, septate, hyaline, cellular pseudoparaphyses. Asci (120–)130–161(–180) × 20–23 µm (x̅ = 145.8 × 22.8 µm, n = 30), 8-spored, bitunicate, fissitunicate, clavate, short pedicellate, apically rounded, with an ocular chamber. Ascospores 40–48(–52) × 8–10 µm (x̅ = 44.2 × 8.9 µm, n = 35), overlapping, 2–3-seriate, fusiform to cylindrical with round ends, slightly curved, (6–)8-septate, strongly constricted at the septa, narrow towards the both ends, enlarged at the 4 th and 5 th cells from the apex, smooth-walled, hyaline, with small guttules, surrounded by a distinct, thick, mucilaginous sheath (3–8 µm wide). Asexual morph: Undetermined. Culture characteristics: —Ascospores germinated on PDA within 24 h. Reach 30 mm diam. in 30 days at room temperature, surface rough, with dense mycelia, dry, grey at the margin and center, dark grey to dark brown at the middle from above; grey at the margin and dark brown at middle from below; not producing pigmentation in culture. Material examined: — Thailand , Chiang Rai Province , on decaying wood submerged in a small stream, 7 March 2021 , D. F . Bao , 2 CR 17 ( MFLU 22–0079 , holotype ); ex-type living culture, MFLUCC 22–0018 . Thailand , Chiang Rai Province , on decaying wood submerged in a small stream, 7 March 2021 , D. F . Bao , 2 CR 19 ( KUN-HKAS 124177 , paratype ); living culture, MFLUCC 22–0019 .