Phaeoacremonium aquaticum (Hu et al.) Gramaje et al.: Togninia aquatica Hu et al.
Etymology: aquatica, referring to the aquatic habitat of the fungus.
Sexual morph: Ascomata ca. 220–250 µm diam, scattered, submerged, globose, black, coriaceous. Neck up to 1450 µm long, ca. 35 µm diam, one per ascoma, erect or lying on substrata, straight or curved, cylindrical, black. Peridium 10–38 µm thick, comprising 8–10 layers cells of textura angularis, cells of outer layers black-brown to pale brown, inner layers hyaline. Paraphyses hyaline, septate, hypha-like, cylindrical, narrowing toward the tip, thread-like at the apex, longer than asci. Asci 18–21 ´ 4–5 µm, eight-spored, unitunicate, clavate, apex truncate, appearing spicate when mature, apedicellate, with truncate bases. Ascogenous hyphae hyaline, septate, simple, smooth-walled, 2–3 µm at the base. Ascospores 5–6 ´ 1–1.5 µm (x̄ = 5.3 ´ 1.1 µm, n = 30), biseriate, reniform with rounded ends, unicellular, hyaline, thin-walled, smooth-walled, often containing small guttules at the ends.
Distribution: CHINA, Yunnan Province, Jinghong City, Mengla County, on submerged wood in a small stream (Hu et al. 2012).
Notes: Holotype IFRD 023–047. ITS sequence data is available.
Gramaje D, Mostert L, Groenewald JZ, Crous PW. 2015 – Phaeoacremonium: from esca disease to phaeohyphomycosis. Fungal Biology 119, 759–783.
Hu DM, Cai L, Hyde KD (2012c) Three new ascomycetes from freshwater in China. Mycologia 104:1478–1489.
Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.
Huang, SK; Jeewon, R; Hyde, KD; Bhat, DJ; Chomnunti, P; Wen, TC. 2018. Beta-tubulin and Actin gene phylogeny supports Phaeoacremonium ovale as a new species from freshwater habitats in China. Mycokeys. 41:1-15