Trematosphaeria confusa
Trematosphaeria confusa (Garov.) Boise & D. Hawksw.
Basionym: Verrucaria confusa Garov., Tentam. Dispos. Lich. Langob.: 77 (1865)
Synonymy: Didymosphaeria confusa (Garov.) Rehm, Hedwigia 18: 165 (1879)
Index Fungorum number: IF 105837; Facesoffungi number: FoF 08380
Description from Hongsanan et al. (2020) on decaying wood of Rhizophora sp.:
Saprobic on decaying wood of Rhizophora sp. Sexual morph: Ascostromata 600–760 μm wide, 540–570 μm high, solitary, erumpent to superficial, immersed only at the base, carbonaceous, conical, with a flattened base, apex papillate. Hamathecium comprising up to 2.6 μm wide. septate, hyaline, pseudoparaphyses. Asci (130-)170–190(-200) × (15-)16–18(-20) μm, bitunicate, narrowly clavate, short-stalked, rounded at the apex. Ascospores 1–2-seriate, overlapping, (30-)35–37(-39) × (7.5-)8–11(-12) μm, fusiform, hyaline to brown, 3-septate, constricted at the middle septum, slightly pointed at the ends, the second cell slightly swollen, surrounded by a thin mucilaginous sheath. Asexual morph: Undetermined.
Material examined: THAILAND, Ranong Province, Amphoe Maung, Mu 4 Tombol Ngao, Ranong Mangrove Research Center (GPS: 9°43' to 9°57'N; 98°29' to 98°39'E) on decaying wood of Rhizophora sp. (Rhizophoraceae), 7 December 2016, M.C. Dayarathne, MCD 045 (MFLU 18-0532).
Notes: The conical ascostromata and reddish ascospores of this species are characteristic features of Trematosphaeria (Tanaka et al. 2005a). Trematosphaeria confusa was established to include a Trematosphaeria species which comprises three septate ascospores surrounded by a thin mucilaginous sheath. Most species of the genus are saprotrophs or hemibiotrophs of terrestrial woody plants (Boise 1985), while T. confusa is reported from freshwater and terrestrial habitats (Shearer 1993).
Freshwater distribution: Australia (Hyde 1995), Malaysia (Ho et al. 2001)
Fig 1. Trematosphaeria confusa (MFLU 18-0532). a, b Ascomata on decaying wood. c Section of ascoma. d Pseudoparaphyses. e–g Asci. h–j Ascospores. k Germinating ascospore. Scale bars: a = 500 μm, b, c = 200 μm, f = 100 μm, e, g = 50 μm, h–k = 20.
References
Boise JR (1985) An amended description of Trematosphaeria. Mycologia 77:230–237
Hongsanan S, Hyde KD, Phookamsak R, Wanasinghe DN, McKenzie EHC, Sarma V V., Boonmee S, Lücking R, Bhat DJ, Liu NG, Tennakoon DS, Pem D, Karunarathna A, Jiang SH, Jones EBG, Phillips AJL, Manawasinghe IS, Tibpromma S, Jayasiri SC, Sandamali DS, Jayawardena RS, Wijayawardene NN, Ekanayaka AH, Jeewon R, Lu YZ, Dissanayake AJ, Zeng XY, Luo ZL, Tian Q, Phukhamsakda C, Thambugala KM, Dai DQ, Chethana KWT, Samarakoon MC, Ertz D, Bao DF, Doilom M, Liu JK, Pérez-Ortega S, Suija A, Senwanna C, Wijesinghe SN, Konta S, Niranjan M, Zhang SN, Ariyawansa HA, Jiang HB, Zhang JF, Norphanphoun C, de Silva NI, Thiyagaraja V, Zhang H, Bezerra JDP, Miranda-González R, Aptroot A, Kashiwadani H, Harishchandra D, Sérusiaux E, Aluthmuhandiram JVS, Abeywickrama PD, Devadatha B, Wu HX, Moon KH, Gueidan C, Schumm F, Bundhun D, Mapook A, Monkai J, Chomnunti P, Suetrong S, Chaiwan N, Dayarathne MC, Yang J, Rathnayaka AR, Bhunjun CS, Xu JC, Zheng JS, Liu G, Feng Y, Xie N (2020) Refined families of Dothideomycetes: Dothideomycetidae and Pleosporomycetidae. Mycosphere 11:1553–2107. https://doi.org/10.5943/MYCOSPHERE/11/1/13
Hyde KD (1995) Tropical Australian freshwater fungi. VII. New genera and species of Ascomycetes. Nova Hedwigia 61:119–140
Kuo WH, Chen CY, Kuo CH, Goh TK (2018) Some ascomycetes from the Alishan national scenic area, Chiayi county. Taiwan. Nova Hedwig 107:531–542
Shearer CA, Huhndorf SM, Crane JL (1993) Reexamination of eight taxa originally described in Leptosphaeria on members of Asteraceae. Mycologia 85:825–834. https://doi.org/10.1080/00275514.1993.12026339
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