Parabambusicola aquatica
Parabambusicola aquatica W. Dong, H. Zhang & K.D. Hyde
Index Fungorum Number: IF 557931; Facesoffungi number: FoF 09274
Saprobic on submerged wood in freshwater. Sexual morph: Ascomata 150–180 μm high, 350–400 μm wide, scattered, immersed, with black spot on host surface, flatcone, brown, coriaceous. Peridium 10–25 μm thick at the sides, comprising several layers of brown, thin-walled, large cells of textura angularis, flattened and poorly developed at the base, 10–15 μm thick. Pseudoparaphyses 1.5–2 μm diam., numerous, cellular, hypha-like, hyaline, indistinctly septate, embedded in a gelatinous matrix. Asci 110–175 × 30–37 μm (x̄ = 147 × 34 μm, n = 10), 8-spored, bitunicate, broadly clavate or narrowly ellipsoidal, apically rounded with well-developed ocular chamber. Ascospores 55–60(–67) × 12–17 μm (x̄ = 56 × 14 μm, n = 10), overlapping bi- to tri-seriate, straight or slightly curved, hyaline, 5-septate, clearly shown when old, constricted at the septa, fusiform with rounded ends, with minute guttules thin-walled, smooth, with a globose mucilaginous sheath, 30–50 μm wide. Asexual morph: Undetermined. (Descriptions from Dong et al. 2020)
Material examined: THAILAND, Songkhla Province, on submerged wood in a stream, 10 May 2018, W. Dong, 20180503-1 (MFLU 18-1524, holotype), ex-type living culture MFLUCC 18-1140; ibid., 20180503-2 (HKAS 104993, isotype), ex-type living culture KUMCC 19-0010.
Notes: Parabambusicola aquatica is similar to P. bambusina and P. thysanolaenae in the characters of peridium, asci and ascospores (Tanaka and Harada 2003; Phookamsak et al. 2019). However, P. aquatica has wider asci (110–175 × 30–37 μm vs. 86–150 × 22–30 μm) and ascospores (55–60(–67) × 12–17 μm vs. 42–64.5 × 7–10 μm) than P. bambusina (Tanaka and Harada 2003). Parabambusicola aquatica also has larger ascospores than P. thysanolaenae (55–60(–67) × 12–17 μm vs. 45–55 μm × 7.5–11 μm). They are well separated in our phylogenetic tree. (Notes from Dong et al. 2020)
Freshwater distribution: Thailand (Dong et al. 2020)
Fig. 1 Parabambusicola aquatica (MFLU 18-1524, holotype). a–c Appearance of ascomata immersed in host substrate. d Vertical section of ascoma. e Structure of peridium. f Ascus apex with an ocular chamber. g–j Bitunicate asci. k Pseudoparaphyses. l–p Ascospores. q Ascospore in Indian Ink. r Germinated ascospore. s, t Colony on PDA (up-front, down-reverse). Scale bars: d = 100 μm, e, f, k = 10 μm, g–j, l–p = 20 μm, q, r = 50 μm.
References
Phookamsak R, Hyde KD, Jeewon R, Bhat DJ, Jones EBG, Maharachchikumbura SSN, Raspé O, Karunarathna SC, Wanasinghe DN, Hongsanan S, Doilom M, Tennakoon DS, Machado AR, Firmino AL, Ghosh A, Karunarathna A, Mešić A, Dutta AK, Thongbai B, Devadatha B, Norphanphoun C, Senwanna C, Wei D, Pem D, Ackah FK, Wang G-N, Jiang H-B, Madrid H, Lee HB, Goonasekara ID, Manawasinghe IS, Kušan I, Cano J, Gené J, Li J, Das K, Acharya K, Raj KNA, Latha KPD, Chethana KWT, He M-Q, Dueñas M, Jadan M, Martín MP, Samarakoon MC, Dayarathne MC, Raza M, Park MS, Telleria MT, Chaiwan N, Matočec N, de Silva NI, Pereira OL, Singh PN, Manimohan P, Uniyal P, Shang Q-J, Bhatt RP, Perera RH, Alvarenga RLM, Nogal-Prata S, Singh SK, Vadthanarat S, Oh S-Y, Huang S-K, Rana S, Konta S, Paloi S, Jayasiri SC, Jeon SJ, Mehmood T, Gibertoni TB, Nguyen TTT, Singh U, Thiyagaraja V, Sarma VV, Dong W, Yu X-D, Lu Y-Z, Lim YW, Chen Y, Tkalčec Z, Zhang Z-F, Luo Z-L, Daranagama DA, Thambugala KM, Tibpromma S, Camporesi E, Bulgakov TS, Dissanayake AJ, Senanayake IC, Dai DQ, Tang L-Z, Khan S, Zhang H, Promputtha I, Cai L, Chomnunti P, Zhao R-L, Lumyong S, Boonmee S, Wen T-C, Mortimer PE, Xu JC (2019) Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Diversity 95:1–273
Tanaka K, Harada Y (2003) Pleosporales in Japan (3). The genus Massarina. Mycoscience 44:173–185
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