Periconia aquatica Z.L. Luo, Hong Y. Su & K.D. Hyde
Index Fungorum number: IF552828; Facesoffungi number: FoF 02941
Etymology: with reference to the habitats of this fungus
Holotype: HKAS 92754
Saprobic on submerged decaying wood. Sexual morph Undetermined. Asexual morph Colonies on the substratum superficial, numerous, effuse, dark brown to black, floccose. Mycelium partly superficial, composed of septate, hyaline hyphae. Conidiophores macronematous, mononematous, unbranched, erect, straight or slightly flexuous, single, septate, brown to dark brown, 370–454 μm (x̅ = 412 μm, SD = 42 μm, n = 10) long, 8.5–11.5 μm (x̅ = 10 μm, SD = 1.5 μm, n = 10) wide, the apex forming sphaerical heads. Conidiogenous cells monoblastic, terminal. Conidia solitary, oval to subglobose, pale brown to brown, minutely verruculose to shortly echinulate, with two sphaerical guttules in conidia, 10–12 μm (x̅ = 11 μm, SD = 1 μm, n = 20) long, 6–7 μm (x̅ = 6.5 μm, SD = 0.5 μm, n = 20) wide. (Descriptions from Hyde et al. 2017)
Material examined: CHINA, Yunnan Province, saprobic on submerged decaying wood in Nujiang River, 3 May 2015, X.C. Tao, N7–4–1 (HKAS 92754, holotype), ex-type living culture MFLUCC 16-0912.
Notes: Periconia aquatica was collected from northwestern Yunnan Province on submerged wood in the Nujiang River when we carried out an investigation of lignicolous freshwater fungi in Yunnan (Hyde et al. 2016). Periconia aquatica is morphologically similar to Periconia submersa but differs in having larger conidia (10–12 9 6–7 μm vs 6.5–9.5 9 4.5–5.5 μm) and conidia of P. submersa lack sphaerical guttules. Most of Periconia species have sphaerical conidia, but P. aquatica has oval to subglobose conidia with guttules. The phylogenetic analysis showed that Periconia aquatica clusters with P. submersa in a strongly supported monophyletic clade (98%ML, 98%MP, 1.00 PP), and these two species are basal to other species of this genus.
Freshwater distribution: China (Hyde et al. 2017)
Fig. 1 Periconia aquatica (HKAS 92754, holotype). a Colonies on the substratum. b Conidiophores with conidia on the substratum. c, d Conidiophores with conidia. e–n Conidia. o Germinating conidium. Scale bars c = 150 μm, d = 50 μm, e–l = 15 μm, o = 25 μm. (Hyde et al. 2017)
Hyde KD, Norphanphoun C, Abreu VP, Bazzicalupo A, Thilini Chethana KW, Clericuzio M, Dayarathne MC, Dissanayake AJ, Ekanayaka AH, He MQ, Hongsanan S, Huang SK, Jayasiri SC, Jayawardena RS, Karunarathna A, Konta S, Kušan I, Lee H, Li J, Lin CG, Liu NG, Lu YZ, Luo ZL, Manawasinghe IS, Mapook A, Perera RH, Phookamsak R, Phukhamsakda C, Siedlecki I, Soares AM, Tennakoon DS, Tian Q, Tibpromma S, Wanasinghe DN, Xiao YP, Yang J, Zeng XY, Abdel-Aziz FA, Li WJ, Senanayake IC, Shang QJ, Daranagama DA, de Silva NI, Thambugala KM, Abdel-Wahab MA, Bahkali AH, Berbee ML, Boonmee S, Bhat DJ, Bulgakov TS, Buyck B, Camporesi E, Castañeda-Ruiz RF, Chomnunti P, Doilom M, Dovana F, Gibertoni TB, Jadan M, Jeewon R, Jones EBG, Kang JC, Karunarathna SC, Lim YW, Liu JK, Liu ZY, Plautz HL, Lumyong S, Maharachchikumbura SSN, Matočec N, McKenzie EHC, Mešić A, Miller D, Pawłowska J, Pereira OL, Promputtha I, Romero AI, Ryvarden L, Su HY, Suetrong S, Tkalčec Z, Vizzini A, Wen TC, Wisitrassameewong K, Wrzosek M, Xu JC, Zhao Q, Zhao RL, Mortimer PE (2017) Fungal diversity notes 603–708: taxonomic and phylogenetic notes on genera and species. Fungal Divers 87:1–235. https://doi.org/10.1007/s13225-017-0391-3