Dictyocheirospora aquadulcis
Dictyocheirospora aquadulcis Sorvongxay, S. Boonmee & K.D Hyde
Index Fungorum number: IF556308; Facesoffungi number: FoF05963
Etymology: From the Latin aquadulcis (aqua = water and dulcis = sweet, in reference to its freshwater habitat.
Holotype: MFLU 18-1088
Saprobic on decaying, submerged wood in freshwater. Sexual morph Undetermined. Asexual morph Hyphomycetous. Colonies on natural substrate, superficial, scattered. Mycelium immersed, branched, septate, pale brown, smooth-walled. Conidiomata 117–412 µm diam., slightly, pulvinate, dark brown. Conidiophores micronematous, undifferentiated from vegetative hyphae. Conidiogenous cells, holoblastic, integrated, terminal, pale brown. Conidia 60–80 µm × 17–29 µm (x̄ = 70 × 24 µm, n = 20), solitary, cheiroid, ellipsoid to cylindrical, rounded at the apex, consisting of 7 rows of cells, with each row composed of 11–14 cells, with rows digitate, cylindrical, inwardly curved at apex, arising from a basal cell, euseptate, slightly constricted at septa, brown, smooth-walled. (Description from Hyde et al. 2019)
Culture characteristics: Conidia germinated on WA within 24 h. Colonies on MEA reaching 0.2–0.5 cm diam., in 5 days at 25 °C, with wavy margins, initial white and later becoming gray.
Material examined: THAILAND, Pha Yao Province, on decaying wood, in flowing freshwater stream, 11 September 2017, Saranyaphat Boonmee (PK12), (MFLU 18-1088, holotype), ex-type living culture (MFLUCC 17-2571).
GenBank numbers: ITS: MK634542, LSU: MK634545.
Notes: Dictyocheirospora aquadulcis is similar to D. heptaspora in having the same conidial shape and size. However, it differs in having elongate conidia with 11–14 septa, whereas D. heptaspora has ellipsoidal conidia with 10–11 septa. Phylogenetically, D. aquadulcis clustered with D. heptaspora with moderate bootstrap support (Hyde et al. 2019). We, therefore, introduce D. aquadulcis as a new species in this study based on its morphological distinctness.
Refences
Hyde KD, Tennakoon DS, Jeewon R, Bhat DJ, Maharachchikumbura SSN, Rossi W, Leonardi M, Lee HB, Mun HY, Houbraken J, Nguyen TTT, Jeon SJ, Frisvad JC, Wanasinghe DN, Lücking R, Aptroot A, Cáceres MES, Karunarathna SC, Hongsanan S, Phookamsak R, de Silva NI, Thambugala KM, Jayawardena RS, Senanayake IC, Boonmee S, Chen J, Luo ZL, Phukhamsakda C, Pereira OL, Abreu VP, Rosado AWC, Bart B, Randrianjohany E, Hofstetter V, Gibertoni TB, Soares AMdS, Plautz HL, Sotão HMP, Xavier WKS, Bezerra JDP, de Oliveira TGL, de Souza-Motta CM, Magalhães OMC, Bundhun D, Harishchandra D, Manawasinghe IS, Dong W, Zhang SN, Bao DF, Samarakoon MC, Pem D, Karunarathna A, Lin CG, Yang J, Perera RH, Kumar V, Huang SK, Dayarathne MC, Ekanayaka AH, Jayasiri SC, Xiao Y, Konta S, Niskanen T, Liimatainen K, Dai YC, Ji XH, Tian XM, Mešić A, Singh SK, Phutthacharoen K, Cai L, Sorvongxay T, Thiyagaraja V, Norphanphoun C, Chaiwan N, Lu YZ, Jiang HB, Zhang JF, Abeywickrama PD, Aluthmuhandiram JVS, Brahmanage RS, Zeng M, Chethana T, Wei D, Réblová M, Fournier J, Nekvindová J, do Nascimento Barbosa R, dos Santos JEF, de Oliveira NT, Li GJ, Ertz D, Shang QJ, Phillips AJL, Kuo CH, Camporesi E, Bulgakov TS, Lumyong S, Jones EBG, Chomnunti P, Gentekaki E, Bungartz F, Zeng XY, Fryar S, Tkalčec Z, Liang J, Li G, Wen TC, Singh PN, Gafforov Y, Promputtha I, Yasanthika E, Goonasekara ID, Zhao RL, Zhao Q, Kirk PM, Liu JK, Yan J, Mortimer PE, Xu J, Doilom M (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Divers 96:1–242
Fig 1. Dictyocheirospora aquadulcis (MFLU 18–1088, holotype). a, b. Colonies on host surface, c. Colony of conidia, d–m. Conidium arms, n. Germinating conidium, o, p. Culture on MEA at 3 weeks, q, r. Culture on MEA at 7 months. Scale bars: a, b = 200 µm, c = 100 µm, e–m = 50 µm, d, n = 20 µm
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