Cylindroconidiis aquaticus X.D. Yu & H. Zhang, 2018

Yu, Xian-Dong, Dong, Wei, Bhat, D. Jayarama, Boonmee, Saranyaphat, Zhang, Di & Zhang, Huang, 2018, Cylindroconidiis aquaticus gen. et sp. nov., a new lineage of aquatic hyphomycetes in Sclerococcaceae (Eurotiomycetes), Phytotaxa 372 (1), pp. 79-87 : 83

Cylindroconidiis aquaticus X.D. Yu & H. Zhang , sp. nov. FIGURE 2

Index Fungorum number: IF555306, Facesoffungi number: FoF 04856

Etymology: aquaticus is referring to the aquatic habitat.

Holotype: MFLU 11–1070 .

Saprobic on decaying wood submerged in freshwater. Sexual morph: Undetermined. Asexual morph: Colonies superficial, effuse, gregarious, hairy, brown to dark brown. Mycelium partly immersed, composed of septate, pale brown, smooth hyphae. Conidiophores 240–380 μm long (x = 312 μm, n = 20), 6–10 μm wide (x = 7.3 μm, n = 20), macronematous, mononematous, cylindrical, slender, erect, straight or slightly flexuous, smooth, brown to olive gray, paler at apex, unbranched, septate, not constricted at the septa, thin-walled. Conidiogenous cells holoblastic, polyblastic, integrated, determinate, terminal or intercalary, nodose, surrounded by conidia at nodes. Conidia 18–24 × 7.5–9.0 μm (x = 20.6 × 8.3 μm, n = 20), acrogenous and pleurogenic, ellipsoidal to cylindrical, with a truncate, slightly tapering basal end, straight, 1-septate, slightly constricted at septum, subhyaline and guttulate when young, olive gray to brown and without guttules when maturity, solitary, smooth, thin-walled.

Culture characteristics: On PDA colony irregular, reaching 30 mm in 4 weeks at room temperature, dark brown to black from above, dark brown from below, umbonate at surface, rough, dry, edge smooth.

Material examined: THAILAND, Chiang Rai Province, Ban Khun Korn, on decaying wood in freshwater, 26 February 2011, Huang Zhang, e1 (MFLU 11–1070), ex-type living culture, MFLUCC 11–0294.

Figures

FIGURE 2.Cylindroconidiis aquaticus (holotype, MFLU 11–1070) a–j From natural substrate. a, b Colonies. c Conidiophores bearing conidia. d Conidiogenous cells with pleurogenic conidia. e Conidiogenous cells with acrogenous conidia. f–j Conidia. k Germinating conidium. l Colony on PDA (from front). m Colony on PDA (from reverse). n–v From PDA. n Conidiophores bearing conidia. o, r, s Conidiogenous cells with pleurogenic conidia. p, q Conidiogenous cells with acrogenous conidia. t Conidiogenous cells. u–v Conidia. Scale bars: c, n = 50 μm, d, s = 25 μm, e, o, r, t = 20 μm, f–k, p–q, u–v = 10 μm.