Dendryphion fluminicola Z.L. Luo, D.J. Bhat & K.D. Hyde
Index Fungorum number: IF823170; Facesoffungi number: FoF 03763
Etymology: Referring to the fungus living in a stream.
Holotype: MFLU 17–1408.
Saprobic on submerged decaying wood. Sexual morph: Undetermined. Asexual morph: Colonies effuse, scattered, dark brown to black, velvety. Mycelium immersed, composed of branched, septate, smooth, pale brown to brown hyphae. Conidiophores macronematous, mononematous, erect, straight or flexuous, cylindrical, smooth, with thick septa, branched in upper part, dark brown to black in unbranched part, 114–176 μm (x̄ = 145 μm, SD = 31, n = 10) long, 7–10 μm (x̄ = 8.5 μm, SD = 1.5, n = 10) wide, mostly with three primary branches, with branches medium to dark brown and verruculose. Conidiogenous cells polytretic, integrated, terminal and intercalary on branches, clavate, pale brown. Conidia catenate or solitary, dry, almost cylindrical to fusiform, often slightly curved, rounded or flattened at base, rounded above, sometimes branched, 2–6-septate, constricted at septa, pale brown to dark brown, minutely verruculose, central cells wider and darker than end cells, 31–46 μm (x̄ = 38.5 μm, SD = 7.5, n = 30) long, 8–10 μm (x̄ = 9 μm, SD = 1, n = 30) wide. (Description from Su et al. 2018)
Material examined: CHINA, Yunnan Province, submerged decaying wood in a stream in Cangshan Mountain, July 2016, S.M. Tang, 2XP H 2–10–3 (MFLU 17–1408, holotype), ex-type living culture, MFLUCC 17–1689; 2XP H 1–3–2 (MFLU 17–1407), living culture, DLUCC 0849; submerged decaying wood in Lancang River, HL 24–2–2 (MFLU 17–1406, paratype), living culture, KUMCC 15–0321; submerged decaying wood in Jinsha River, JSJ H 6–19–4, living culture, MFLUCC 17–0105, KUMCC 15–0436.
Notes: Dendryphion fluminicola was collected from different sites (Jinsha River, Lancang River and Cangshan Mountain) in northwestern Yunnan Province. Dendryphion fluminicola resembles D. comosum in having macronematous, erect, cylindrical conidiophores with several short branches near the apex and catenate or solitary, septate, pale brown to dark brown, minutely verruculose conidia. However, D. fluminicola differs in having shorter and narrower conidiophores (114–176 × 7–10 vs up to 400 × 9–14 μm) and cylindrical to fusiform, 2–6-septate, shorter conidia (31–46 vs − 65 μm). Dendryphion fluminicola also shares similar characters with D. aquaticum in having macronematous, septate, smooth, erect, cylindrical conidiophores with several short branches near the apex and conidia catenate or solitary, septate, pale brown to dark brown, minutely verruculose. However, D. fluminicola differs in having shorter conidiophores (114–176 vs 250–285 μm) and larger conidia (31–46 × 8–10 vs 22–33 × 6.5–7.5 μm). Phylogenetic analysis also indicates that D. fluminicola is separated from other species of Dendryphion with strong bootstrap support (95% ML/1.00 PP) (Su et al. 2018).
Fig 1. Dendryphion fluminicola (MFLU 17–1408). a, b Colonies on wood, c, d Conidiophore with conidia, e, f Conidiogenesis cells and conidia, g–j Conidia, k Germinating conidium, l, m Colonies on PDA from surface and reverse. Scale bars at c–e 35 μm, f 20 μm, and g–k 15 μm (Su et al. 2018)
Su XJ, Luo ZL, Jeewon R, Bhat DJ, Bao DF, Li WL, Hao YE, Su HY, Hyde KD (2018) Morphology and multigene phylogeny reveal new genus and species of Torulaceae from freshwater habitats in northwestern Yunnan, China. Mycol Prog 17:531–545. https://doi.org/10.1007/s11557-018-1388-3