Pleosporales » Torulaceae » Dendryphion

Dendryphion submersum

Dendryphion submersum H.Y. Su & K.D. Hyde

Index Fungorum number: IF551827; Facesoffungi number: FoF 01744

Etymology: In reference to the submerged habitat

Holotype: HKAS 83998

 

Sexual morph: Undetermined. Asexual morph: Colonies on the substratum superficial, effuse, gregarious, hairy, brown to dark brown. Mycelium composed of branched, septate, pale brown to brown hyphae. Conidiophores macronematous, mononematous, septate, verrucose, thick-walled, branching simple or penicillate at the tip of primary branches, brown, flexuous, 210–335 μm (x̄ = 272.5 μm, SD = 62.5, n = 20) long, 3.5–4.5 μm (x̄ = 4 μm, SD = 0.5, n = 20) wide. Conidiogenous cells terminal, integrated, pale brown, polytretic. Conidia single, pale olivaceous-brown, dry, verrucose, monilioid, 2–5-septate, constricted at the septa, 15–25 μm (x̄ =20 μm, SD = 5, n = 30) long, 5–7 μm (x̄ = 6 μm, SD = 1, n = 30) wide. Conidial secession schizolytic. (Descriptions from Su et al. 2016)

 

Cultural characteristics: Germination takes place from terminal cells of conidium. Conidia germinating on PDA within 24 h and germ tubes produced from one end. Colonies growing slowly on MEA, reaching 15 mm in 3 weeks at room temperature, effuse, hairy, greyish white to white from above, dark brown in media from below.

 

Material examined: CHINA, Yunnan Province, Dali, Nanjian, saprobic on decaying wood submerged in stream, April 2014, Xiao-Ying Liu, S-065 (HKAS 83998, holotype), ex-type culture, MFLUCC 15–0271, KUMCC; ibid. (DLU-065, isotype)

 

Notes: Dendryphion submersum morphologically shares similarities with the generic type, D. comosum, but is clearly different in the size of the conidiophores (210–335 × 3.5–4.5 μm versus up to 400 × 9–14 μm), and conidia (15–25 × 5–7 versus 9–65 × 5–9 μm) and conidiophore branching, which is also penicillate but at the apex of the primary branches. Based on phylogeny analysis, Dendryphion submersum formed a distinct clade within the generic clade of Dendryphion sister to D. aquaticum and D. nanum. (Su et al. 2016)

 

Fig 1. Dendryphion submersum (HKAS 83998, holotype) a, b Conidiophores, c, d Conidiogenous cells, e-m Conidia, n Germinating conidium, o, p Culture on MEA, o from above, p from below. Scale bars: a = 150 μm, b-d = 50 μm, e-n = 10 μm (Su et al. 2016)

 

References

Su H, Hyde KD, Maharachchikumbura SSN, Ariyawansa HA, Luo Z, Promputtha I, Tian Q, Lin C, Shang Q, Zhao Y, Chai H, Liu X, Bahkali AH, Bhat JD, McKenzie EHC, Zhou D (2016) The families Distoseptisporaceae fam. nov., Kirschsteiniotheliaceae, Sporormiaceae and Torulaceae, with new species from freshwater in Yunnan Province, China. Fungal Divers 80:375–409. https://doi.org/10.1007/s13225-016-0362-0

 

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