Kirschsteiniotheliales » Kirschsteiniotheliaceae » Kirschsteiniothelia

Kirschsteiniothelia aquatica

Kirschsteiniothelia aquatica Z.L. Luo, K.D. Hyde & H.Y. Su

Index Fungorum number: IF554783; Facesoffungi number: FoF04690

Holotype: MFLU 18–1077

Etymology: Referring to the aquatic habitat of this fungus

 

Saprobic on submerged decaying wood. Sexual morph: Undetermined. Asexual morph: Colonies effuse on natural substrate, hairy, dark brown. Mycelium partly superficial, partly immersed in the substrate, composed of septate, branched, smooth-walled hyphae. Conidiophores macronematous, mononematous, erect, straight or flexuous, unbranched, thick-walled, dark brown, septate, cylindrical, 114–151 μm (x̄ = 132.5 μm, SD = 18.5, n = 10) long, 7–8 μm (x̄ = 7.5 μm, SD = 0.5, n = 10) wide. Conidiogenous cells monoblastic, holoblastic, integrated, determinate or percurrently proliferating, terminal, dark brown, cylindrical. Conidia acrogenous, solitary, dry, straight or slightly curved, subhyaline and rounded at apex, truncate, thick-walled and dark brown at base, smooth, 35–46 μm (x̄ = 40.5 μm, SD = 5.5, n = 20) long, 7.5–8.5 μm (x̄ = 8 μm, SD = 0.5, n = 20) wide, sometimes percurrently proliferate at broken ends. (Descriptions based on Bao et al. 2018)

 

Material examined: CHINA, Yunnan Province, saprobic on decaying wood submerged in a stream in Cangshan Mountain, July 2015, H.W. Shen, XP H 1–12–1, S–708 (MFLU 18–1077, holotype), ex-type culture, MFLUCC 17–1685.

 

Notes: This fungus was collected from Cangshan Mountain, Yunnan Province, China. Kirschsteiniothelia aquatica resembles K. cangshanensis and K. fluminicola in having macronematous, straight or flexuous, unbranched, thick-walled, septate conidiophores, and solitary, septate, conidia. However, K. aquatica differs from K. cangshanensis in having longer conidiophores (114–151 μm vs 105.5–135.5 μm), and subhyaline, truncate, thick-walled conidia, rounded at apex, and dark brown at base. Kirschsteiniothelia aquatica differs from K. fluminicola in having shorter and thinner conidiophores (114–151 × 7–8 μm vs 209–286 × 7–9 μm). They are also phylogenetically distinct (Bao et al. 2018). (Notes taken from Bao et al. 2018)

 

References

Bao DF, Luo ZL, Liu JK, et al (2018) Lignicolous freshwater fungi in China III: Three new species and a new record of Kirschsteiniothelia from northwestern Yunnan Province. Mycosphere 9:755–768. https://doi.org/10.5943/mycosphere/9/4/4

 

Fig 1. Kirschsteiniothelia aquatica (MFLU 18–1077, holotype). a, b. Colonies on wood. c, d. Conidiophore with conidia. e. Conidiogenous cells and conidia. f–h. conidia. i. Germinating conidium. j, k. Culture on PDA from surface and reverse. Scale bars: c, d = 40 μm, e = 30 μm, f–i = 10 μm. (Bao et al. 2018)

 

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