Tubeufiales » Tubeufiaceae » Berkleasmium

Berkleasmium latisporum

Berkleasmium latisporum (Y.Z. Lu, Boonmee & K.D. Hyde) Y.Z. Lu

Basionym: Neoacanthostigma latisporum Y.Z. Lu, Boon- mee & K.D. Hyde, Cryptog. Mycol. 38(2): 184 (2017)

Index Fungorum number: IF 553173; Facesoffungi number: FoF 03242

Etymology: ‘latisporum’ referring to wide helicosporous conidia.

Holotype: MFLU 17-0336

 

Saprobic on submerged wood from freshwater. Sexual morph: Undetermined. Asexual morph: Colonies effuse, brown. Mycelium mostly immersed, composed of branched, septate, brown hyphae. Conidiophores and Conidiogenous cells not observed. Conidia 85–150 μm diam. and conidial filament 5.5–21.5 μm wide (x̄ = 123 × 14 μm, n = 15), 545–865 μm long, coiled 2–3.5 times when tightly coiled, becoming loosely coiled in water, basal cell elongate, rounded at the tip, distinctly multi-septate, pale brown to dark brown, smooth-walled. (Descriptions from Dong et al. 2020)

 

Material examined: THAILAND, Prachuap Khiri Khan Province, on submerged wood in a stream, 30 July 2015, K.D. Hyde, 34C (MFLU 15-2686), living culture MFLUCC 15-0987

 

Notes: Our collection MFLUCC 15-0987 clusters with Berkleasmium latisporum with high bootstrap support (Dong et al. 2020). They have identical LSU and TEF sequence data, which indicates that they are conspecific (Jeewon and Hyde 2016). MFLUCC 15-0987 has larger conidial diam. (85–150 μm vs. 95–120 μm) and wider conidial filament (5.5–21.5 μm vs. 12–14.5 μm) than the holotype of B. latisporum (Lu et al. 2017). (Notes from Dong et al. 2020)

 

Freshwater distribution: Thailand (Lu et al. 2017; Dong et al. 2020)

 

Fig 1. Berkleasmium latisporum (MFLU 15-2686). a Colonies on submerged wood. b–e Conidia. f–i Conidial filament. j Germinated conidium. k, l Colony on PDA (up-front, down-reverse). Scale bars: a = 100 μm, b = 20 μm, c–e = 40 μm, f = 5 μm, g = 2 μm, h, i = 10 μm, j = 50 μm (Dong et al. 2020)

 

References

Dong W, Wang B, Hyde KD, McKenzie EHC, Raja HA, Tanaka K, Abdel-Wahab MA, Abdel-Aziz FA, Doilom M, Phookamsak R, Hongsanan S, Wanasinghe DN, Yu X-D, Wang G-N, Yang H, Yang J, Thambugala KM, Tian Q, Luo Z-L, Yang J-B, Miller AN, Fournier J, Boonmee S, Hu D-M, Nalumpang S, Zhang H (2020) Freshwater Dothideomycetes. Fungal Divers 105:319–575

Jeewon R, Hyde KD (2016) Establishing species boundaries and new taxa among fungi: recommendations to resolve taxonomic ambiguities. Mycosphere 7:1669–1677

Lu YZ, Boonmee S, Liu JK, Hyde KD, Bhat DJ, Eungwanichayapant PD, Kang JC (2017) Novel Neoacanthostigma species from aquatic habitats. Cryptogam Mycol 38:169–191

 

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