Pleosporales » Dictyosporiaceae » Vikalpa

Vikalpa lignicola

Vikalpa lignicola D’souza, Bhat, H.Y. Su & K.D. Hyde

 

Index Fungorum number: IF551586, Facesoffungi number: FoF 01268

Etymology: ‘lignicola’ referring to the woody substrate.

Holotype: MFLU 15–1506

 

Saprobic on submerged decaying wood in a stream. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Conidiomata sporodochial, scattered, later coalescing, pale brown to dark brown, inconspicuous on substrate. Mycelium immersed in the substrate, composed of branched, septate, smooth, subhyaline to pale brown hyphae. Conidiophores micronematous, subhyaline, smooth-walled, aseptate, 4–5 μm wide. Conidiogenous cells holoblastic, terminal, determinate, doliiform, subhyaline to pale brown. Conidia 25–40.5 × 10–18 μm (x̄ = 32.5 × 13 μm, n = 50), acrogenous, holoblastic, solitary, pale brown, smooth-walled, non-complanate, distoseptate, with three rows in different planes, rows arising from a basal cell, each arm composed of 8–10 cells, cells guttulate when young, non-guttulate at maturity.

 

Material examined: CHINA, Yunnan, Dali, Cangshan Mountain, Xue Shan Stream, on decaying wood submerged in the stream, 11 August 2014, Zonglong Luo, XS-69-2 (MFLU 15–1506, holotype).

 

Notes: Vikalpa lignicola resembles V. australiensis, V. freycinetiae and V. micronesiaca in having 3 rows and non-complanate conidia (Matsushima 1981; Sutton 1985; McKenzie 2008). However, it differs from V. australiensis, which has mucilage covering the sporodochium (Sutton 1985). Vikalpa freycinatiae has an appendage on all 3 rows, while V. micronesiaca has euseptate conidia (Matsushima 1981). All species accepted in this genus have notable features, however, DNA sequence data is needed to establish their phylogenetic relationships.

 

References

Boonmee, S., D’souza, M.J., Luo, Z. et al. Dictyosporiaceae fam. nov. Fungal Diversity 80, 457–482 (2016). https://doi.org/10.1007/s13225-016-0363-z

Matsushima T (1981) Matsushima mycological Memoirs 2. Matsushima Mycol Mem 2:1–68

Sutton BC (1985) Notes on some deuteromycete genera with cheiroid or digitate brown conidia. Proc Indian Acad Sci Sect B 94:229–244

McKenzie EHC (2008) Two new dictyosporous hyphomycetes on Pandanaceae. Mycotaxon 104:23–28

 

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