Pleosporales » Dictyosporiaceae » Dictyocheirospora

Dictyocheirospora aquatica

Dictyocheirospora aquatica Z.L. Luo, D.J. Bhat & K.D. Hyde

 

Index Fungorum number: IF552683; Facesoffungi number: FoF 02733

Etymology: Referring to aquatic habitat of this fungus.

Holotype: HKAS 92714

 

Saprobic on decaying, submerged wood in freshwater. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on natural substrate superficial, scattered. Mycelium immersed, composed of pale brown, smooth, septate, branched hyphae. Conidiomata sporodochial, 150–250 μm wide, dark brown to black. Conidiophores micronematous, undifferentiated from vegetative hyphae, short. Conidiogenous cells holoblastic, integrated, terminal, pale brown, smooth-walled. Conidia 34–42 × 12.5–19.5 μm ( = 38 × 16 μm, n = 35), solitary, acrogenous, cheiroid, pale brown to brown, consisting of 5–6 rows of cells, with rows cylindrical, palmately divergent, inwardly curved at the tip, arising from a basal cell, without appendages, with each row composed of 8–10 cells, euseptate, slightly constricted at septa, smooth-walled. (Description from Wang et al. 2016)

 

Material examined: CHINA, Yunnan Province, Dulong River, on decaying submerged wood, 6 May 2015, Z.L. Luo, S-395 (HKAS 92714, holotype); ex-type living culture, KUMCC 15–0305.

 

Notes: Dictyocheirospora aquatica morphologically resembles D. subramanianii in having a similar conidial size and cylindrical, palmately divergent rows of cells, without appendages. However, D. aquatica differs from D. subramanianii in conidial shape with 5–6 separable rows, having 6–8 cells in each row, whereas the conidia in the latter has seven tightly appressed rows with each having 9–13 cells (Sutton 1985). Phylogenetic analysis also showed that D. aquatica is distinct from D. subramanianii (Wang et al. 2016).

 

References

Sutton BC (1985) Notes on some deuteromycete genera with cheiroid or digitate brown conidia. Proceedings of the National Academy of Sciences, India Section B 94, 229–244.

Wang RX, Luo ZL, Hyde KD, Bhat DJ, Su XJ, Su HY (2016) New species and records of Dictyocheirospora from submerged wood in north-western Yunnan, China. Mycosphere 7:1357–1367