Pleosporales » Dictyosporiaceae » Dictyocheirospora

Dictyocheirospora garethjonesii

Dictyocheirospora garethjonesii Z.L. Luo, H.Y. Su & K.D. Hyde

 

Index Fungorum number: IF 552684; Facesoffungi number: FoF 02734

Etymology: In honour of Professor E.B.G. Jones for his major contributions to mycology.

Holotype: HKAS 92836

 

Saprobic on decaying, submerged wood in freshwater. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on natural substrate superficial, scattered. Mycelium immersed, composed of brown, smooth, septate hyphae. Conidiomata sporodochial, dark brown, 200–300 μm wide. Conidiophores micronematous, undifferentiated from vegetative hyphae, short. Conidiogenous cells holoblastic, integrated, terminal, pale brown, cylindrical, smooth-walled. Conidia 45.5–54.5 × 15.5–24.5 μm (x̄ = 50 × 20 μm, n = 25), solitary, acrogenous, cheiroid, brown, consisting of 6–7 rows of cells, with rows digitate, cylindrical, inwardly curved at apex, arising from a basal cell, without appendages, with each row composed of 7–10 cells, euseptate, slightly constricted at septa. (Description from Wang et al. 2016)

 

Material examined: CHINA, Yunnan Province, Lancang River, on submerged wood, 25 April 2015, Z.L. Luo, S-310 (HKAS 92836, holotype), ex-type living culture MFLUCC 16–0909; ibid. Jinsha River, on submerged wood, 18 April 2015, S.M. Tang, S-422 (DLU 0422); living culture, KUMCC 15–0396.

 

Notes: Dictyocheirospora garethjonesii is morphologically similar to D. rotunda and D. aquatica. However, D. garethjonesii differs from D. rotunda in having conidia with 6–7 rows with each row composed of 7–10 cells, whereas the conidia of D. rotunda have 5–7 rows with each row composed of 8–12 cells (Boonmee et al. 2016). Dictyocheirospora garethjonesii differs from D. aquatica in having larger conidia (45.5–54.5 × 15.5–24.5 µm vs 34–42 × 12.5–19.5 µm) and conidia with 6–7 rows and each row composed of 7–10 cells, whereas the conidia of D. aquatica have 5–6 rows and each row composed of 6–8 cells. Phylogenetic analysis also showed that D. garethjonesii is distinct from D. subramanianii (Wang et al. 2016).

 

References

Boonmee S, D'souza MJ, Luo ZL, Pinruan U et al. (2016) Dictyosporiaceae fam. nov. Fungal Diversity 80, 457–482.

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

 

Fig. 1. Dictyocheirospora garethjonesii (HKAS 92836, holotype) a–b. Colonies on the substrate, c. Squash mount of conidia, d–f. Conidia, g–h. Crushed conidia, i. Germinating conidium. Scale bars: b = 250 μm, c = 150 μm, d–i = 20 μm.

 

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