Pleosporales » Dictyosporiaceae » Dictyocheirospora

Dictyocheirospora rotunda

Dictyocheirospora rotunda M.J. D’souza, Bhat & K.D. Hyde


Index Fungorum number: 551581


Saprobic on submerged wood. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Conidiomata sporodochial, punctiform, velvety, black. Mycelium mostly immersed. Conidiophores micronematous, reduced. Conidiogenous cells holoblastic, monoblastic, integrated, terminal, determinate, pale brown, smooth-walled. Conidia 50–62 × 19–25 µm ( = 56 × 22 µm, n = 15), solitary, acrogenous, cheiroid, pale brown to dark brown, consisting of 4–6 rows of cells, rows digitate, cylindrical to narrowly clavate, inwardly curved at the apex, with a subglobose, cuneiform basal cell, each arm composed of 10–12 cells, septate, constricted at septa. (Description from Dong et al. 2020)


Culture characteristics: On PDA, colony circular, reaching 50 mm in 25 days at 25 °C, grey to brown from above, black from below, surface rough, with dense mycelium, produced conidia in culture after 10 days, dry, raised, edge entire.


Material examined: CHINA, Yunnan Province, Kunming University of Science & Technology, on submerged wood in a stream, 10 May 2017, C.X. Liu, L13 (HKAS 102143), living culture KUMCC 19-0103; ibid., Qujing, on submerged wood in a stream, 10 May 2017, W. Dong, L40 (HKAS 102146), living culture KUMCC 19-0105.


Notes: Our two new collections KUMCC 19-0103 and KUMCC 19-0105 have slightly thinner conidia (50–62 × 19–25 µm vs. 42–58 × 19–38 μm) than the holotype in Thailand (Boonmee et al. 2016). Two collections cluster with D. rotunda with high bootstrap support (Dong et al. 2020).


Freshwater distribution: China (Wang et al. 2016; Dong et al. 2020), Thailand (Boonmee et al. 2016)



Boonmee, S., D’souza, M.J., Luo, Z. et al. Dictyosporiaceae fam. nov. Fungal Diversity 80, 457–482 (2016).

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

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