Fungalpedia – Note 887, Distoseptispora
Distoseptispora. K.D. Hyde, McKenzie & Maharachch.
Citation when using this data: Dong W et al. 2021 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig 1
Classification: Distoseptisporales, Incertae sedis, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Distoseptispora was introduced to accommodate species segregated from Sporidesmium with relatively short conidiophores, and long cylindrical, darker conidia with slightly paler, rounded apices (Su et al. 2016). However, D. lignicola and D. obclavata have paler conidia (Luo et al. 2019). The sexual morph of Sporidesmium has been linked to two annulatascaceae-like taxa, S. lignicola and S. thailandense (Zhang et al. 2017, Luo et al. 2019), while no sexual morph are reported for Distoseptispora. Phylogenetic analyses place Distoseptispora and Sporidesmium in Distoseptisporaceae and Sporidesmiaceae, respectively (Hyde et al. 2020, this study). All Distoseptispora species have sequence data in GenBank and they clustered in a well-supported clade. However, the morphological characteristics are not much correlated with their phylogenetic relationships as discussed in Monkai et al. (2020). The euseptate species Distoseptispora rayongensis clusters with the distoseptate species D. obclavata with strong bootstrap support; the new species D. songkhlaensis having distoseptate conidia clusters with an euseptate species D. guttulata in a well-supported clade; the euseptate species D. suoluoensis clusters with the distoseptate species D. bambusae in a distinct subclade within Distoseptispora. Above examples reveal that the conidial septa in Distoseptispora species are not informative for generic delineation, but are highly informative at the species level. The asexual morphs of Distoseptispora are morphologically quite similar, thus their sexual morphs would be useful to better understand the taxonomy of Distoseptispora species. Distoseptispora species were commonly found from freshwater in China and Thailand (Su et al. 2016, Luo et al. 2018, 2019, Yang et al. 2018, Hyde et al. 2019, 2020). We introduce three new asexual species collected from submerged wood in Thailand.
Type species: Distoseptispora fluminicola McKenzie.
Other accepted species: Species Fungorum – search Distoseptispora.
Figure 1 – Distoseptispora fasciculata (MFLU 18-1714, holotype). a, b Colonies on submerged wood. c Fasciculate conidiophores with conidia. d–h Conidia. i, j Colony on PDA (up-front, down-reverse). Scale bars: c, e–h = 30 μm, d = 20 μm.
References
Entry by
Wei Dong, Faculty of Agriculture and Food, Kunming University of Science & Technology, Kunming 650500, China, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Center of Excellence for Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China
Published online 15 February 2021