Distoseptispora guizhouensis X. Tang& Jayaward, sp. nov.2021
MycoBank Index Fungorum number: IF558532; Facesoffungi number: FoF 09942
Holotype: GZAAS21-0381.
Morphological description
Sexual morph：
Asexual morphs: Hyphomycetous. Colonies superficial, effuse, hairy, gregarious, brown to dark brown. Mycelium mostly immersed on host substrate, septate, branched, pale brown to dark brown. Conidiophores 21–50 × 4–9 μm (x̅= 32 × 7 μm, n = 30), macronematous, mononematous, erect, cylindrical, Singly or in groups, straight or slightly flexuous, septate, slightly constricted at septa, wide at the base, unbranched, brown to dark brown, thin-walled, smooth. Conidiogenous cells holoblastic, monoblastic, integrated, determinate, terminal, subcylindrical, brown, smooth. Conidia 90–273 × 15–21 μm (x̅= 178 × 18μm, n = 30), acrogenous, solitary, thin-walled, smooth, obclavate, slightly curved to curved, rarely slightly constricted at septa, 10–38- distoseptate, brown to dark brown, usually paler towards apex, rounded at apex, with a truncate base and faintly to heavily pigmented scar.
Cultures: Colony on PDA, circular, fluffy, white, dense, light yellow mycelium in the center, but becoming sparse and paler at the entire margin, pigment. In reverse, olivaceous, brown at the center, lightly brown at the entire margin. In reverse dark gray.
Habitat: on decaying wood in terricolous habitat.
Distribution: China, Guizhou Province, Guiyang City, Xiaochehe Park.
GenBank Accession: (ITS) MZ474868, (LSU) MZ474869, (SSU) MZ474870, (rpb2) MZ501611 and (tef-1) MZ501610.
Notes: Distoseptispora guizhouensis forms a sister taxon of an uncultured fungus clone (C1_AF3) with 92% ML, 89% MP and 1 PP support (Fig. 17). However, C1_AF3 cannot provide any morphological features, but phylogenetic analysis has shown C1_AF3 belongs to the genus Distoseptispora. Thus, we consider D. guizhouensis as a novel species according to the guidelines of Jeewon & Hyde (2016).
Reference: Hyde KD, Suwannarach N, Jayawardena RS, Manawasinghe IS, Liao CF, Doilom M, Cai L, Zhao P, Buyck B, Phukhamsakda C, Su WX, Fu YP, Li Y, Zhao RL, He MQ, Li JX, Tibpromma S, Lu L, Tang X, Kang JC, Ren GC, Gui H, Hofstetter V, Ryoo R, Antonín V, Hurdeal VG, Gentikaki E, Zhang JY, Lu YZ, Senanayake IC, Yu FM, Zhao Q, Bao DF 2021 – Mycosphere notes 325-344 – Novel species and records of fungal taxa from around the world. Mycosphere 12(1), 1101–1156, Doi 10.5943/mycosphere/12/1/14
Distoseptispora guizhouensis (Holotype: GZAAS21-0381). a, b Colonies on dead wood. c–e Conidiophores, conidiogenous cell with conidia. f, g Conidiogenous cell bearing conidia.h–k Conidia. l Germinated conidia. m, n Colony on PDA (up-front, down-reverse). Scale bars: c–g, k, l = 50 μm, h–j = 20 μm.
