Pleosporales » Corynesporascaceae » Corynespora

Corynespora doipuiensis

Corynespora doipuiensis J.F. Li & Phookamsak, , in Hyde et al., Asian Journal of Mycology 3(1): 62 (2020)

Index Fungorum number: IF557020       Facesoffungi number: FoF 07056

 

Sexual morph: Undetermined. Asexual morph: Hyphomycetous, colony on natural substrate effuse, dark brown or black. Colonies effuse, thin, cottony, pale to dark grey. Mycelium partly superficial, consisting of branched, septate, smooth, thin-walled, pale hyphae. Conidiophores 212–426 × 10–15 µm ( = 313.45 × 13.89 µm, n = 40), macronematous, setiferous, erect, straight or flexuous, often arising in groups, septate, unbranched, thick-walled, dark brown, sometimes light brown at the tip, percurrently proliferating from cut ends. Conidiogenous cells 27–5 × 10–16 µm ( = 33.71 × 13.34 µm, n = 100) monotretic, integrated, terminal, light to moderately dark brown, often percurrently proliferating. Conidia 136–165 × 5–25.5 µm ( = 143.7 × 21.31 µm, n = 100), solitary, simple, obconical, curved, subhyaline to moderately brown, acrogenous, pseudoseptate, guttulate, thick- walled, smooth, with a dark basal scar, wide at lower part, narrow and elongate at the upper part.

 

Culture characteristics: Conidia germinating on PDA within 12 hours and germ tubes produced from both ends. Colonies growing on PDA, cottony, white to pale grey, reaching 5 mm in 7 days at 30 ºC, mycelium partly superficial, partly immersed, slightly effuse, radially striate, with irregular edge, white; Asexual and sexual spores are not formed within 60 days.

 

Habitat: on dead herbaceous branch (Hyde et al. 2020).

 

Known distribution: Thailand, Chiang Rai Province (Hyde et al. 2020).

 

Material examined: Thailand, Chiang Rai Province, Doi Pui, on dead herbaceous branch, 9 January 2014, J.F Li, H-15 (MFLU 14–0388, holotype), ex-type living culture at MFLUCC 14– 0022.

 

GenBank Accession No: TS: MN648322, LSU: MN648326, SSU: MN648318.

 

Notes: Strain (MFLUCC 14–0022) shares a size range of the conidial characters with the type and other representative specimens (Voglmayr & Jaklitsch 2017). However, Corynespora doipuiensis is unique in having lanky, curved, hyaline to light brown conidia with long and brown conidiophores. Furthermore, phylogenetic analysis shows that our strain (MFLUCC 14–0022) forms a well-supported subclade (0.99 BYPP) (Hyde et al. 2020) with Corynespora submersa (MFLUCC 16–1101) with support. Our specimen is identified as a novel species Corynespora doipuiensis collected from herbaceous aerial dead branches from Chiang Rai, Thailand.