Hypocreales » Stachybotryaceae » Hyalinostachys

Hyalinostachys cylindrospora

Hyalinostachys cylindrospora C.G. Lin & K.D. Hyde, in Hyde et al., Mycosphere 11(1): 878 (2020)

Index Fungorum number: IF 555605

Holotype – MFLU 17-2650


Saprobic on plant host. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies effuse, hairy, pale to pale brown. Mycelium partly superficial and partly immersed. Conidiophores macronematous, mononematous, single or in small groups, simple or sometimes branched, erect, straight, septate, thick-walled, smooth, hyaline, up to 310 μm, 4–12 μm, narrower at the apex, bearing a whorl of 4–5 conidiogenous cells. Conidiogenous cells monophialidic, discrete, determinate, terminal, elongate ampulliform, clavate or subcylindrical, the outer ones somewhat curved and ventricose, hyaline, smooth, 13–19 × 3.5–6 μm; conidial mass slimy, pale orange. Conidia acrogenous, aseptate, smooth, hyaline, cylindrical or ellipsoidal, 14–16.5 × 5.5–7 μm (Hyde et al. 2020).

Culture characteristics: Conidia germinating on PDA in 12 h. Colonies on PDA, reaching 3 mm in 2 weeks at 25°C, flat, dark from above and the reverse. Mycelium immersed in media, composed of branched, septate, smooth, hyaline hyphae.

Genbank numbers: ITS: MG717501, LSU: MG717503, rpb2: MK133023.


Notes: This species belongs to family Stachybotryaceae, and its placement is supported by morphology and phylogenetic analysis (Hyde et al. 2020). Hyalinostachys cylindrosporacan be distinguished from other stachybotrys-like species by its hyaline conidiophores and hyaline, cylindrical or ellipsoidal conidia (Hyde et al. 2020).