Hypocreales » Stachybotryaceae » Stachybotrys

Stachybotrys subcylindrospora

Stachybotrys subcylindrospora C.Y. Jie, Y.L. Jiang, D.W. Li, E.H.C. McKenzie & Yong Wang bis, Mycological Progress 12 (4): 695 (2012)  Fig. X

 

Index Fungorum Number: IF821464; Facesoffungi number: FoF08728

Colonies on PDA, initially with abundant white to brownish aerial mycelium, mostly superficial, immersed at margins, forming lobate shaped edge reaching a diam. of 2–3 cm in 7 days at 25^oC; becoming amber to brownish with wrinkled granulated surface. After 3 weeks, conidiophores forming on the aerial mycelium becoming slimy with grey to black conidial masses; reverse brownish center and amber at periphery. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Conidiophores macronematous, mononematous, single or in groups, determinate, thin-walled, simple to irregularly branched, erect to slightly curved, hyaline to sub-hyaline, uniseptate, smooth, 22–70 µm long, 2–6 µm wide (x̅ = 50 × 4 μm, n = 30) with curved base, terminating in phialidic conidiogenous cells. Phialides in groups of 3–6 on the apices of conidiophores, discrete, clavate to subclavate, hyaline, smooth, 6–11 µm long and 2–6 µm wide (x̅ = 9 × 5 μm, n = 30), with conspicuous collarettes. Conidia acrogenous, aggregated in slimy masses, aseptate, cylindrical or subcylindrical, thick-walled, truncated at base, rounded at the apex, hyaline when young, becoming subhyaline to brown at maturity, verruculose, 6–11 µm long, 4–6 µm wide (x̅ = 10 × 4.5 μm, n = 30); young conidia bear delicate irregular to circular striations and become 1–3 guttulate when mature.

Distribution – Hainan Province in China (Jie et al. 2013)

Known hosts – Tropical primeval rain forest soil (Jie et al. 2013)

Material examined – Thailand, Chiang Mai Province, Mae Tang district, Ban Pa Deng, Mushroom Research Center, N 19^O 07’ 13.7”, E 98^O 43’ 52,9”, 905 m, in forest soil (dominated by Dipterocarpaceae), 20^th March 2019, Erandi Yasanthika, Er202 (MFLU 20-0505); living culture MFLUCC 20-0120

 

 

 

 

 

Figure X – Stachybotrys subcylindrospora (MFLUCC 20-0120) a Mature colony on PDA after 3 weeks with the sporulation. b Reverse of the colonies on PDA after 3 weeks. c, d Sporulation of the colony appear grey to black with conidial attachments on the mycelium. e Mycelium with aseptate hyphae. f–k Conidiogenesis cells and conidia attached on the conidiophore. l–p Conidia. Scale bars: e– k = 20 μm, l = 10 μm, m–p = 5μm

 

 

Reference

Jie CY, Geng K, Jiang Y–L, Xu JJ 2013 – Stachybotrys from soil in China, identified by morphology and molecular phylogeny. Mycological Progress 12, 693–698.

 

 

Source:

Data and figures were reprinted with permission from:

Yasanthika WAE, Wanasinghe DN, Karunarathna SC, Bhat DJ, Samarakoon SMBC, Ren GC, Monkai J, Mortimer PE, Hyde KD 2020 – Two new Sordariomycetes records from forest soils in Thailand. Asian Journal of Mycology 3(1), 456–472, Doi 10.5943/ajom/3/1/16-in AJOM

 

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