Hypocreales » Bionectriaceae » Clonostachys

Clonostachys krabiensis

Clonostachys krabiensis Tibpromma & K.D. Hyde, in Tibpromma et al., Fungal Diversity: 10.1007/s13225-018-0408-6, [93] (2018)

Index Fungorum number: IF554527         Facesoffungi number: FoF04539

 

Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Setae173–375 × 2–4 μm (x̄ = 252 × 3 μm, n = 20), hyaline, aseptate, cylindrical with conical apex. Conidiophores aggregated into sporodochia, with hyaline setae around the margin. Conidiogenous cells 10–13 × 1.5–2.5 μm (x̄ = 11.5 × 2 μm, n = 20), monophialidic, hyaline, subulate. Conidia 5–7 × 1–2 μm (x̄ = 6 × 1.6 μm, n = 40), slimy, solitary, aseptate, hyaline, cylindrical to oblong, smooth-walled.

Culture characteristics: Conidia germinating on MEA within 12 h. Colonies on MEA, irregular, undulate edge with whorls, yellow–white, flat on media surface.

Habitat: Known to inhabit on Pandanus sp.

 

Known distribution: Thailand.

 

Material examined: Thailand, Krabi Province, Mueang Krabi District, on Pandanus sp., 14 December 2015, S. Tibpromma KB029 (MFLU 16-1907, holotype; HKAS 96256, isotype); ex-type living culture, MFLUCC 16-0254.

GenBank numbers: LSU: MH376707; ITS: MH388335; SSU: MH388304.

Notes: Based on phylogeny Clonostachys kraviensis clusters with C. byssicola Schroers (95% in ML). However, C. byssicola has shorter conidia (frequently less than 5 µm long) with slightly curved, and a laterally displaced hilum (Schroers 2001). We also compared our fungus with Clonostachys compactiuscula but it has conidia produced in long chains up to 150 lm long (Hawksworth and Punithalingam 1975). In a BLASTn search on NCBI GenBank, the closest matches of ITS sequence of MFLUCC 16-0254 is C. rosea with 99% identity to the strain FIS26 (KY378958), while the closest matches with the SSU sequence were with 99% identical C. rosea strain WY-1 (MH031706).

Figure X. Clonostachys krabiensis (MFLU 16-1907, holotype). a–c Sporodochial conidiomata on dead leaves of Pandanus sp. d Conidiophores, conidiogenous cells and conidia. e, f Conidia. g Germinating conidium. h, i Colonies on MEA from above and below. Scale bars: a–c = 100 μm, d, g = 5 μm, e, f = 2 μm.

Reference: Tibpromma S, Hyde KD, McKenzie EHC, Bhat DJ, Phillips AJL, Wanasinghe DN, Samarakoon MC, Jayawardena RS, Dissanayake AJ, Tennakoon DS, Doilom M, Phookamsak R, Tang AMC, Xu JC, Mortimer PE, Promputtha I, Maharachchikumbura SSN, Khan S, Karunarathna SC (2018) Fungal diversity notes 840–928: micro-fungi associated with Pandanaceae. Fungal Diversity. 93:1-160.

 

 

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