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. Setae173375 × 24 μm (= 252 × 3 μm, n = 20), hyaline, aseptate, cylindrical with conical apex. Conidiophores aggregated into sporodochia, with hyaline setae around the margin. Conidiogenous cells 1013 × 1.52.5 μm (= 11.5 × 2 μm, n = 20), monophialidic, hyaline, subulate. Conidia 57 × 12 μm (= 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, yellowwhite, 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).