Chaetothyriales » Chaetothyriales, family incertae sedis » Bahusutrabeeja

Bahusutrabeeja dwaya

Bahusutrabeeja dwaya Subram. & Bhat, Can. J. Bot. 55(16): 2204 (1977)                                                                     Fig. 1

 

Index Fungorum number: IF 309440; Facesoffungi number: FoF 06218

 

Saprobic on dead twigs of Coffea arabica L. Sexual morph: undetermined. Asexual morph: Hyphomycetous. Mycelium hairy, medium dense, partly immersed, partly superficial, composed of thin, branched, septate, smooth-walled, light brown 2–3 µm wide hyphae. Setae and hyphopodia absent. Conidiophores 41–90 µm × 3–6 µm (x̅ = 57.3 × 4.2 µm, n = 20), distinct, single, macronematous, mononematous, solitary, erect, straight or slightly flexuous, septate, unbranched, rarely branched, cylindrical, smooth, thick-walled, dark reddish brown near the base, light brown in the apical part. Conidiogenous cells monophialidic, terminal, integrated, light brown, smooth, with a conspicuous colarrette, 2 µm long, 4 µm wide at the tip. Conidia 9–15 µm × 10–15 µm (x̅ = 12.6 × 11.4 µm, n = 10), solitary, simple, slimy, endogenous, hyaline, aseptate, smooth, thick-walled, rounded-cubical to polygonal, spherical to obovoid, hyaline to sub-hyaline, with 8–12 µm flexuous, thin, 7–11 µm long, hyaline appendages distributed all over the surface.

 

Material examined – INDIA, Tamil Nadu. On dead twigs of Coffea arabica, (Rubiaceae), 25 May 1977, C.V. Subramanian (K (M) 213921).

 

Economic significance – The genus Bahusutrabeeja has been reported on leaf litter of various hosts (Paulus 2004). Bahusutrabeeja dwaya is also pathogenic causing amphigenous brown spots on living leaves of Mallotus philippinensis Muell. (Euphorbiaceae) (Wu et al. 2003).

 

 

Figure 1 – Bahusutrabeeja dwaya (K (M) 213921). a, b Details of herbarium material. c mycelium on dry culture. d–g. Conidiophores. h–k Conidia. Scale bars: c = 1 mm, d–g = 20 µm, h–k = 10 µm.

 

References

Wu WP, Mckenzie E. 2003 – Obeliospora minima sp. nov. and four other hyphomycetes with conidia bearing appendages. Fungal Diversity 12, 223–234

 

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