Bahusutrabeeja

Fungalpedia – Note 2418, Bahusutrabeeja

Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1

Classification: Incertae sedis, Incertae sedis, Incertae sedis, Incertae sedis, Pezizomycotina, Ascomycota, Fungi

Saprobic on submerged wood in freshwater or rotten leaf, wood in terrestrial habitats. Sexual morph: Undetermined. Asexual morph: Colonies hairy on wood. Mycelium mostly immersed, composed of septate, brown hyphae. Conidiophores macronematous, erect, straight, cylindrical, smooth, brown, paler towards the apex, lacking hyphopodia at the base, septate, simple or branched, thick-walled, often proliferating percurrently through the collarette. Conidiogenous cells monophialidic, with a distinct collarette, terminal, integrated. Phialides producing many conidia singly and successively from the tip. Phialoconidia acrogenous, initial conidium pear-shaped, others globose to subglobose, hyaline with granular cytoplasm, aggregated in slimy mass at the tip of the phialide, aseptate, with some slender appendages, with or without a large, lipid globule (Subramanian and Bhat 1977; Tsui et al. 2001a).

Notes: Bahusutrabeeja was established to accommodate a taxon producing pear-shaped to subglobose, unicellular, hyaline phialoconidia with some slender surface appendages (Subramanian and Bhat 1977). The type species B. dwaya was initially isolated from dead twigs of Coffea arabica in India (Subramanian and Bhat 1977), subsequently collected from freshwater habitats in Hong Kong, China (Tsui et al. 2000, 2001a, c) and Malaysia (Kuthubutheen et al. 1992). The collection from Malaysia (IMI 344362) has longer appendages than the holotype (MUBL 2351) (up to 12 μm vs. 4.5–5.5 μm). The collection of Tsui et al. (2001a) has a large lipid globule, which was not found in other collections.

Bahusutrabeeja dwaya clustered with Neodeightonia subglobosa C. Booth with strong bootstrap support and Bahusutrabeeja was placed in Botryosphaeriaceae (Shenoy et al. 2010). Wijayawardene et al. (2017) listed Bahusutrabeeja in Botryosphaeriales genera incertae sedis.
A strain GUFCC 4904 of B. dwaya collected from India (Shenoy et al. 2010), is included in our phylogenetic tree. The result shows that B. dwaya nests between Botryosphaeriaceae and Phyllostictaceae in Botryosphaeriales with strong bootstrap support. However, Pem et al. (2019b) thought that GUFCC 4904 is a wrong isolation and transferred Bahusutrabeeja to Chaetosphaeriales in Sordariomycetes based on a ITS sequence of CBS 261.77 derived from the ex-type culture of B. dwaya. The hyphomycetous species B. dwaya also can not be placed in Botryosphaeriales based on morphology (Hyde et al. 2013; Crous et al. 2015b; Linaldeddu et al. 2016; Tao et al. 2016). Only ITS sequence of B. dwaya (CBS 261.77) is deposited in GenBank. Additional sequences are expected, so the placement of B. dwaya would be clear with phylogenetic analyses. We follow Pem et al. (2019b) and Wijayawardene et al. (2020) and place Bahusutrabeeja in Chaetosphaeriales (Sordariomycetes).

Type species: Bahusutrabeeja dwaya Subram. & Bhat

Other accepted species: Species Fungorum – search Codinaea.

Figure 1 – a–g Bahusutrabeeja dwaya (redrawn from Subramanian and Bhat (1977), MUBL 2351, holotype). a, c, d Conidiophores bearing conidia. b Conidiophore. e, f Conidia. Scale bars: a = 50 μm, b = 30 μm, c, e, f = 10 μm, d = 15 μm.

References

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Entry by

Wei Dong, Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China

Published online 21 May 2026

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