Pleosporales » Didymosphaeriaceae » Torula

Torula breviconidiophora

Torula breviconidiophora C.G. Lin & K.D. Hyde, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [69] (2019)

Index Fungorum number: IF555428         Facesoffungi number: FoF05069



Sexual morph: Undetermined. Asexual morph: Colonies effuse on the natural substrate, scattered, hairy, dark brown. Mycelium immersed to superficial, composed of pale brown, septate, branched hyphae. Conidiophores macronematous, mononematous, subcylindrical, erect, septate, smooth, straight or flexuous, subhyaline to dark brown, with ampulliform cells, 3.5–28 μm long, 3–8 μm wide at the widest part. Conidiogenous cells mono- to polyblastic, integrated, terminal, on conidiophores, terminal or intercalary in conidial chains, doliiform to ellipsoid, pale brown, collapsing in above half when old, 4–7 μm long, 3–7 μm wide. Conidia phragmosporous, in branched chains, acrogenous, dry, cylindrical, medium to dark brown, with apical cell subhyaline or pale brown, 1–4-septate, deeply constricted at septa, verrucose, rounded at both ends, easily separating, 8–21 μm long (x̄ = 15.2 μm, n = 60), 3.5–7 μm wide (x̄ = 5.2 μm, n = 60).


Culture characteristics: Conidia germinating on PDA within 12 h. Colonies on PDA effuse, greyish brown to dark brown, reaching a diam. of 4-6 cm in 10 days at 25 °C.


Material examined: Thailand, Chang Rai Province, Muang District, Mae Fah Luang University, near S7 building, on decaying wood, 20 July 2016, Chuangen Lin, ML 1–4 (MFLU 18–1693, holotype; HKAS 102196, isotype), ex-type living culture (KUMCC 18–0130).


GenBank Accession No: ITS: MK071670, LSU: MK071672, SSU: MK071697, TEF1: MK077673.


Notes: This species is most similar to T. mackenziei which is characterized by greyish brown conidia composed of moniliform cells and 2–3 septa (Li et al. 2017). However, the conidia of T. breviconidiophora are medium to dark brown, with 1–4-septate, subhyaline or pale brown apical cells. From the phylogenetic trees of Bayesian inference, maximum parsimony and maximum likelihood analyses based on combined ITS, LSU, SSU and TEF1, this species is closest to T. chromolaenae and T. mackenziei. Torula chromolaenae is distinct from other Torula species in having smaller and doliiform conidiogenous cells and 2–3-septate conidia (Li et al. 2017). Torula breviconidiophora differs from T. chromolaenae by its longer conidiophores (3.5–28 μm vs 5–6.3 μm).


Figure X. Torula breviconidiophora (MFLU 18–1693, holotype). a, b Host material. b Conidiophores on leaf surface. c, d Conidiophores, conidiogenous cells and conidia. e–g Conidia. Scale bars: c–g = 10 μm.


Reference: Hyde KD, Tennakoon DS, Jeewon R, Bhat DJ, et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 96(1): 1242.




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