Pleosporales » Didymosphaeriaceae » Torula

Torula polyseptata

Torula polyseptata C.G. Lin & K.D. Hyde, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [71] (2019)

Index Fungorum number: IF555429         Facesoffungi number: FoF05070



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 slightly flexuous, dark brown to black, 10–40 μm long, 3.5–8 μm wide at the widest part. Conidiogenous cells holoblastic, mono- to polyblastic, integrated, terminal or intercalary in conidial chains, doliiform, pale brown, collapsing in above half when old, 4.5–8.5 μm long, 4.5–8 μm wide. Conidia phragmosporous, in branched chains, acrogenous, dry, cylindrical, medium to dark brown, 2–8-septate, deeply constricted at septa, verrucose, rounded at both ends, easily separating, 10–40 μm long (x̄ = 19.3 μm, n = 35), 3.5–7.5 μm wide (x̄ = 5.5 μm, n = 35).


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, on decaying wood, 20 July 2016, Chuangen Lin, ML 21-2 (MFLU 18-1694, holotype; HKAS 102197, isotype), ex-type living culture (KUMCC 18-0131).


GenBank Accession No: ITS: MK071671, LSU: MK071673, SSU: MK071698, TEF1: MK077674.


Notes: This species is most similar to Torula pluriseptata in their conidial morphology, however, the conidiophores of T. polyseptata are longer than T. pluriseptata (10–40 μm vs 2.8–4.3 μm). Torula polyseptata forms a clade together with strains of T. chiangmaiensis with 98% MP bootstrap support, 97% ML bootstrap support and 0.97% Bayesian posterior probabilities within the genus Torula. Torula polyseptata is distinct from T. chiangmaiensis by the size and number of septa in the conidia. The ex-type strains are in bold and black. The newly generated sequences are indicated in bold and blue. The tree is rooted with Dendryphion nanum (HKAS 84010).


Figure X. Torula polyseptata (MFLU 18-1694, holotype). a, b Host material. b Conidiophores on leaf surface. c–e Conidiophores, conidiogenous cells and conidia. f–j Conidia. Scale bars: c = 20 μm, d–j = 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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