Talaromyces tenuis B.D. Sun, A.J. Chen, Houbraken & Samson, 2020

Sun, Bing-Da, Chen, Amanda J., Houbraken, Jos, Frisvad, Jens C., Wu, Wen-Ping, Wei, Hai-Lei, Zhou, Yu-Guang, Jiang, Xian-Zhi & Samson, Robert A., 2020, New section and species in Talaromyces, MycoKeys 68, pp. 75-113 : 75

publication ID	https://dx.doi.org/10.3897/mycokeys.68.52092
persistent identifier	https://treatment.plazi.org/id/84420C8A-B025-53A1-808E-5777DBFB18A0
treatment provided by	MycoKeys by Pensoft (2020-07-08 09:06:52, last updated 2022-11-11 03:14:43)
scientific name	Talaromyces tenuis B.D. Sun, A.J. Chen, Houbraken & Samson
status	sp. nov.

Treatment

Talaromyces tenuis B.D. Sun, A.J. Chen, Houbraken & Samson sp. nov. Fig. 5 View Figure 5

Typus.

China, Guizhou, soil, 2014, isolated by X.Z. Jiang, Holotype CBS H-22838, culture ex-holotype CBS 141840 = DTO 340-G9.

ITS barcode.

MN864275. Alternative identification markers: BenA = MN863344, CaM = MN863321, RPB2 = MN863333.

Diagnosis.

Talaromyces tenuis produces hyaline, thin conidiophores, yellow mycelium on MEA and OA, and grows very restrictedly on CYA, YES and DG18.

In.

Talaromyces section Tenues

Colony diam, 7 d (mm).

CYA 7-8; CYA 30 °C 5-8; CYA 37 °C No growth; MEA 18-20; MEA 30 °C 10-11; OA 12-14; YES 9-10; CREA No growth; CYAS No growth; DG18 2-3.

Colony characters.

CYA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white; texture floccose; sporulation absent; soluble pigments absent; exudates absent; reverse white. MEA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium sulphur yellow (15) or ochreous (44); texture floccose; sporulation sparse; conidia en masse white or greyish yellow-green (68); soluble pigments absent; exudates absent; reverse ochreous (44) to umber (9). YES 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white; texture floccose; sporulation absent; soluble pigments absent; exudates absent; reverse buff (45). DG18 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white; texture floccose; sporulation absent; soluble pigments absent; exudates absent; reverse white. OA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium pale luteous (11); texture floccose; sporulation absent; soluble pigments absent; exudates absent; reverse buff (45).

Micromorphology.

Conidiophores monoverticillate or biverticillate, stipes smooth, 80-150 × 2-3 μm; metulae 2-3, divergent, 8-9 × 2-2.5 μm; phialides 2-3, acerose, 8-9.5 × 2-2.5 μm; conidia smooth, globose to subglobose, 2-3 × 2-2.5 μm. Ascomata not observed.

Note.

Talaromyces tenuis is phylogenetically distinct and is basal to species belonging to sections Talaromyces and Helici (Fig. 1 View Figure 1 ). In a nine-gene phylogeny, it is sister to sections Purpurei and Trachyspermi ( Houbraken et al. 2020). This species is characterized by hyaline, thin conidiophores, and grows very restrictedly on CYA, YES and DG18; colonies on MEA and OA have prominent yellow mycelia.

Etymology.

Latin, tenuis , refers to its thin conidiophores.

References

Houbraken, J, Kocsube, S, Visagie, CM, Yilmaz, N, Wang, XC, Meijer, M, Kraak, B, Hubka, V, Samson, RA, Frisvad, JC, 2020. Classification of Aspergillus, Penicillium, Talaromyces and related genera (Eurotiales): an overview of families, genera, subgenera, sections, series and species. Studies in Mycology (accepted).

Figures

Figure 1. Concatenated phylogeny of the ITS, BenA, CaM and RPB 2 gene regions of species from Talaromyces. Branches with values more than 1 pp and 95 % bs are thickened, supports lower than those values are indicated with a dash (-). Trichocoma paradoxa (CBS 788.83 T) was chosen as outgroup. T: ex-type.

Figure 5. Talaromyces tenuis CBS 141840 T a colonies from left to right (top row) CYA, MEA, YES and OA; (bottom row) CYA reverse, MEA reverse, DG 18 and CREA b-g conidiophores and conidia. Scale bars: 10 μm (b-g).