Talaromyces aspriconidius 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

Talaromyces aspriconidius B.D. Sun, A.J. Chen, Houbraken & Samson sp. nov Fig. 7

Typus.

China, Yunnan, soil, 2008, isolated by L. Cai, Holotype CBS H-22833, culture ex-holotype CBS 141835 = DTO 340-F8.

ITS barcode.

MN864274. Alternative identification markers: BenA = MN863343, CaM = MN863320, RPB2 = MN863332.

Diagnosis.

Talaromyces aspriconidius produces strikingly roughened, globose conidia, grows moderately on CYA and CYA at 30 °C, reaches 22-23 mm and 25-26 mm after 7 d.

In.

Talaromyces section Talaromyces

Colony diam, 7 d (mm).

CYA 22-23; CYA 30 °C 25-26; CYA 37 °C 22-23; MEA 36-37; MEA 30 °C 44-45; OA 38-42; YES 28-29; CREA 7-8; CYAS No growth; DG18 10-11.

Colony characters.

CYA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white and peach (4); texture floccose; sporulation moderately dense; conidia en masse greyish yellow-green (68); soluble pigments absent; exudates absent; reverse buff (45). MEA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white; texture floccose; sporulation moderately dense; conidia en masse leek green (49) and greyish yellow-green (68); soluble pigments absent; exudates brown droplets; reverse saffron (10). YES 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white and peach (4); texture floccose; sporulation moderately dense; conidia en masse greyish yellow-green (68); soluble pigments absent; exudates absent; reverse saffron (10). DG18 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white and primrose (66); texture floccose; sporulation dense; conidia en masse honey (64); soluble pigments absent; exudates absent; reverse greyish yellow-green (68). OA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white and primrose (66); texture floccose; sporulation dense; conidia en masse yellow-green (71); soluble pigments absent; exudates clear droplets; reverse greyish yellow-green (68). CREA 25 °C, 7 d: Moderate growth, acid production absent.

Micromorphology.

Conidiophores biverticillate, stipes smooth, 150-250 × 3-4 μm, metulae 4-5, divergent, 10-12 × 3-3.5 μm; phialides 4-6, acerose to flask shaped, 8-10.5 × 3-3.5 μm; conidia strikingly roughened, globose, 3-4 μm. Ascomata not observed.

Notes.

Talaromyces aspriconidius is characterized by its strikingly roughened, globose conidia. Talaromyces aculeatus , T. apiculatus , T. diversus , T. solicola and T. verruculosus also produce this kind of conidia. However, T. aspriconidius grows slower than T. aculeatus , T. apiculatus and T. verruculosus , and faster than T. diversus and T. solicola on CYA and CYA at 30 °C ( Yilmaz et al. 2014).

Etymology.

Latin, aspriconidius , refers to its strikingly roughened conidia.

Figures

Figure 7. Talaromyces aspriconidius CBS 141835 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).