Talaromyces brevis 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 brevis B.D. Sun, A.J. Chen, Houbraken & Samson sp. nov. Fig. 8

Typus.

China, Beijing, soil, 2010, isolated by B.D. Sun, Holotype CBS H-22831, culture ex-holotype CBS 141833= DTO 349-E7.

Additional material examined.

Turkey, Zonguldak, soil, 2014, isolated by Rasime Demirel, culture DTO 307-C1. Maroc, soil, 2005, isolated by J. Dijksterhuis, culture CBS 118436 = DTO 004-D8.

ITS barcode.

MN864269. Alternative identification markers: BenA = MN863338, CaM = MN863315, RPB2 = MN863328.

Diagnosis.

Talaromyces brevis produces short conidiophores measuring 15-50 × 3-4 μm, yellow to orange ascomata on OA and spiny ascospores measuring 3.5-4.5 × 3-4 μm.

In.

Talaromyces section Talaromyces

Colony diam, 7 d (mm).

CYA 30-31; CYA 30 °C 28-30; CYA 37 °C 25-26; MEA 50-51; MEA 30 °C 57-60; OA 39-43; YES 42-43; CREA 13-14; CYAS No growth; DG18 13-15.

Colony characters.

CYA 25 °C, 7 d: Colonies moderately deep, sulcate; margins entire; mycelium white and flesh (37); texture floccose; sporulation sparse; conidia en masse white; soluble pigments absent; exudates absent; reverse ochreous (44). MEA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white and primrose (66); texture floccose; sporulation sparse; conidia en masse white to greyish yellow-green (68); soluble pigments absent; exudates absent; reverse ochreous (44). YES 25 °C, 7 d: Colonies moderately deep, sulcate; margins entire; mycelium white; texture floccose; sporulation absent; soluble pigments absent; exudates absent; reverse ochreous (44). DG18 25 °C, 7 d: Colonies moderately deep, slightly raised at center, plane; margins entire; mycelium white; texture floccose; sporulation moderately dense; conidia en masse yellow-green (71); soluble pigments absent; exudates absent; reverse greyish yellow-green (68). OA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium primrose (66); texture floccose; sporulation absent; soluble pigments absent; exudates absent; reverse primrose (66). Ascomata present. CREA 25 °C, 7 d: Moderate growth, acid production present.

Micromorphology.

Conidiophores monoverticillate and biverticillate; stipes smooth, 15-50 × 3-4 μm; metulae 3-5, divergent, 10-15 × 2.5-3 μm; phialides 4-6, flask-shaped, 9-13 × 2-4 μm; conidia smooth, subglobose to fusiform, 3-4(-5) × 2.5-3.5(-4.5) μm. Ascomata maturing after 2-3 wk of incubation on OA, yellow to orange, globose to subglobose, 400-550 μm; ascospores ellipsoidal, spiny, 3.5-4.5 × 3-4 μm.

Notes.

Talaromyces brevis is morphologically and phylogenetically close to T. liani , but the latter produces larger ascospores measuring 4-6 × 2.5-4 μm and does not produce acid on CREA (except T. liani CBS 118885 produces very weak acid) ( Yilmaz et al. 2014).

Etymology.

Latin, brevis , refers to its short conidiophores.

Figures

Figure 8. Talaromyces brevis CBS 141833 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-d conidiophores and conidia e ascomata on OA after two weeks f-g ascospores. Scale bars: 10 μm (b-d, f), 1000 μm (e), 2 μm (g).