Talaromyces jiangxiensis Zhi.Y. Zhang, Y.F. Han & Z.Q. Liang sp. nov.

Fig. 10

Etymology.

Referring to its origin, isolated from Nanchang City, Jiangxi Province, China.

Type.

China: Jiangxi Province, Nanchang City, Nanchang People's Park 28°68'12"N, 115°91'35"E, soil, 13 Aug 2019, Z.Y. Zhang (HMAS 351870 holotype designated here, ex-type living culture CGMCC 3.20783 = GZUIFR 21.892) ; ibid., GZUIFR 21.893 .

Description.

Culture characteristics (14 d at 25 °C): Colony on PDA 50-51 mm diam., moderately deep, plane, mycelium white, planar, sporulation dense, margins entire, slightly undulate, conidial area dark green (30F3), soluble pigments and exudates absent; reverse white (30A3). Colony on MEA 26-33 mm diam., moderately deep, mycelium pale golden rod at the centre, white at the edge, texture velvety, margins irregular, sporulation dense, conidia area yellowish-white (1A2), soluble pigments and exudates absent; reverse greyish-yellow (2C3). Colony on OA 32-33 mm diam., moderately deep, mycelium white, texture velutinous, margins low, narrow, irregular, sporulation moderately dense, conidia masse greenish-grey (30F2), soluble pigments and exudates absent; reverse pastel green (30A4).

Hyphae hyaline, septate, smooth, branched, 1.0-4.5 μm wide. Conidiophores smooth, biverticillate, stipes smooth, bearing terminal biverticillate penicillin. Metulae 3-6, divergent, 8.0-13.5 × 2.0-4.0 μm . Phialides 3-6, acerose, 8.0-13.5 × 2.5-4.0 μm, with a long gradually tapering collula. Conidia spiny, fusiform to pyriform, sometimes ellipsoidal, 3.0-4.5 × 2.0-3.5 μm (av. 3.7 × 3.3 μm, n = 50). Sexual morph not observed.

Notes.

Currently, five species are accepted in the section Talaromyces Subinflati (Houbraken et al. 2020; Sun et al. 2020). Talaromyces guiyangensis is classified as a new lineage in the section Talaromyces Subinflati, forming a strongly supported clade (ML = 100%; PP = 1.0). T. guiyangensis is phylogenetically closely related to T. guizhouensis, T. subinflatus and T. tzapotlensis (Fig. 6). Morphologically, T. guiyangensis can be distinguished from T. guizhouensis by fusiform to pyriform, sometimes ellipsoidal conidia, rather than subglobose to fusiform conidia of T. guizhouensis; whereas the colony of T. guiyangensis is velvety on MEA, rather than floccose in T. guizhouensis (Sun et al. 2020). The conidia of T. subinflatus are smooth, ellipsoidal to fusiform, rather than spiny, fusiform to pyriform, sometimes ellipsoidal in T. guiyangensis (Yilmaz et al. 2014). Additionally, T. subinflatus forms ascomata, which is not seen in T. guiyangensis (Yilmaz et al. 2014). In addition, T. tzapotlensis forms smooth to finely roughened, ellipsoidal conidia, whereas T. guiyangensis produces spiny, fusiform to pyriform, sometimes ellipsoidal conidia (Peterson and Jurjević 2017).