Idriella chlamydospora Zhi.Y. Zhang, Y.F. Han & Z.Q. Liang sp. nov.

Fig. 28

Etymology.

Refers to the species that only produces chlamydospores.

Type.

China: Guangdong Province, Guangzhou City, Nanfang Hospital of Southern Medical University 23°19'14"N, 113°32'93"E, soil, 24 Aug 2019, Z.Y. Zhang (HMAS 351879 holotype designated here, ex-type living culture CGMCC 3.20778 = GZUIFR 21.921) .

Description.

Culture characteristics (14 d at 25 °C): Colony on PDA 40-41 mm diam., grey (30F1-30E1), flat, felty to pulverulent, nearly round, margin entire; reverse grey (29F1). Colony on MEA 31-33 mm diam., grey (6F1), compact, plicated, nearly round, margin entire; reverse soot brown (5F5) from centre to margin. Colony on OA 38 mm diam., grey (30F1) with a white circle, plicated, nearly round, margin entire; reverse greenish-grey (30E2).

Hyphae branched, septate, hyaline, smooth, 1.0-3.0 μm diam. Chlamydospores arising in axenic culture on PDA, MEA and OA, moniliform, 1-2-septate, brown, 7.5-20.0 × 6.5-11.0 µm (av. 18.5 × 8.6 μm, n = 50). Conidia were not observed. Sexual morph unknown.

Additional specimens examined.

China: Guangdong Province, Guangzhou City, South Campus of Sun Yat-sen University 23°10'04"N, 113°29'95"E, soil, 24 Aug 2019, Z.Y. Zhang, GZUIFR 21.922 .

Notes.

Idriella chlamydospora was isolated from soil in China. Phylogenetically, the new isolates CGMCC 3.20778 and GZUIFR 21.922 formed a single clade with a strongly-supported value and were nested in the genus Idriella (Fig. 27). However, morphologically, I. chlamydospora differs from other species in the genus Idriella in that it only produces chlamydospores.