Chlamydosporoides guizhouensis H. Pan & Zhi. Y. Zhang, 2025

Chlamydosporoides guizhouensis H. Pan & Zhi. Y. Zhang sp. nov.

Fig. 3 View Figure 3

Etymology.

The epithet “ guizhouensis ” (Lat.) refers to Guizhou Province, where the species was collected.

Type.

China: • Guizhou Province, Guiyang City, Huaxi District, South Campus of Guizhou University , 26°42'23"N, 106°67'17"E, from epiphytic soil of Catalpa ovata G. Don , 28 September 2024, Heng Pan ( holotype HMAS 354107 , dried culture; ex-type CGMCC 3.29100 = ZY 24.007 ; ibid. ZY 24.008 ) .

Description.

Culture characteristics (14 days at 25 ° C): Colony on PDA 31–39 mm diam. flat, gray white to platinum gray from center to margin, nearly circular, margin regular; reverse: light ivory to oyster white from center to margin. Colony on OA 21–25 mm diam. flat, brown beige to dark ivory from center to margin, margin irregular; reverse: green beige. Colony on SNA 33–39 mm diam. fluffy, honey yellow to white from center to margin, hyphae sparse; reverse: white.

Hyphae branched, septate, hyaline to brown, smooth, 1–3 μm wide. hyphopodia-like structures creating a cauliflower-like appearance. Conidiogenous cells hyaline, smooth, solitary, cylindrical to clavate, straight or curved, aseptate, 7.5–12.5 (– 18) × 3–6 μm. Conidia chlamydospores-like, solitary, hyaline to brown, rough, non-septate, pyriform, globose to ellipsoid, or irregular shapes, sessile or borne on conidiogenous cells, 5.5–11.5 × 6–9.5 μm (av. 8.6 × 7.4, n = 50). Setae, Conidiomata, Chlamydospores, and Sexual morph unknown.

Geographical distribution.

Guizhou Province, China.

Additional material examined.

China: • Guizhou Province, Guiyang City, Huaxi District, South Campus of Guizhou University , 26°42'35"N, 106°67'20"E, from epiphytic soil of Catalpa ovata , 28 September 2024, Heng Pan ( ZY 24.009 ) .

Notes.

Phylogenetic analysis revealed that four new isolates ( ZY 24.007 –24.009) formed a distinct subclade with strong statistical support (100 / 1). Morphologically, for differences between Chlamydosporoides guizhouensis and C. sinensis , see the notes on C. sinensis above. Furthermore, in a comparison of ITS and LSU nucleotides, CBS 101143 has 79.2 % and 98.5 % similarity in ITS (466 / 588 bp, 48 gaps) and LSU (821 / 833 bp, one gap), which is different from C. guizhouensis ( CGMCC 3.29100 ).