Apiospora bambusirimae K. M. Yu & Y. L. Jiang sp. nov.

Fig. 5

Type.

China • Guizhou Province, Guiyang City, on diseased bamboo branch, 5 June 2022, K. M. Yu, holotype: HGUP 12.51; ex-type culture: GUCC 12.51. other living culture: GUCC 12.52

Etymology.

Name bambusirimae originated from “ bambusaceae, ” referring to the host plant, meaning bamboo-crack, referring to cracks caused on bamboo stems, from which this fungus was isolated.

Description.

Asexual morph: On WA, hyphae smooth, branched, septate, hyaline to brown, 1.5–3 µm diam (n = 30). Conidiophores basauxic, cylindrical, smooth, septate, straight or flexuous, hyaline to brown, sometimes reduced to conidiogenous cells. Conidiophore mother cells arising from the stroma, lageniform to ampuliform, hyaline to brown, 13.5–28 × 2–5.5 µm (x = 20 × 4 µm, n = 30). Conidia globose, subglobose to ovate, with a longitudinal germ slit over the entire length, with granular depositions, brown to dark brown, smooth, 9–20 × 5–15.5 µm (x = 20.5 × 13 µm, n = 30). Sexual morph: Not observed.

Culture characteristics.

Colonies on PDA attaining 3.5 cm diam. after 3 days at 25 ° C, circular, flat, radiating outwards, irregular edges, diffuse yellow pigment, the mycelia white and floccose, cottony, reverse pale yellow.

Additional specimen examined.

China • Guizhou Province: Huaxi District, on diseased branch of bamboo, June 2023, K. M. Yu, HGUP 12.51, ex-paratype living culture; living cultures GUCC 12.51, GUCC 12.52 .

Notes.

Ap. bambusirimae is genetically close to Ap. neogarethjonesii and Ap. setostroma (Fig. 1), but the conidia of Ap. bambusirimae are 9–20 × 5–15.5 µm (x ̄ = 20.5 × 13 µm, n = 30), shorter and narrower than those of Ap. neogarethjonesii and Ap. setostroma, which are 20–35 × 15–30 µm and 18–20 × 15–19 µm. We compared the new species with phylogenetically related taxa, based on morphological differences (Table 3) and base pair differences (Table 6).