Acremonium globosisporum Xin Li, Y.F. Han & Z.Q. Liang, 2022

Li, Xin, Zhang, Zhi-Yuan, Ren, Yu-Lian, Chen, Wan-Hao, Liang, Jian-Dong, Pan, Ji-Mei, Huang, Jian-Zhong, Liang, Zong-Qi & Han, Yan-Feng, 2022, Morphological characteristics and phylogenetic evidence reveal two new species of Acremonium (Hypocreales, Sordariomycetes), MycoKeys 91, pp. 85-96 : 85

Acremonium globosisporum Xin Li, Y.F. Han & Z.Q. Liang sp. nov.

Fig. 2

Type.

Yuncheng East Garden Wildlife Zoo , Yuncheng City, Shanxi Province, China N35°6'26", E111°4'24 ", isolated from green belt soil, July 2021, Yu-Lian Ren (dried holotype culture HMAS 351939, ex-holotype culture CGMCC 3.20955 = GZUIFR 22.036). ITS sequences, GenBank ON041035 ; LSU sequences, GenBank ON041051 ; SSU sequences, GenBank ON876755 ; TEF 1-α sequences, GenBank ON494580 ; RPB2 sequences, GenBank ON494584 .

Description.

Colonies on PDA and OA at 25 °C attaining 11-13 mm and 9-11 mm diam respectively after 7 d, white, flat or raised, velvety to slightly cottony. On MEA at 25 °C, reaching 8-10 mm after 7 d, white to yellowish white, raised, slimy. Hyphae hyaline, septate, sometimes winding and inflate, 1.5-11.0 µm wide. Sporulation abundant. Phialides are mostly borne singly, hyaline, erect to slightly curved, sometimes forming a collarette, 9.0-22.0 µm long, tapering from 1.5-3.5 µm near the base to 0.5-1.5 µm. Conidia cohering in long chains, with minutely truncate ends, up to 27.5 µm long, globose or subglobose, 2.5-4.5 × 2.5-4.5 µm (x- ± SD = 3.4 ± 0.77 × 3.6 ± 0.52, n = 50) diam. Chlamydospores and teleomorph stage were not observed.

Etymology.

globosisporum. A reference to the global conidia.

Additional specimens examined.

Yuncheng East Garden Wildlife Zoo , Yuncheng City, Shanxi Province, China N35°6'26", E111°4'24", isolated from green belt soil, July 2021, Yu-Lian Ren, GZUIFR 22.037, ITS, LSU, SSU, TEF 1-α, RPB2 sequences GenBank ON041036, ON041052, ON876756, ON494581, ON494585 ; GZUIFR 22.038, ITS, LSU, SSU, TEF 1-α, RPB2 sequences GenBank ON041037, ON041053, ON876757, ON494582, ON494586 .

Known distribution.

Yuncheng City, Shanxi Province, China.

Notes.

The phylogeny results showed that the CGMCC 3.20955, GZUIFR 22.037 and GZUIFR 22.038 still nested in the Pinkertoniae -clade. The morphological characteristics of Acremonium globosisporum were similar to other species of the Pinkertoniae -clade in that phialides were erect on the hyphae; sporulation was abundant, and conidia were subglobose ( Ito et al. 2000). However, Acremonium globosisporum hyphae were sometimes winding and inflated, with conidia cohering in long chains, unlike other species.

Figures

Figure 2. Morphology of Acremonium globosisporum sp. nov. a-f colony on PDA, OA and MEA after 7 d at 25 ° C (upper surface and lower surface) g-j conidia are borne on the phialides k-l winding hyphae and inflate hyphae. Scale bars: 4 mm (a-f); 10 μm (g-l).