Ovatospora sinensis H.Y. Wang &Y.F. Han, 2024

Wang, Hai-Yan, Li, Xin, Dong, Chun-Bo, Zhang, Yan-Wei, Chen, Wan-Hao, Liang, Jian-Dong & Han, Yan-Feng, 2024, Two new species of Sordariomycetes (Chaetomiaceae and Nectriaceae) from China, MycoKeys 102, pp. 301-315 : 301

Ovatospora sinensis H.Y. Wang &Y.F. Han sp. nov.

Fig. 4

Etymology.

Refers to China where the species was discovered.

Type.

China: Shandong Province, Qingdao City, Qingdao Zoo (35°59'14"N, 120°3'53"E), soil, July 2021, Hai-Yan Wang & Yan-Feng Han, ex-type CGMCC 40675=GZUIFR 23. 001, dried holotype GZAC 23. 001 .

Description.

Culture characteristics: Colonies growing on MEA, OA and PDA after 7 days of incubation at 45 °C. Colony on MEA reaching about 35-45 mm diam., pure white (RAL9010), densely villiform; irregular in the margin; reverse light ivory (RAL1015), radial lines, irregular in the margin. Colony on OA reaching about 80-90 mm diam., grey white (RAL9002), sparsely aerial mycelium, mostly regular in the margin; reverse grey white (RAL9002). Colony on PDA reaching about 45-50 mm diam., creamy (RAL9001), densely villiform obviously powdery conidia group, sparsely spongy, irregular in the margin; reverse creamy (RAL9001), plicated at the centre, irregular in the margin.

Hyphae septate, hyaline, smooth, thin-walled, 1.5-3.5 μm wide. Conidiophores arising from hyphae, 2-30 × 1.5-3.5 μm, solitary or branched, smooth, mostly clavate, septate. Conidiogenous cell reduced to Conidiophores. Conidia on conidiogenous or acrogenous directly on the hyphae, hyaline or light-brown, mostly globose, rarely obovate, thick-walled, 6.0-10.5 μm diam. (av. 8.0 μm). Sexual morph unknown.

Additional specimens examined.

China. Shandong Province, Qingdao City, Qingdao Zoo (35°59'14"N, 120°3'53"E), soil, July 2021, Hai-Yan Wang & Yan-Yeng Han, living cultures GZUIFR 23.002, GZUIFR 23.003 .

Notes.

Phylogenetically, our three strains (CGMCC 40675, GZUIFR 23.002 and GZUIFR 23.003) of Ovatospora sinensis H.Y. Wang &Y.F. Han sp. nov. clustered together in a single clade with a high support value (BI/ML 1/100). Although it was closely related to O. amygdalispora (Udagawa & T. Muroi) X.Wei Wang & Houbraken and O. senegalensis (Ames) X. Wei Wang & Samson, it has an apparent separate subclade. Morphologically, O. amygdalispora and O. senegalensis only have the sexual structures, while Ovatospora sinensis sp. nov. only produce an asexual morph with clavate and solitary or ramiform conidiophores and globose conidia. So far, Ovatospora sinensis sp. nov. is the only species that produces an asexual morph and is a thermophilic fungus in the genus Ovatospora .

Figures

Figure 4. Morphological characteristics of Ovatospora sinensis sp. nov. a-c reverse and front of colony on MEA, OA and PDA after 7 days at 45 ° C d-h conidiophores and conidia i hyphae. Scale bars: 10 μm (d-i).