Triscelophorus sinensis Z. F. Yu, M. Qiao & R. F. Castaneda, 2021

Qiao, Min, Zheng, Hua, Guo, Ji-Shu, Castaneda-Ruiz, Rafael F., Xu, Jian-Ping, Peng, Jie, Zhang, Ke-Qin & Yu, Ze-Fen, 2021, Two new asexual genera and six new asexual species in the family Microthyriaceae (Dothideomycetes, Ascomycota) from China, MycoKeys 85, pp. 1-30 : 1

Triscelophorus sinensis Z. F. Yu, M. Qiao & R. F. Castaneda sp. nov.

Figs 8 , 9g

Etymology.

Latin, sinensis, referring to the country of origin, China.

Description.

Asexual morph hyphomycetous. Colonies on CMA, attaining about 1 cm diam. after 20 days at 25 °C, pale mouse grey to dark mouse grey. Mycelium superficial and immersed, composed of branched, septate, hyaline hyphae. Conidiophores macronematous, mononematous, lateral or terminal, cylindrical, erect, flexuous, separate, smooth, hyaline, up to 12-38 µm long, 1.0-2.4 µm wide. Conidiogenous cells monoblastic, cylindrical, terminal, integrated, determinate, smooth, hyaline. Conidia solitary, acrogenous, staurospore, septate, composed of a main axis and 2-3 lateral branches: i) the main axis obclavate, 2(-3)-septate, slightly constricted at the septa, straight, smooth, hyaline, 17.5-30.0 × 3.5-5.0 µm; ii) 2-3-lateral branches obclavate, (0-)1-septate, slightly constricted at the septa, straight, smooth, hyaline, 8.5-21.0 × 3.0-4.5 µm, arising from the basal cell of the main axis arranged in a regular or irregular verticillate. Sexual state: unknown.

Type.

China, Guangdong Province, Guangzhou, on submerged leaves, September 2011, G.Z. Yang. Holotype YMF 1.04065, preserved in a metabolically-inactive state (deep freezing) in the Conservation and Utilization of Bio-Resources in Yunnan.

Notes.

In morphology, Triscelophorus sinensis is somewhat similar to T. ponapensis in conidia, both having 2-3 lateral arms ( Matsushima 1981). However, T. ponapensis has shorter (main axis: 12-26 µm; lateral arms: 8-15 µm) and more septate (main axis: 2-4-septate; lateral arms: 1-4-septate) conidia.

Figures

Figure 8. Triscelophorus sinensis (Holotype YMF 1.04065) a, b conidia c, d conidiophores with conidia. Scale bars: 10 µm (a-d).

Figure 9. Cultural characters of all species in this study after 20 days on PDA at 25 ° C.