Roussoella pseudohysterioides D.Q. Dai & K.D. Hyde, in Dai et al., Fungal Diversity 82(1): 37 (2017)

Hu, Hongmin, He, Minghui, Wu, Youpeng, Long, Sihan, Zhang, Xu, Liu, Lili, Shen, Xiangchun, Wijayawardene, Nalin N., Meng, Zebin, Long, Qingde, Kang, Jichuan & Li, Qirui, 2023, Taxonomic and phylogenetic characterisations of six species of Pleosporales (in Didymosphaeriaceae, Roussoellaceae and Nigrogranaceae) from China, MycoKeys 100, pp. 123-151 : 123

Roussoella pseudohysterioides D.Q. Dai & K.D. Hyde, in Dai et al., Fungal Diversity 82(1): 37 (2017)

Fig. 5

Descriptions.

See Dai et al. (2017).

Specimen examined.

China, Guizhou Province, Huaxi District, Shilihetan Wetland Park (26°43'34.3"N, 106°67'68.8"E), 1542 m elev., on decaying bamboo, 8 October 2022, Y.P Wu and H.M Hu, 2022SLZH6 (GMB0495; GMBC0495, living culture).

Notes.

Phylogenetic analyses of the combined ITS, LSU, tef 1 and rpb 2 gene sequences showed that the sequence from our 2022SLZH6 collection clusters together with Roussoella pseudohysterioides (MFLU 15-1209), with strong support (100% ML, 1 BYPP; Fig. 2 ). The morphological characteristics of our specimen are also consistent with those of R. pseudohysterioides , which was originally described from decaying bamboo culms in Thailand ( Dai et al. 2017). In China, it had previously been reported from Yunnan Province ( Jiang et al. 2019). This is the second report of this species in China, representing a new record for Guizhou Province.

Figures

Figure 2. RAxML phylogram of Roussoellaceae, based on a combined dataset of partial ITS, LSU, tef 1 and rpb 2 DNA sequences. The tree is rooted by Torula hollandica (CBS 220.69) and T. herbarum (CBS 111855). Bootstrap supports ML (MLB ≥ 75 %) and Bayesian posterior probabilities (BYPP ≥ 0.95) are given as MLB / BYPP above the branches. Sequences from newly-generated isolates are in red, bold letters, while those of ex-type isolates are shown in black, bold letters.

Figure 5. Roussoella pseudohysterioides (GMB 0495) A specimen B, C appearance of ascomata on substrate D cross-section of ascostromata E longitudinal section of an ascoma F peridium G pseudoparaphyses H-I asci J-M ascospores. Scale bars: 0.5 mm (B-D); 10 μm (E-M).