Roussoella Sacc., Atti Inst. Veneto Sci. lett., ed Arti, Ser . 6 6: 410 (1888)

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 Sacc., Atti Inst. Veneto Sci. lett., ed Arti, Ser. 6 6: 410 (1888)

Notes.

the genus Roussoella was introduced by Saccardo et al. (1888), with R. nitidula Sacc. & Paol. as the type species, which was collected from bamboo in Malaysia. This family is characterised as having semi-immersed to immersed, solitary or gregarious, clypeate ascostromata containing trabeculate pseudoparaphyses embedded in a gel matrix, long cylindrical to clavate bitunicate asci with or without obvious fissitunicate dehiscence and brown, 2-celled ornamented ascospores ( Liu et al. 2014). In this study, we introduce three new records of Roussoella species, based on morpho-anatomical and molecular analyses (Fig. 2 ).

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.