Abstract
During an investigation of Xylariaceae from 2019 to 2020, isolates representing eight Nemania (Xylariacese) species were collected from Yunnan, Guizhou and Hainan Provinces in China. Morphological and multi-gene phylogenetic analyses, based on combined ITS, α-actin, rpb2 and β-tubulin sequences, confirmed that six of them are new to science, viz. Nemaniacamelliae, N.changningensis, N.cyclobalanopsina, N.feicuiensis, N.lishuicola and N.rubi; one is a new record (N.caries) for China and one is a known species (N.diffusa). Morphological descriptions and illustrations of all species are detailed. In addition, the characteristics of Nemania are summarised and prevailing contradictions in generic concepts are discussed.
Highlights
Nemania Gray was established by Gray (1821) for a heterogeneous assemblage of taxa and was affiliated with Xylariaceae Tul. & C
Nemania showed a closer affinity to Roselinia than to Kretzschmaria Fr. and Xylaria (U’Ren et al 2016), which is supported in the phylogenetic analysis, based on internal transcribed spacers (ITS), rpb2, β-tubulin and α-actin sequences
No asexual morphs were observed in this study, Nemania has geniculisporium-like asexual morphs which are a common character in members of Xylariaceae (Fournier et al 2018)
Summary
Nemania Gray was established by Gray (1821) for a heterogeneous assemblage of taxa and was affiliated with Xylariaceae Tul. & C. Sánchez-Ballesteros et al (2000) used the internal transcribed spacers (ITS) sequence to perform a phylogenetic study of Nemania, which supported the segregation of Nemania from Hypoxylon. Their conclusion was based only on ITS sequences and Xylaria Hill & Schrank was not included in this study. Tang et al (2007) re-established the phylogenetic relationships of Nemania with related genera, based on the combined dataset of ITS and rpb which supported the separation of Nemania from Hypoxylon. The boundaries of the genus became relatively clear and Nemania has been accepted as a distinct genus in Xylariaceae (Ju and Rogers 2002). The major morphological characteristics of Nemania include dark brown to black stromata, carbonaceous or at least brittle and not yielding pigments in 10% potassium hydroxide (KOH) (Ju and Rogers 2002), white soft tissue existing between or below the perithecia, ascospores usually pale brown and most of them have no obvious germ-slit and spore dehiscence in 10% KOH (Tang et al 2007)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
