Published February 18, 2019 | Version v1
Journal article Open

Neostagonosporella sichuanensis gen. et sp. nov. (Phaeosphaeriaceae, Pleosporales) on Phyllostachys heteroclada (Poaceae) from Sichuan Province, China

  • 1. Sichuan Agricultural University, Chengdu, China|Mae Fah Luang University, Chiang Rai, Thailand
  • 2. Sichuan Agricultural University, Chengdu, China|Forestry Research Institute, Chengdu Academy of Agricultural and Forestry Sciences, Chengdu, China
  • 3. Mae Fah Luang University, Chiang Rai, Thailand|Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
  • 4. University of Mauritius, Reduit, Mauritius
  • 5. Sichuan Agricultural University, Chengdu, China
  • 6. Mae Fah Luang University, Chiang Rai, Thailand

Description

Neostagonosporella sichuanensis sp. nov. was found on Phyllostachys heteroclada collected from Sichuan Province in China and is introduced in a new genus Neostagonosporella gen. nov. in this paper. Evidence for the placement of the new taxon in the family Phaeosphaeriaceae is supported by morphology and phylogenetic analysis of a combined LSU, SSU, ITS and TEF 1-α DNA sequence dataset. Maximum-likelihood, maximum-parsimony and Bayesian inference phylogenetic analyses support Neostagonosporella as a distinct genus within this family. The new genus is compared with related genera of Phaeosphaeriaceae and full descriptions and illustrations are provided. Neostagonosporella is characterised by its unique suite of characters, such as multiloculate ascostromata and cylindrical to fusiform, transversely multiseptate, straight or curved ascospores, which are widest at the central cells. Conidiostromata are multiloculate, fusiform to long fusiform or rhomboid, with two types conidia; macroconidia vermiform or subcylindrical to cylindrical, transversely multiseptate, sometimes curved, almost equidistant between septa and microconidia oval, ellipsoidal or long ellipsoidal, aseptate, rounded at both ends. An updated phylogeny of the Phaeosphaeriaceae based on multigene analysis is provided.

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