Abstract
Neostagonosporellasichuanensis sp. nov. was found on Phyllostachysheteroclada 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.
Highlights
The family Phaeosphaeriaceae is a large and important family of Pleosporales, initially introduced by Barr (1979) with Phaeosphaeria oryzae I
The purpose of this paper is to introduce a new genus with one species in Phaeosphaeriaceae recovered from Phyllostachys heteroclada Oliv
Support values of maximum parsimony (MP), maximum likelihood (ML) and Bayesian inference (BI) analyses are shown in Fig. 1 which is the best scoring tree generated from ML
Summary
The family Phaeosphaeriaceae is a large and important family of Pleosporales, initially introduced by Barr (1979) with Phaeosphaeria oryzae I. Criteria which have previously been used to differentiate species have been based mostly on the morphology of the peridial wall, asexual characteristics and host association (Eriksson 1967, 1981, Lucas and Webster 1967, Leuchtmann 1984, Shoemaker 1984, Barr 1987, Shoemaker and Babcock 1989, Shearer et al 1990, Khashnobish and Shearer 1996, Câmara et al 2002) and taxonomic schemes followed are those of Kirk et al (2008), Zhang et al (2009), Hyde et al (2013), Phookamsak et al (2014a) and Abd-Elsalam et al (2016) This delimitation of taxa in Phaeosphaeriaceae and Leptosphaeriaceae, based solely on the above-mentioned features, is not feasible. There is a need to use the multigene sequence data analyses to infer relationships
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