Abstract
Dendrostoma was recently proposed in Erythrogloeaceae (Diaporthales, Sordariomycetes), with all known members recorded as being plant pathogenic on economically important tree hosts. During our collections of Dendrostoma species in China, mild to severe canker symptoms were observed on sweet chestnut (Castaneamollissima) and oak (Quercus spp.) trees. Dead and dying plant tissues exhibiting Dendrostoma canker symptoms were sampled for fungal isolation. A total of 37 Dendrostoma isolates were obtained and analysed using morphological characteristics and molecular data (ITS, LSU, RPB2, TEF1-α). Based on these data, 10 novel clades could be distinguished, which also proved to represent morphologically distinct species described here as Dendrostomaaurorae, D.castaneae, D.castaneicola, D.chinense, D.dispersum, D. parasiticum, D.qinlingense, D.quercus, D.shaanxiense and D.shandongense spp. nov. A key to species of the genus is also provided.
Highlights
IntroductionThe family Erythrogloeaceae was established to accommodate Chrysocrypta, Disculoides, and Erythrogloeum, which exhibit epiphyllous acervuli along with subcylindrical to ampulliform conidiogenous cells and aseptate conidia (Senanayake et al 2017)
The phylogram based on the four gene sequences indicated 10 new species in Dendrostoma (Fig. 2), as described below
We reviewed the taxonomic circumscription of Dendrostoma using molecular and morphological data
Summary
The family Erythrogloeaceae was established to accommodate Chrysocrypta, Disculoides, and Erythrogloeum, which exhibit epiphyllous acervuli along with subcylindrical to ampulliform conidiogenous cells and aseptate conidia (Senanayake et al 2017). Ning Jiang et al / MycoKeys 48: 67–96 (2019). Chrysocrypta was first proposed in Cryphonectriaceae, being associated with leaf spots on Corymbia spp. in Australia (Crous et al 2012a), but was subsequently transferred to Erythrogloeaceae, based on DNA sequence data (Senanayake et al 2017). Two additional Disculoides species, D. calophyllae and D. corymbiae, were subsequently reported as foliar pathogens of Corymbia calophylla (Crous et al 2016, 2017)
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