| 1 | Taxonomic circumscription and phylogenetics of novel didymellaceous taxa with brown muriform spores显示文摘Sexual morph of didymellaceous taxa are characterized by their ascomata with relatively thin peridium,cylindric-clavate to clavate,short-pedicellate or apedicellate asci,hyaline to brown,1-septate to muriform ascospores.Its asexual morphs are coelomycetous and comprising pycnidial or acervulus conidiomata,phialidic,hyaline conidiogenous cells and hyaline or pale brown,septate or aseptate conidia.The majority of these cosmopolitan species are plant associated fungi which can be pathogens on a wide range of hosts and some species are of particular relevance for quarantine measures.Recent studies have significantly improved the taxonomy and systematics of didymellaceous taxa based on molecular phylogenetics.In contrast to the accurate and detailed studies on the asexual morphs which are common obligate pathogens,information on their usually saprobic sexual morphs is still limited.Among these phenotypically diverse species,spore characteristics are quite unique as most have hyaline spores with 0-1 septum,while only Neomicrosphaeropsis and Didymellocamarosporium are reported as producing pigmented,muriform spores.These dematiaceous muriform spores are characteristic of a considerable number of species that may be quite divergent in other characters.During taxonomic investigations on the diversity of didymellaceous taxa,we have isolated species from Alhagi pseudalhagi,Coronilla emerus,Cytisus sp.,Elaeagnus angustifolia and Spartium junceum in Italy,Russia and Uzbekistan.A comprehensive phylogeny,based on four loci(ITS,LSU,rpb2 and tub2)is used to infer species relationships.Comprehensive morphological descriptions and in-depth phylogenetic investigations of five new species viz.Ascochyta coronillae-emeri,Microsphaeropsis spartii-juncei,Neomicrosphaeropsis alhagi-pseudalhagi,N.cytisicola and N.elaeagni are presented. | Wanasinghe DN Jeewon R Peršoh D Jones EBG Camporesi E Bulgakov TS Gafforov YS Hyde KD | 2018 | Studies in Fungi2018，3，1： | 0 |
| 2 | Camarosporium uniseriatum nom.nov.,from Celtis occidentalis in European Russia显示文摘Celtis occidentalis(American hackberry)is a deciduous tree widely distributed in northern America and introduced in many regions of Europe.In this study we collected Cucurbitaria celtidis from dead or dying twigs and branches of C.occidentalis(Cannabaceae)in the Rostov region(Southern European Russia),where this tree is a common ergasiophyte in artificial forests.The placement of this species in Camarosporium sensu stricto in Pleosporinae,Pleosporales is shown in a multi-locus tree based on combined LSU,SSU and ITS sequence data.Camarosporium uniseriatum nom.nov.is introduced based on morphological and phylogenetic analyses. | Thambugala KM Bulgakov TS Eungwanichayapant PD Liu ZY Hyde KD | 2016 | Studies in Fungi2016，1，1： | 0 |
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