In a survey for Cryphonectria and Chrysoporthe species on Myrtales in South Africa, a fungus resembling the stem canker pathogen Chrysoporthe austroafricana was collected from native Syzygium cordatum near Tzaneen (Limpopo Province), Heteropyxis canescens near Lydenburg (Mpumalanga Province) and exotic Tibouchina granulosa in Durban (KwaZulu-Natal Province). The fungus was associated with dying branches and stems on S. cordatum, H.canescens and T.granulosa. However, morphological differences were detected between the unknown fungus from these three hosts and known species of Chrysoporthe. The aim of this study was to characterise the fungus using DNA sequence comparisons and morphological features. Pathogenicity tests were also conducted to assess its virulence on Eucalyptus (ZG 14 clones), H.natalensis and T. granulosa. Plants of H. canescens were not available for inoculation. Results showed distinct morphological differences between the unknown fungus and Chrysoporthe spp. Phylogenetic analysis showed that isolates reside in a clade separate from Chrysoporthe and other related genera. Celoporthe dispersa gen. et sp. nov. is, therefore, described to accommodate this fungus. Pathogenicity tests showed that C.dispersa is not pathogenic to H. natalensis, but that it is a potential pathogen of Eucalyptus and Tibouchina spp.

中文翻译：

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散斑蝽属等十一月来自南非本土的香桃木。


在对南非桃金娘上的隐菌属和金孢菌属物种进行的调查中，从察宁（林波波省）附近的本地丁香、莱登堡（姆普马兰加省）附近的隐孢子菌和德班的外来颗粒 Tibouchina 中收集到一种类似于茎溃疡病病原体 Chrysoporthe austroafricana 的真菌。 （夸祖鲁-纳塔尔省）。这种真菌与 S. cordatum、H.canescens 和 T.capsulosa 上垂死的枝条和茎有关。然而，在这三种宿主的未知真菌和已知的金孢子虫物种之间检测到形态差异。本研究的目的是通过 DNA 序列比较和形态特征来表征真菌。还进行了致病性测试，以评估其对桉树（ZG 14 克隆）、H.natalensis 和 T. capsulosa 的毒力。无法接种 H. canescens 植物。结果显示未知真菌和金孢子虫属之间存在明显的形态差异。系统发育分析表明，分离株存在于与 Chrysoporthe 和其他相关属不同的进化枝中。散斑蝽属等十一月因此，被描述为适应这种真菌。致病性测试表明，C.分散菌对H. natalensis不致病，但它是桉树和Tibouchina spp的潜在病原体。