CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands;
IMA Fungus. 2010 Dec;1(2):117-22. doi: 10.5598/imafungus.2010.01.02.03. Epub 2010 Nov 2.
The bitunicate ascomycete genus Johansonia is presently treated as a member of Saccardiaceae, a family regarded as incertae sedis within the Ascomycota. Recent collections on leaves of a leguminous host, Dimorphandramollis, in Mato Grosso, Brazil, led to the discovery of a new species of Johansonia, described here as J.chapadiensis. Based on DNA sequence data of the nuclear ribosomal DNA (LSU), Johansonia is revealed to represent a member of Dothideomycetes, Capnodiales. Although its family could not be resolved, it clustered basal to Schizothyriaceae and Mycosphaerellaceae, and could well represent a species of Saccardiaceae. DNA sequence data of other members of Saccardiaceae would be required, however, to confirm this classification.
双囊壳腔菌属 Johansonia 目前被视为 Saccardiaceae 的一个成员，而 Saccardiaceae 被认为是子囊菌门中一个位置不定的科。最近在巴西马托格罗索州豆科植物 Dimorphandramollis 的叶子上采集到的标本，发现了一个双囊壳腔菌属的新种，即 J.chapadiensis。基于核核糖体 DNA（LSU）的 DNA 序列数据，Johansonia 被揭示为属于 Dothideomycetes 目、Capnodiales 目。尽管它的科尚未确定，但它与 Schizothyriaceae 和 Mycosphaerellaceae 聚为一簇，很可能代表 Saccardiaceae 的一个种。然而，需要其他 Saccardiaceae 成员的 DNA 序列数据才能确认这种分类。
