Ebinghaus Malte, Dos Santos Maria D M, Tonelli Guilherme S S S, Macagnan Dirceu, Carvalho Eudes Arruda, Dianese Jose C
Centro de Investigación y Extensión Forestal Andino Patagónico, U9200 Esquel, Argentina.
Departamento de Ecologia, Universidade de Brasília, 70910-900 Brasília, Brazil.
Mycologia. 2023 Mar-Apr;115(2):263-276. doi: 10.1080/00275514.2023.2177048. Epub 2023 Mar 13.
The multicellular discoid convex teliospore heads represent a prominent generic feature of the genus . However, recent molecular phylogenetic work has shown that this is a convergent trait, and that this genus does not represent a natural group. In 2000, a rust fungus infecting the Caesalpinioid species Ce (= ) was described as . This species shows some rare features, such as an extra layer of sterile cells between the cysts and the fertile teliospores, spirally ornamented urediniospores, as well as strongly incurved paraphyses giving the telia and uredinia a basket-like appearance. Using freshly collected specimens of and on , our phylogenetic analyses based on the nuc 28S, nuc 18S, and mt CO3 (cytochrome oxidase subunit 3) gene sequences demonstrated that these two rust fungi belong in a lineage within the Raveneliineae that is distinct from s. str. Besides proposing their recombination into the new genus (type species ) and briefly discussing their potentially close phylogenetic affiliations, we suggest that five other species that are morphologically and ecologically close to the type species of , i.e., , and , may be recombined pending new collections and confirmation through molecular phylogenetic analyses.
多细胞盘状凸起的冬孢子头是该属的一个显著特征。然而，最近的分子系统发育研究表明，这是一种趋同特征，且该属并不代表一个自然类群。2000年，一种感染苏木科植物Ce（= ）的锈菌被描述为 。该物种具有一些罕见特征，如在包被和可育冬孢子之间有一层额外的不育细胞层、具螺旋状纹饰的夏孢子以及强烈内弯的侧丝，使夏孢子堆和锈子器呈现出篮状外观。利用新鲜采集的 和 在 上的标本，我们基于核28S、核18S和线粒体CO3（细胞色素氧化酶亚基3）基因序列进行的系统发育分析表明，这两种锈菌属于雷文锈菌亚科内一个与狭义 不同的谱系。除了提议将它们重新组合到新属 （模式种 ）中并简要讨论它们潜在的密切系统发育关系外，我们还建议，其他五个在形态和生态上与 的模式种接近的 物种，即 、 和 ，可能需要在新的标本采集并通过分子系统发育分析确认后进行重新组合。
