It's pretty cool that rust taxonomists have agreed about familial (or the equivalent) placement of most taxa. These figures illustrate the genera that nobody really agreed about, and with good reason, they're dang tricky to place based on morphology. We know that Hemileia (being a group of tropical, rainforest, autoecious, suprastomatal rusts) is in Zaghouaniaceae, a family sister to other rusts. Sphaerophragmium and Phakopsora both wound up in their own families. Gerwasia on Rosaceae is a classic case for Phragmidiaceae, and Desmella (a taxon on a fern) belongs to the Pucciniaceae. Knowledge on Skierka coming soon and these figures now accepted in FuSE!. (Figures were made in R with ggalluvial).
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