"Phaeocytostroma" . . "Diaporthales" . . "Ascomycota" . . . . . "Sordariomycetes" . "Phaeocytostroma ambiguum" . . . . . "Fungi" . "(Mont.) Petr. 1927" . "Phaeocytostroma ambiguum (Mont.) Petr. 1927" . "Diaporthaceae" . .