were shown to belong to a monophyletic clade (including Pyricularia grisea isolates), defining the family Pyriculariaceae.

[6][7][8][9] Pyricularia oryzae isolates from other host plants such as Eleusine, Setaria and Triticum are also host-specific, and unable to infect rice.

[7][8][4][9] The closely related species P. oryzae and Pyricularia grisea are indistinguishable in morphology of conidium, perithecium and ascopore.

Conidia are solitary, pyriform to obclavate, narrowed toward tip, rounded at the base, 2-septate, hyaline to pale brown, with a distinct basal hilum, sometimes with marginal frill.

[2] These clades are clearly distinct from species belonging to the Gaeumannomyces pro parte/Magnaporthiopsis/Nakataea generic complex that are monophyletic and define the family Magnaporthaceae.