Symptoms on fruit of Citrus maxima.
Image Credit: Pedro Crous

Colony on malt extract agar.
Image Credit: Pedro Crous

Phyllosticta is an Ascomycete fungus in the Dothideomycetes clade. Dothideomycetes is the largest and most diverse class of ascomycete fungi. It comprises 11 orders 90 families, 1300 genera and over 19,000 known species.
Phyllosticta citriasiana is a plant pathogen, some strains of which cause a leaf condition called citrus tan spot on citrus plants. This fungus affects citrus plants throughout subtropical climates, causing a reduction in both fruit quantity and quality. Symptoms include both fruit and leaf lesions, the latter being critical to inter-tree dispersal.
This genome was sequenced as part of the 1000 Fungal Genomes Project.