| Kingdom: Monera | 
| Phylum: Proteobacteria | 
| Class: Gammaproteobacteria | 
| Order: Xanthomonadales | 
| Family: Xanthomonadaceae | 
| Genus: Xanthomonas | 
| Subject: Xanthomonas citri (ex Hasse 1915) Gabriel et al. 1989 | 
| Kingdom: Plantae | 
| Phylum: Magnoliophyta | 
| Class: Magnoliopsida | 
| Subclass: Rosidae | 
| Order: Sapindales | 
| Family: Rutaceae | 
| Genus: Citrus | 
| Subject: Citrus spp. L. |