| Kingdom: Fungi |
| Phylum: Ascomycota |
| Subphylum: Pezizomycotina |
| Class: Sordariomycetes |
| Subclass: Xylariomycetidae |
| Order: Xylariales |
| Family: Xylariaceae |
| Genus: Xylaria |
| Subject: Xylaria spp. Hill ex Schrank |
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Subclass: Rosidae |
| Order: Rosales |
| Family: Rosaceae |
| Genus: Malus |
| Subject: Malus domestica Borkh. |