| Kingdom: Fungi |
| Phylum: Ascomycota |
| Subphylum: Pezizomycotina |
| Class: Sordariomycetes |
| Subclass: Hypocreomycetidae |
| Order: Hypocreales |
| Family: Nectriaceae |
| Genus: Nectria |
| Subject: Nectria spp. (Fr.) Fr. |
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Subclass: Rosidae |
| Order: Sapindales |
| Family: Sapindaceae |
| Genus: Acer |
| Subject: Acer saccharum Marshall |