Angiosperms
Order – Fagales
Family Betulaceae
Genus – Alnus (Alder)
Fungi
Division – Ascomycota
Class – Taphrinomycetes
Order – Taphrinales
Family – Taphrinaceae
Genus – Taphrina
Phylum – Arthropod
Class – Arachnida
Order – Trombidiformes
Genus – Acalitus (Mites)