Acalitus ferrugineum is a species of eriophyid mite.[1] This microscopic organism induces erineum galls on the leaves of American beech, and is known from the United States and Canada.[2]

Acalitus ferrugineum
Leaves of Fagus grandifolia exhibiting galls caused by the mite Acalitus ferrugineum
Leaves of Fagus grandifolia exhibiting galls caused by the mite Acalitus ferrugineum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Family: Eriophyidae
Genus: Acalitus
Species:
A. ferrugineum
Binomial name
Acalitus ferrugineum
Farlow & Hagen, 1885

Description of the gall

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Leaves affected by this species of mite will present with pale or light yellow erineum patches which progress into a reddish-brown later in the season. These galls are not known to have any consequences on the health of the tree beyond aesthetics.[3]

References

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  1. ^ "Acalitus ferrugineum". iNaturalist.ca. Retrieved 2021-08-28.
  2. ^ Xue, Xiao-Feng; Wang, Zhen; Song, Zi-Wei; Hong, Xiao-Yue (2009-10-08). "Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea)". Zootaxa. 2253 (1): 1–95. doi:10.11646/zootaxa.2253.1.1. ISSN 1175-5334.
  3. ^ "Insect and Disease Observations — June 2020" (PDF). Vermont Department of Forests, Parks & Recreation. June 2020. Archived (PDF) from the original on 2020-09-25.