Maple Erineum Mite

Aceria calaceris

Eriophyes calaceris is a robust, wormlike, yellowish mite, measuring 180-190 microns long. The erineum growth it causes is pustulelike, consisting of a brightly colored aggregation of tiny papillae.
Maple leaf gall Impressively bright red, tiny galls, giving the appearance of a velvety covering on the ends of maple leaves. Well known and distinct enough to ID! Aceria calaceris,Geotagged,Maple Erineum Mite,Spring,United States

Appearance

Each papilla is filled with colored fluid, and when magnified it has a rounded or capitate tip. The erineum appears on the upper surface of the leaf and is thickest from the apical half to the edge of the blade, missing the larger veins. It ranges from greenish yellow to pink, crimson, and purplish red. The infestation may be wide-spread on some trees.

Naming

Eriophyes calaceris

Distribution

It is probably generally distributed throughout the range of the host plant from Alaska to California and east to South Dakota and New Mexico.

References:

Some text fragments are auto parsed from Wikipedia.

https://www.inaturalist.org/guide_taxa/1211127
Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassArachnida
OrderEndeostigmata
FamilyEriophyidae
GenusAceria
SpeciesAceria calaceris
Photographed in
United States of America