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Maple Bladder-gall Mite

Vasates quadripedes

''Vasates quadripedes'', the maple bladder-gall mite, is an eriophyid mite in the genus ''Vasates'', which causes galls on the leaves of silver maple , red maple , and sugar maple . The gall is rounded, sometimes elongate, and has a short, thin neck. Typically, galls are 2–3 millimetres in diameter, and may be numerous on the upper surfaces of leaves. They have an opening in the lower surface. At first they are yellowish-green or bright red, later they become dark red and black.

In Britain, the mite affects introduced silver maple. The species is relatively new to Britain, being first recorded in London in 2002.
Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassArachnida
OrderTrombidiformes
FamilyEriophyidae
GenusVasates
SpeciesV. quadripedes