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Woollybear Gall Wasp (Atrusca trimaculosa)

The woollybear gall wasp (Atrusca trimaculosa) induces spherical galls with long, straight hairs on the leaves of various white oaks. These galls are often clustered together and may superficially resemble crystalline galls.


Woollybear gall wasp (Atrusca trimaculosa), galls on valley oak (Quercus lobata). Focus-stacked composite of 76 exposures. Vacaville, Solano County, California, USA.
GAL0122


Woollybear gall wasp (Atrusca trimaculosa), highly detailed close-up of a single gall. Focus-stacked composite of 151 exposures at 2.5x lifesize. Vacaville, Solano County, California, USA.
GAL0123

Next Gall: Manzanita leaf gall aphid (Tamalia coweni)



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All images copyright Timothy Boomer. All rights reserved worldwide.