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Saucer Gall Wasp (Feron gigas)

The saucer gall wasp (Feron gigas, previously Andricus gigas) is known for its tiny, dish-shaped galls which occur on various white oaks. These diminutive dwellings come in assorted colors ranging from yellow to dark red, and are coated with fine hairs (not unlike the hairs on the leaves where they reside). The "saucers" often have scalloped rims, adding a bit more character to their whimsical appearance. F. parmula galls are somewhat similar, but instead have smooth margins and shiny surfaces with very few hairs.


Saucer gall wasp (Feron gigas), summer-generation galls on blue oak (Quercus douglasii). Focus-stacked composite of 99 exposures at 4x lifesize. Vacaville, Solano County, County, California, USA.
GAL0102


Saucer gall wasp (Feron gigas), single gall on blue oak (Quercus douglasii). Highly-detailed focus-stacked composite. Vacaville, Solano County, County, California, USA.
GAL0094


Galls induced by the saucer gall wasp (Feron gigas). Focus-stacked composite. Vacaville, Solano County, County, California, USA.
GAL0055


Gall induced by the saucer gall wasp (Feron gigas), pale yellow form. Focus-stacked composite. Vacaville, Solano County, County, California, USA.
GAL0078

Next Gall: Spined turban gall wasp (Cynips douglasii)



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All images copyright Timothy Boomer. All rights reserved worldwide.