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California Jumping Gall Wasp (Neuroterus saltatorius)

The California jumping gall wasp (Neuroterus saltatorius) induces one of tiniest galls found on various white oaks. At just 1mm across, these oval "specks" hiding on the undersides of leaves are quite easy to miss. These diminutive dwellings fall to the ground in autumn, and at that point the larvae within commence impressive acrobatics that cause the galls to "jump," hence the common name.


California jumping gall wasp (Neuroterus saltatorius), single gall on valley oak (Quercus lobata). Focus-stacked composite of 241 exposures at 10x lifesize magnification. Solano county, California, USA.
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California jumping gall wasp (Neuroterus saltatorius), gall on valley oak (Quercus lobata). Focus-stacked composite of 412 exposures at 10x lifesize magnification. Solano county, California, USA.
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California jumping gall wasp (Neuroterus saltatorius), two galls on valley oak (Quercus lobata). Focus-stacked composite of 242 exposures at 10x lifesize magnification. Solano county, California, USA.
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California jumping gall wasp (Neuroterus saltatorius), galls shown with standard #2 pencil for scale. A red cone gall is also beginning to form. Solano county, California, USA.
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California jumping gall wasp (Neuroterus saltatorius), highly detailed close-up of a single gall on valley oak (Quercus lobata). Focus-stacked composite of 138 exposures at 10x lifesize magnification. Solano county, California, USA.
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California jumping gall wasp (Neuroterus saltatorius), gall shown with standard #2 pencil for scale. Focus-stacked composite of 55 exposures. Solano county, California, USA.
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Next Gall: Clasping twig gall wasp (Disholcaspis prehensa)



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All images copyright Timothy Boomer. All rights reserved worldwide.