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Convoluted gall wasp (Andricus confertus)

The convoluted gall wasp (Andricus confertus) is a cynipid wasp which induces pinkish, finely hairy gall clusters. Each cluster is actually comprised of multiple galls pressed closely together, resulting in a convoluted mass somewhat reminiscent of a brain. Since this gall appears exclusively on the leaves of valley oak (Quercus lobata), its presence can be used to differentiate the host tree from other oaks.

Convoluted gall wasp (Andricus confertus). Davis, Yolo County, California, USA. Stock Photo ID=GAL0008
Convoluted gall wasp (Andricus confertus) gall cluster on underside of a valley oak leaf. Davis, Yolo County, California, USA.
GAL0008

Convoluted gall wasp (Andricus confertus). Davis, Yolo County, California, USA. Stock Photo ID=GAL0009
Convoluted gall wasp (Andricus confertus), portrait orientation. Davis, Yolo County, California, USA.
GAL0009

Convoluted gall wasp (Andricus confertus). Davis, Yolo County, California, USA. Stock Photo ID=GAL0010
Convoluted gall wasp (Andricus confertus), highly detailed close-up of a cluster of galls. Davis, Yolo County, California, USA.
GAL0010

Next Gall: Disc gall wasp (Andricus parmula)



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All images copyright Timothy Boomer. All rights reserved worldwide.