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Gouty Stem Gall Wasp

Callirhytis quercussuttoni


Walnut sized blister in varying, rounded shapes. This series has three different looking galls from the same tree that show the variation.


Dead Coast Live Oak twigs in riparian, oak forest.


"This wasp creates globular, woody stem galls on oaks in the black oak group (including Quercus agrifolia and Q. wisizleni) on the west coast. The stem galls contain the unisexual (all female) generation. Females from this generation lay eggs in leaf buds, which develop into blister galls on the petioles and leaf veins. From these bisexual generation galls, both males and females emerge."

1 species ID suggestions

orbea 5 years ago
Gouty Stem Gall Wasp
Callirhytis quercussuttoni Joyce Gross: Images


Hi orbea, this was on Coast Live Oak. I'll update the habitat now. :)

orbea 5 years ago

Which species of oak?

San Diego, California, USA

Lat: 33.03, Long: -117.01

Spotted on Mar 21, 2012
Submitted on Mar 23, 2012

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