''Andricus gigas'', also known as the saucer gall wasp, is a species of
gall-forming wasp in the genus ''
Andricus
''Andricus'' is a genus of oak gall wasps in the family Cynipidae.
Life cycle
As in all Hymenoptera, sex-determination in species of the genus ''Andricus'' is governed by haplodiploidy: males develop from unfertilized eggs and are haploid, an ...
.'' It induces galls on the leaves of
scrub oaks,
blue oaks, and
Engelmann oaks. The galls produced by its all-female generation, which emerges in winter, are 3-4 mm wide, circular with raised edges. They are red, pink, brown, or purple. The larval chamber exists as a raised bump in the gall's center. The bisexual generation produces galls that are brown and cone-shaped.
References
External links
''Andricus gigas'' on gallformers
Cynipidae
Gall-inducing insects
Oak galls
Insects described in 1922
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