Species Callirhytis quercussuttoni - Gouty Stem Gall Wasp

Classification · Identification · Works Cited

Gouty Stem Gall? - Callirhytis quercussuttoni

Stem Gall on Interior Live Oak - Callirhytis quercussuttoni

Old stem galls on coast live oak - Callirhytis quercussuttoni

Gouty Stem Gall Wasp - Callirhytis quercussuttoni

Classification

Kingdom Animalia (Animals)

Phylum Arthropoda (Arthropods)

Subphylum Hexapoda (Hexapods)

Class Insecta (Insects)

Order Hymenoptera (Ants, Bees, Wasps and Sawflies)

No Taxon ("Parasitica" - Parasitoid Wasps)

Superfamily Cynipoidea

Family Cynipidae (Gall Wasps)

Tribe Cynipini (Oak Gall Wasps)

Genus Callirhytis

Species quercussuttoni (Gouty Stem Gall Wasp)

Identification

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)

Works Cited

1.	Field Guide to Plant Galls of California and Other Western States Ron Russo. 2006.

Contributed by Joyce Gross on 23 May, 2008 - 1:29am
Last updated 26 May, 2008 - 1:42am

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