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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Cynipoidea » Gall Wasps (Cynipidae) » Oak Gall Wasps (Cynipini) » Dryocosmus » Two-horned Gall Wasp (Dryocosmus dubiosus)
Photo#1204105
Wasp galls on oak inflorescence - Dryocosmus dubiosus
Copyright © 2016 James Bailey

Wasp galls on oak inflorescence - Dryocosmus dubiosus
Malibu Creek State Park, Los Angeles County, California, USA
March 26, 2016
Some oaks (Quercus agrifolia) in the southeast car park (near Piuma/Las Virgenes Rd. intersection) have these galls on the flowers. The galls are from either Callirhytis serricornis or Callirhytis congregata.

One is said to be kernel shaped, the other is elongated. I don't know the difference between the two shapes in this context. If anyone has a relevant reference handy I expect it would be easy to resolve...
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Contributed by James Bailey on 26 March, 2016 - 11:55pm
Last updated 1 April, 2022 - 8:12pm

Moved
Moved from Unidentified Galls. Elongate, clublike shape matches the bisexual generation gall of this species better than the ones you listed.
… Joshua C'deBaca, 1 April, 2022 - 8:12pm login or register to post comments

Moved
Moved from ID Request.
… john and jane balaban, 1 May, 2016 - 2:07pm login or register to post comments

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