cynipid - Druon quercuslanigerum - BugGuide.Net

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Photo#180502

Copyright © 2008 Joyce Gross

cynipid - Druon quercuslanigerum

Manteca, San Joaquin County, California, USA
Size: 1.5-2mm

Emerged at my house on February 1, 2008, from galls collected in November 2007. The galls were on Quercus virginiana, an oak not native to California and planted in a Manteca park. See this set of gall/leaf images.

Identified using Weld (1) and the help of Kathy Schick. Also, Kathy and some cynipid folks from Europe found more non-native Quercus virginiana trees on the San Joaquin Delta College campus (same county as these, different town) with the same galls!

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cynipid - Druon quercuslanigerum

cynipid - Druon quercuslanigerum

Contributed by Joyce Gross on 3 May, 2008 - 7:39pm
Last updated 8 December, 2010 - 5:30pm

Origin

I've been curious where the CA population came from and this wasp suggests it originated in the Texas subspecies. Your wasp is darker, consistent with the TX var fuscum and not the Florida var. quercuslanigerum, which looks more like this.

… Adam Kranz, 23 January, 2023 - 11:50pm

These galls are also in Los Angeles County

I am searching trees in Orange County, too.

… James Bailey, 9 June, 2017 - 12:08am

LA County

Thanks James. I edited my web site to include LA County as a place it's been seen in CA. I assume the trees you saw these on are also Quercus virginiana?

… Joyce Gross, 9 June, 2017 - 9:46pm

Moved

Moved from Andricus laniger.
Current name is Andricus quercuslanigera, per Kathy Schick.

… Joyce Gross, 8 December, 2010 - 5:30pm

What a Great (& Patiently Developed) Story!

From the initial discovery of the galls by Beth Sands, through the notice and further work of Joyce, and the intermediate collaboration of the visiting cynipid experts, to the final successful rearing, emergence, and eventual ID of the wasp.

A testament to the unique potential and promise of BugGuide and it's community. Way to go Joyce and Beth! :-)

… Aaron Schusteff, 27 December, 2009 - 10:25pm

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