Andricus stellaris, the sunburst gall wasp, is a fairly common species of cynipid wasp that produces galls on blue oaks and Oregon oaks on the Pacific coast of North America.

[1][2] The wasp oviposits on the underside of leaves, between the lateral veins; the larval chamber is the brightly colored spot at the center of the gall.

[1] The chamber is surrounded by a crystalline structure.

[3] This Apocrita-related article is a stub.

You can help Wikipedia by expanding it.