This hairy, globular stem gall on Quercus berberidifolia was previously mistaken for the agamic gall of Burnettweldia washingtonensis. However, these are fresh spring galls, not overwintering fall galls, and male and female wasps emerged in early March. They also differ in having thin walls that wrinkle shortly after emergence. It resembles the sexgen gall of Antron douglasii and may be the sexgen of a similar gall. This gall was proven to be distinct from phenologically unusual B washingtonensis by rearings of male wasps.
”- Gallformers Contributors: (2024) Gallformers ID Notes©