A moderately sized, green, short-hairy, ovate-globular gall on the lower side of the lamina of Quercus imbricaria, with an elongated, round-ended free-rolling cell inside. The walls are somewhat thickened and succulent on the bottom and thin on the top, but the space inside the gall is largely empty. Observed in Ohio in May; a Dryocosmus female emerged on May 25. The gall differs from quercuspalustris in being more ovate than spherical and in lacking the white spots typically seen in the walls of that gall.

This wasp and gall apparently match the "Unknown integral leaf gall Q. imbricaria" in Ward et al 2022., which fell between Dryocosmus quercusnotha and quercuspalustris in their phylogeny.

A similar gall has been observed on Quercus marilandica in Texas.

- Gallformers Contributors: (2023) Gallformers ID Notes^©