Andricus stellaris, new species

A hemispherical gall, 3-4 mm in diameter and 2 mm. high, covered with short, blunt crystalline protuberances with a circle of 12-15 longer, broad and flat projections at the base resembling an open specimen of a many-rayed species of the fungus. Attached singly or scattered in small numbers on the underside of the leaf in the fall. The galls are yellowish-white, often tinged with red. The larval cell lies transversely in the very base of the gall and above it is a cavity above which the crystalline wall of the upper part of the gall is very thick.

Host:
Quercus garryana

- LH Weld: (1926) Field notes on gall-inhabiting cynipid wasps with descriptions of new species^©

Reference: https://www.biodiversitylibrary.org/page/7610830#page/352/mode/1up