Andricus chapmanii Melika & Abrahamson, sp. nov.

Gall (Fig. 56). The unilocular gall is shaped like a tall cup or wine glass, 5–6 mm long, 2–3 mm in diameter, with delicate longitudinal surface grooves. The gall is slightly broader distal to the point of attachment to the leaf and the apex of the gall is truncate and depressed centrally. The gall is green to brown, develops on the underside of leaves, typically in clusters of 3–10 galls.

Biology. Only an asexual generation is known, which induces galls on Q. chapmanii. The galls mature in October–November, at which stage the galls fall easily from the leaves. The larvae overwinter in the gall and the adults probably emerge in March–April. Rare.

Distribution. USA, Florida, Highlands Co., Lake Placid, Archbold Biological Station.

Quercus chapmani
Leaf galls, detachable
Midrib cluster like Callirhytis lustrans Fig 203