Pontania with Type V galls [Smith does not name or describe a species and is ambiguous about whether he considers these host varieties or distinct species on each host.]

[A cross sectional drawing appears in Figure 4, on page 5 of the pdf]

Type V Pontania galls are on the S. lasiolepis group also, and are large (10 mm) and thick-walled. They come closest to some in Benson's P. viminalis group. The galls hang from the under surface of the leaf midrib and are round, smooth-surfaced, and usually on a short pedicel. There are 2 species of Pontania known from the far west with galls of this type. An amber one on S. rigida [cordata?] in the Great Basin makes a cecidium with a glossy surface, and a black species makes galls with pruinose surfaces on S. sp. near lemmonii in central Oregon.

- Edward L Smith: (1970) Biosystematics and morphology of Symphyta. II. Biology of gall-making nematine sawflies in the California region^©