The gall's range is computed from the range of all hosts that the gall occurs on. In some cases we have evidence that the gall does not occur across the full range of the hosts and we will remove these places from the range. For undescribed species we will show the expected range based on hosts plus where the galls have been observed.
Created Feb 4, 2026 1:47 PM UTC
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Last updated Feb 4, 2026 1:47 PM UTC
Field Guide to the Herb and Bramble Gall Wasps of North America
Louis Nastasi, Charles Davis
(2022)
Antistrophus spp.
Rosinweed cryptic leaf gall wasps
Hosts: Compass plant (S. laciniatum) and prairie dock (S. terebinthinaceum)
Gall location and description: Species belonging to this group induce galls in the petioles and occasionally larger veins of the leaves. Thus far, galls seem to only be induced in the basal leaves, but it is possible that galls are also induced in leaves on the main stem. As with several other herb gall wasps, galls of species in this group are cryptic and leave no discernable trace on the surface of the leaf. When dissected, the leaf will reveal numerous brown, oval-shaped chambers along the inside of the pith, each with a single insect.
Range: Galls of this species group have only been found in Iowa, Ohio, and Wisconsin thus far, but they can probably be found throughout the native ranges of the host plants.
The rosinweed cryptic leaf gall wasps appear to be related to those inducing cryptic galls in rosinweed stems, but their exact relation is unknown. Whether galls on the two hosts comprise one or two species also remains to be seen. These galls were just recently discovered, and more research is necessary to understand their biology and locate possible additional host plants.
