Andricus marmoreus
(agamic)agamic:The agamic (AKA unisexual) generation of an oak gall wasp (cynipini) species consists of only female wasps, which do not mate before laying the eggs which become the male and females of the sexual generation (sexgen).
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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.
Our ID Notes may contain important tips necessary for distinguishing this gall
from similar galls and/or important information about the taxonomic status of
this gall inducer.
Created Feb 4, 2026 1:47 PM UTC
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Last updated Feb 4, 2026 1:47 PM UTC
New species and synonymy of American Cynipidae
Alfred Kinsey
(1920)
Andricus marmoreus, new species
Gall. — A solid, marble-like gall, mottled in color, about globular, and smooth, with a blunt tip. Monothalamous. The gall is 9 mm. or less in diameter, subspherical, somewhat flattened vertically, with usually a broad-linear tip at the apex 2-3 mm. long; the surface is light brown, not entirely smooth in dried specimens, the deeper portions colored darker, forming a speckled or even mottled design. The gall is solid, although the tissue is not compact, and contains a distinct but not separable larval cell which is about 3 mm. in diameter. Often in numbers, though not densely clustered, on the new shoots of Quercus sp.; the wedge-shaped base of the gall is inserted in deep slits in the twig, causing thin layers of the bark to flare slightly around the base of the gall.
Range: San Luis, Potosi
The gall is like a typical "bullet-gall" of the genus Disholcaspis, except that it does not have a separable larval cell.
