Callirhytis balanoides
(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.
Gall. — Produced in autumn on small acorns of the current season, bursting out between the acorn and the cup. They secrete honey dew while growing. There are sometimes 2 to 3 galls on one acorn. When detached they are triangular in outline, flattened, the larval chamber transversely placed in the upper half of the gall and below it a spongy region which decays away after the gall drops, giving it an excavated base.
Habitat.— The type flies were bred from galls collected October 5. 1917, at Ironton, Missouri, the flies issuing May 5, 1919. Similar galls have been seen at Ithaca, New York; Glencoe, Illinois; East Falls Church, Virginia ; and at Wharton, Texas.
