Callirhytis bipapillata
(sexgen)sexgen:The sexual generation (AKA bisexual generation or sexgen) of an oak gall wasp (cynipini) species consists of both male and female wasps, which mate before the females lay eggs which will mature to form the all-female agamic generation.
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Location: upper leaf, lower leaf, between leaf veins
Form: pocket
Cells: monothalamous
Possible Range:
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 (pl. 1, fig. 8 ; pi. 2, fig. 20) . — Leaf parenchyma galls, not detachable, not confluent, on several leaves derived from the same leaf bud and as many as 200 or 300 on a leaf. Individual galls are ellipsoidal, 1.2 mm. high, projecting equally on upper and lower surfaces of the leaf, 0.8-0.9 mm. in diameter, bare above, pubescent below. Exit hole on upper surface.
Habitat. — Type material was collected on July 5, 1930, and June 27, 1933, at elevation of 2,000 feet on the trail to Signal Knob at north end of Three Top Mountain southeast of Strasburg, Va. Adults issued June 30-July 8. Galls were seen also 3 miles northwest of Vienna, Va. Prof. C. E. Crosby collected old galls at Kiverhead, N. Y., in September 1913.
