Amphibolips quercusinanis

Family: Cynipidae | Genus: Amphibolips
Detachable: bothi
Color: brown, yellow, green
Texture: bumpy, hairless, spotted
Abdundance: common
Shape: sphere
Season: Spring
Alignment: integral
Walls: thin, radiating-fibers
Location: lower leaf, leaf midrib, on leaf veins, flower
Form: oak apple
Cells: monothalamous
Possible Range:i
Common Name(s):
Amphibolips inanis
Callaspidia confluens Fitch, non Harris
Callaspidia confluenta Fitch, non Harris
Cynips inanis
Cynips quercus inanis
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The species of Amphibolips and their galls

Amphibolips inanis (Osten Sacken)

Callaspidia confluenta
Cynips quercus inanis
Cynips inanis
Amphibolips inanis

Gall. On the leaves of scarlet and red oak (Quercus coccinea and Quercus rubra) in May and June. Bright green, sometimes with darker spots. Globular or nearly so, sometimes with a small nipple at the apex, thin shelled, with the surface glossy. Inside with a larval cell held in position by thread-like white filaments. When dry the gall becomes yellowish brown, often with darker brown patches. It is then very thin shelled and brittle. Diameter 25 to 35 mm.

Externally the gall may be mistaken for that of Amphibolips confluens, but it is as a rule smaller and the larval cell is held in position by radiating fibers while the galls of confluens are filled completely with a dense spongy substance. The adults emerge in June and early in July.

Habitat: Canada; New England and Middle States; MD, VA, NC, OH, MI, IN, IO

- William Beutenmuller: (1909) The species of Amphibolips and their galls©

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