Lobed Oak Gall Wasp

Andricus quercusstrobilanus

"Andricus quercusstrobilanus", the lobed oak gall wasp, is a species of gall wasp in the family Cynipidae, found in North America.
Andricus quercusstrobilanus This is a picture of Andricus quercusstrobilanus on the South Tract of the Patuxent Research Refuge near Laurel, Maryland. Andricus quercusstrobilanus,Fall,Geotagged,United States

Appearance

Larvae induce a cluster of wedge-shaped galls on white oaks, including bur oak, swamp white oak, and overcup oak. The galls are irregular, cone-shaped bodies that are closely packed together, with their pointed bases attached to a common centre.

These wedges are hard and corky and break off very easily when the gall is dry. Each of them contains a hollow kernel with a plump, large larva inside.

The galls undergo color change from pink or red to yellow and finally to brown. Adults of the species have not been described.

Naming

The "quercus" in its specific name is the genus name for oak, while "strobilus" is derived from the Greek "strobilo" which means "cone", a reference to the cone shape of the gall;

Habitat

Guest wasps found in the galls include inquilines such as "Synergus lignicola" and parasitoids such as "Eurytoma" sp..

References:

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Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderHymenoptera
FamilyCynipidae
GenusAndricus
SpeciesA. quercusstrobilanus