Neuroterus valhalla is a species of gall wasp from North America that forms galls on the Southern Live Oak (Quercus virginiana).

It was first discovered on the campus of Rice University.

[1][2] This species of gall wasp produces a chemical which in turn manipulates the host tree into providing for the wasp eggs.

The tree does this by providing a protective layer around the eggs and nutrition for the larva.

[3][4]