Dasineura sp.
Host: Acer rubrum
Veins at junctures on underside of leaf expanded and compressed against the leaf surface [illustration shows galls in the vein angles]
Galls are visible only from the underside of the leaf. They appear in spring, and each contains one larva.
Range: MD
”- Raymond J. Gagne: (1989) The plant-feeding gall midges of North America©