[T]wo distinctive species, Cenalox nyssae and C. conyssae also infest túpelo. Specimens were found recently on the underside of the leaves in galls along the midribs and veins. The simple distinctions of the two galls concern their form, position, and texture. Those caused by C. nyssae are small, rounded pockets filled with erineum; the galls appear alongside the midrib at angles of lateral veins. The C. conyssae galls are rough, open pockets filled with fleshy lobes, and they appear alongside the veins. Both galls form slight swellings on the upper surface of the leaves.
[no photo provided of C. conyssae]
”- Hartford Keifer,Edward Baker,Tokuwo Kono,Mercedes Delfinado,William Styer: (1982) An Illustrated Guide to Plant Abnormalities Caused by Eriophyid Mites in North America©