The pouch galls induced by this mite on the upper surface of the leaves invariably appear at random between the lateral veins and on the midrib. The galls are often solitary, 3.6 mm in dimension, irregularly globular, and shiny with roughened surface. They range from green to yellowish green with red-dish or brown tinge. The interior of the gall, which becomes red as it matures, consists of multicellular structures, as shown in plate 6, E. Galls at times are numerous on some trees, causing considerable distortion to the foliage.

- Hartford Keifer,Edward Baker,Tokuwo Kono,Mercedes Delfinado,William Styer: (1982) An Illustrated Guide to Plant Abnormalities Caused by Eriophyid Mites in North America^©