Euxystotera campanulatum Lyon, new species

Gall. —(Figs. 3E, 3F) Small, campanulate cup, 5 mm diameter, 3 mm high; on lateral veins of upper and lower leaf surfaces. Monothalamous, larval cell occupying base. Appear in late summer as tiny, purple spangles that grow rapidly to reach maturity in October; mature galls red-brown; adults emerged 21 October.

Host. — Quercus pungens Liebmann, an unusual little shrub oak that grows at elevations of 3500-6000 ft on limestone cliffs of mountains at scattered locations in Arizona, New Mexico and Texas. No cynipids or galls have previously been described from this oak. Lewis Weld, in his field notes, made frequent reference to it as a host oak; however, in later years, he (Weld 1960) indicated that he misidentified the oak and that his “ Quercus pungens ” was actually Q. turbinella Greene. A number of years ago, John Tucker, of the University of California at Davis, located specimens of this oak in the Franklin Mountains at El Paso, Texas, and indicated that an excellent opportunity to study the cynipid fauna existed. I have made periodic visits to these montains since 1964 and have found that the oaks were abundantly “galled” with both described and undescribed species.

Distr: TX

- RJ Lyon: (1993) Synonymy of two genera of cynipid gall wasps and description of a new genus (Hymenoptera: Cynipidae)^©

Reference: https://www.biodiversitylibrary.org/page/56147207#page/145/mode/1up