Andricus coconinoensis Melika, Nicholls & Stone, sp. nov.

Diagnosis. Andricus coconinoensis induces a small bud gall on Q. turbinella and Q. oblongifolia (Fig. 88). Only two other described Andricus species are known to induce bud galls in the southwest of the USA: Andricus cellularius Gillette, 1892 and A. multicostatus Weld, 1952.

Gall (Fig. 88). A small unilocular bud gall, roughly spherical, about 3 mm in diameter, with a smooth hard surface. Pale brown colour, sometimes with a slight darker brown mottled pattern. Similar to or possibly the same as the undescribed gall in Figure 20 of Weld (1960).

Biology. Only a sexual generation is known, which induces galls on Q. arizonica, Q. turbinella and Q. oblongifolia. Adults emerged in April.

Distribution. USA, Arizona: Santa Catalina Mountains, Chiricahua Mountains, Mogollon Rim.

Quercus arizonica, oblongifolia, toumeyi, gambelii, subturbinella [turbinella]
Bud galls
Globular, smooth, bare. Fig. 20.