Feron verutum Kinsey, 1937 comb. rev.

Gall (Fig. 488). Individual galls long and slender, uniformly cylindric or flaring at the top, more or less covered with distinctly crystalline processes all of which are broad and blunt, filamentous, not fine nor hairlike. The whole cluster forming a spiny mass in which the individual galls are still prominent, the clusters up to 30 mm in diameter and 12 mm high. Bright purple rose and straw colour when fresh, darkening with age (Kinsey 1937).

Biology. Only the asexual generation is known, which induces galls on section Quercus, subsection Leucomexicana oaks: Q. magnoliifolia, and Q. rugosa (Kinsey 1937). Fresh mature galls in January, adults emerge in April (Kinsey 1937). The type material is labelled as collected from Q. macrophylla, but Kinsey did not define the authorship of the host species. Two possible hosts coexist within the distribution of F. verutum: Q. magnoliifolia (= macrophylla Née), or Q. resinosa (= macrophylla sensu Trel.).

Distribution. Mexico: San Luis Potosi, Guanajuato (Kinsey 1937); also from Ciudad de Mexico state in this study.

- Victor Cuesta-Porta, George Melika, James, A. Nicholls, Graham N. Stone, Juli Pujade-Villar: (2023) Re-establishment of the Nearctic oak cynipid gall wasp genus Feron Kinsey, 1937 (Hymenoptera: Cynipidae: Cynipini), including the description of six new species^©