Feron sulfureum (Weld, 1926) comb. nov.

Gall (Fig. 383). A hollow cone, sessile at base and open at apex, densely covered with long sulphur-yellow spines, on under surface of leaf, single or scattered, sometimes as many as nine on a leaf but usually only one to three. The cone is up to 7 mm high by 4 mm in diameter at base, with a crystalline surface, white or rosy when growing, the spines up to 4 mm long and often rosy at the tip. The larval cell lies transversely just below the middle of gall and below it is a small obconical cavity reaching to point of attachment. The lower part of the large distal cavity above larval cell is constricted by a narrow circular shelf.

Biology. Only the asexual generation is known, which induces galls on multiple oaks fromsection Quercus, subsection Leucomexicana: Q. arizonica, Q. grisea and Q. oblongifolia. Galls mature in the autumn dropping only with the leaf; adults emerge in late March-April.

Distribution. USA, Arizona only.

- 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^©