Neuroterus glandiphilus Nieves-Aldrey & Medianero sp. n.
(Figs. 5, 6, 7G-H & 9)

Distribution: Costa Rica

Gall (Figs. 9C-F). The galls develop inside acorns. They form a cluster of aggregated and joined chambers within the cotyledons and wall of the acorn. Individual galls consist of an oval larval cell surrounded by tissue that is pointed at the apex. Individual galls are grouped radially, appearing as orange segments. Affected acorns do not develop normally and remain stunted inside the acorn cup. Mature galls have woody, hard walls. The galled acorns measure 7 to 14 mm.

Etymology. Named after the acorn gall induced by this species

- Medianero, E.; Nieves-Aldrey, J. L.: (2017) Primera Cita Del Género Neuroterus Hartig (Hymenoptera, Cynipidae, Cynipini) Para América Central, Con Descripción de Tres Especies Nuevas de Panamá Y Costa Rica^©