The
row of sensilla whose cuticular component are flat, circular and lack a median peg.
written by: Polidori, C., and J. Nieves-Aldrey. 2014. Diverse filters to sense: great variability of antennal morphology and sensillar equipment in Cynipoidea (Hymenoptera) with special focus on Gall-Wasps (Cynipidae). PLoS ONE 9:e101843. doi:10.1371/journal.pone.0101843.