Balanococcus Williams, 1962

Type species Ripersia scirpi Green.

The genus comprises more then 30 Palaearctic and Australasian species. The Palaearctic fauna was revised recently by Danzig (1998) and Kwon et al. (2003) and represented by a compact group of morphologically similar species inhabiting mainly the leaf sheaths of different grasses. The adult females of Palaearctic Balanococcus spp. are similar in their morphology and mode of life to females of the widely distributed Trionymus Berg, but differ in Balanococcus having diagnostically-shaped tubular ducts, with a deep collar covering the duct, and some other small characters, such as short antennae, comparatively large hind coxae and poorly developed ostioles.