Genus Raphidocystis Penard, 1904 emend. Nicholls and Dürrschmidt, 1985
Diagnosis: Centroheliozoa with a periplast comprising three types of scales: straight tubular or trumpet-like radial scales, smaller funnel-shaped radial scales, and tangential, elliptical plate-scales. The plate scales have a broad, hollow marginal rim, a smooth or reticular central area, and a well developed or vestigial medial rib as in Polyplacocystis.
References: Mikrjukov (1996b), Nicholls and Dürrschmidt (1985).
Type species: Raphidocystis lemani (Penard, 1891) Penard, 1904.