Description
Centroheliozoa with a periplast with internal tangential plate-scales and external radial spicules . The radial spicules have a cylindrical shaft , which inserts eccentrically at the apex of an invagination of a heart-shaped base-plate . Thirteen species , mostly freshwater . References: Mikrjukov (1995b), Siemensma and Roijackers (1988a) .
Type species
Choanocystis lepidula Penard , 1904
Figures
Choanocystis lepidula and elements of its
Raw text
Centroheliozoa with a periplast with internal tangential plate-scales and external radial spicules . The radial spicules have a cylindrical shaft , which inserts eccentrically at the apex of an invagination of a heart-shaped base-plate . Thirteen species , mostly freshwater . References: Mikrjukov (1995b), Siemensma and Roijackers (1988a) .