Choanocystis malyutini  Mikrjukov, 1995
  
Diagnosis: Cells are about 20 µm in diameter with plate-scales and one type of spicules in the periplast. The shaft of spicules is straight, cylindrical, about 2.5 µm long, split at the apex into three unequal furcae, 1.0–2.5 µm long; the shaft and the furcae are ornamented with irregularly located small papillae. Plate-scales are broadly elliptical with a faintly developed axial thickening in the centre and with concentric rows of small papillae.

Habitat: Marine aquaria in Moscow.