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Heliozoea: Centrohelida

 Choanocystis sp.
Hertwig & Lesser
Syn.: Acanthocystis

Choanocystis Genus: Free-living; skeleton with or without coat; cuirass made of scales and of the basal part of the spicules; coat indistinguishable (Illustrated Guide, 1985). Siliceous scales arranged tangentially and radiating siliceous spines with pointed or bifurcated ends; (Kudo, 1966).
Species:

Choanocystis sp. (or Pterocystis ?), cell body μm long, μm wide, x 640, Daidarabotchi-ike (or Daizahoshi-ike), Iizuna-kogen (Iizuna Highland), Nagano city, Nagano Pref., Japan, September 2003, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Choanocystis Choanocystis Choanocystis

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