image_list image_listE

Heliozoea: Centrohelida

Choanocystis aculeata
(Hertwig & Lesser, 1874) Siemensma & Roijackers, 1988
Syn.: Acanthocystis aculeata

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: Tangential scales stut and pointed; spines curved and nail-headed; a single contractile vacuole; diameter 35-40 μm; spines about 1/3 the body diameter (Kudo, 1966).


Choanocystis aculeata (Hertwig & Lesser, 1874) Siemensma & Roijackers, cell body 28-32 μm in diam., x 640, near Okubo ike (pond as water reservoir), Shinano town, Nagano Pref., Japan, November 7, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Choanocystis Choanocystis


Please click on images for viewing enlarged.
Copyright Protist Information Server