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Heliozoea: Centrohelida

Carter, 1863

Acanthocystis 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).
Other endosymbioses

Acanthocystis Carter emend. Siemensma & Rojackers ?, cell body 30 μm in diam., spiny projections 10-15 μm long, x 640, Shirahata-Numa, Urawa, Saitama Pref., Japan, November 20, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Acanthocystis Acanthocystis

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