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).
Acanthocystis turfacea sp.,
tape No. 0119, time code 0423,
Higashi-hiroshima city, Hiroshima pref. Japan, October 2, 1998 by Y. Tsukii
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