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Heliozoea: Centrohelida

 Raphidiophrys sp.
Archer, 1876

Sphaerastrum Genus: Free-living; skeleton with or without coat; spicules included in a coat more or less visible; radial siliceous spicules; ordered spicules (Illustrated Guide, 1985). Mucilaginous envelope with spindle-shaped or discoidal spicules which extend normally outwards along pseudopodia (Kudo, 1966).
Species:

Raphidiophrys sp., cell body 25 μm in diam., coats about 5 μm in thickness, axopodia up to 70 μm wide, x 640, Kannon-numa Forest Park (pond), Shimogo town, Fukushima Pref., Japan, July 10, 2005, collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Sphaerastrum Sphaerastrum Sphaerastrum

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