REVISION OF THE GENERA AND SPECIES COMPOSITION OF LOWER CENTROHELIOZOA .1. FAMILY HETEROPHRYIDAE POCHE

A revision of the centroheliozoan family Heterophryidae on the base of the external envelope structure is performed. The genus Cienkowskya i s shown to have no centroheliozoan affinities and is transferred from this group; it is a heliozoa incertae sedis. The genus Heterophrys is shown to be heterogeneous. H. fockii with a tangential orientation of organic spicules is transferred to the genus Sphaerastrum GREEFF, emen d., while the other species with radial spicules remain in the genus H eterophrys. A new species H. febvre-chevalierae is described. Emended diagnoses for genera Heterophrys and Sphaerastrum and species H. myrio poda, H. marina and S. fockii and a key for the family Heterophryidae are suggested.