Yogsothoth carteri, after Shishkin and Zlatogursky, 2018 Yogsothoth carteri Shishkin and Zlatogursky, 2018 Diagnosis: Individual cells in a colony have a diameter of 9.7-15.2 µm;

Yogsothoth knorrus, after Shishkin and Zlatogursky, 2018 Yogsothoth knorrus Shishkin and Zlatogursky, 2018 Diagnosis: Individual cells in colony have a diameter of 5.53-13.26 µm; they

Yogsothoth carteri, from Shishkin and Zlatogursky, 2018 Yogsothothidae  Shishkin and Zlatogursky, 2018 Diagnosis: Centrohelids covered with two types of tangentially-oriented plate-scales, having a different morphology.

A. dürrschmidtidae – after Wujek, 2003 Acanthocystis dürrschmidtidae  Wujek, 2003 Diagnosis: Cells 35-40 µm (based on a whole mount). Periplast comprising scales of two types, plate

Centroplasthelida Febvre-Chevalier and Febvre, 1984   Diagnosis: Phagotrophic and non-photosynthetic protists with one large spherical or near spherical centrosome at the center of the cell

  Pterocystida Cavalier-Smith and Heyden, 2007 stat. n.   Phylogenetic diagnosis: The least inclusive clade, containing Pterocystis devonica, Raphidiophrys heterophryoidea and Choanocystis curvata, but not Acanthocystis