Phylum Hacrobia

Class Order   Family

Genus

Endohelea Heliomonadida   Heliomorphidae

Heliomorpha

Microhelida   Microheliellidae

Microheliella

Centrohelea Pterocystida   Pterocystidae

Pterocystis
Raineriophrys
Chlamydaster
Echinocystis

Choanocystidae

Choanocystis

Heterophryidae

Heterophrys
Sphaerastrum
Parasphaerastrum

Acanthocystida Chalarothoracina Acanthocystidae

Acanthocystis
Raphidocystis
Pseudoraphidocystis

Raphidophryidae

Raphidiophrys
Pseudoraphidiophrys
Heteroraphidiophrys
Polyplacocystis

Marophryina Marophryidae

Marophrys

  incertae sedis    

Oxnerella

Ochrophyta Actinophryida   Actinophryidae

Actinosphaerium
Actinophrys