Infraorder Sphaerothecina  Kosakyan, Lara and Lahr, 2016

Diagnosis: Test rigid or slightly flexible, either completely chitinoid or comprising recycled organic or mineral particles held together by an organic cement, or composed of self-secreted chitinoid or siliceous elements. Test always rounded in radial symmetry but varying in height from flattened saucer-shaped, hemispheric or more elongated to egg-shaped; pseudostome circular or lobed, surrounded by a collar. Produce thick, digitate pseudopodia.