Each cylinder advances by a single central stream of cytoplasm, granular in appearance, and has no subpseudopodia.

This distinguishes them from other amoeboid groups, although in some members this is not the normal type of locomotion.

These latter are polyphyletic, but molecular trees by Bolivar et al.[2] identified a core monophyletic subgroup.

Subsequent studies showed the testate lobose amoebae belong to the same group, which was thus renamed Lobosea sensu stricto[3] or Tubulinea.

[4] The class Tubulinea, as of 2022, is classified into three major groups: Corycida, Echinamoebida and Elardia.