Tubulinea

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.

Representation of a tubulinid
  1. Ectoplasm
  2. Endoplasm
  3. Lobopodia , a pseudopod or arm-like projection made of cytoplasm
  4. Phagocytic vacuole
  5. Mitochondrion , creates ATP (energy) for the cell (branched cristae)
  6. Endosymbiotic bacterium
  7. Triuret (nitrogen waste) crystal
  8. Prey
  9. Nucleus
  10. Honeycomb lamina
  11. Nucleolus
  12. Endoplasmic reticulum , the transport network for molecules going to specific parts of the cell
  13. Golgi apparatus , modifies proteins and sends them out of the cell
  14. Lysosome , holds enzymes
  15. Digestive vacuole
  16. Lipid granule
  17. Vesicle
  18. Contractile vacuole , regulates the quantity of water inside a cell
  19. Uroid