Phalansterium is a genus of single-celled flagellated organisms comprising several species, which form colonies. Phalansterium produces tetraspores.

Phalansterium is hard to classify; it has a distinctive ultrastructure of its pericentriolar material. Molecular evidence places it in the Amoebozoa.

It has been suggested that it is similar to the ancestral eukaryote.

Species

Genus Phalansterium Cienkowsky 1870

  • Species Phalansterium arcticum Shmakova, Karpov & Smirnov 2018
  • Species Phalansterium consociatum (Fresenius 1858) Cienkowsky 1870
  • Species Phalansterium digitatum Stein 1878
  • Species Phalansterium filosum Cavalier-Smith & Chao 2011
  • Species Phalansterium intestinum Cienkowsky 1870
  • Species Phalansterium solitarium Sandon 1924