title: Phalansterium
text: # Phalansterium
  
  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
  