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Trichosida

Tubulinea
Amoeba proteus 2.jpg
Amoeba proteus
Scientific classification
(unranked): Amoebozoa
Subphylum: Lobosa
Class: Tubulinea
Smirnov et al. 2005
Orders and Families

Sarcodina (subclass)
 Tubulinida
   Amoebidae
   Hartmannellidae
  Leptomyxida
  Arcellinida
Uncertain placement
   Echinamoebidae
   Trichosidae


Sarcodina (subclass)
 Tubulinida
   Amoebidae
   Hartmannellidae
  Leptomyxida
  Arcellinida
Uncertain placement
   Echinamoebidae
   Trichosidae

The Tubulinea are a major grouping of Amoebozoa, including most of the larger and more familiar amoebae like Amoeba, Arcella, and Difflugia.

During locomotion most Tubulinea have a roughly cylindrical form or produce numerous cylindrical pseudopods. 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.

This class was anticipated by some biologists like Jahn, who grouped all amoebae with granular pseudopodia together, but most split the lobose amoebae into testate Testacealobosia and naked Gymnamoebia. These latter are polyphyletic, but molecular trees by Bolivar et al. identified a core monophyletic subgroup. Subsequent studies showed the testate lobose amoebae belong to the same group, which was thus renamed Lobosea sensu stricto or Tubulinea.

Amoeba proteus

Chaos sp.

Arcella sp. test



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