Trichamoeba sinuosa

Trichamoeba sinuosa, 170 µm

 

 

Genus Trichamoeba Fromentel, 1874

 

Diagnosis: active locomotion form limax-like, regularly monopodial, slender to broad and thick, most between 75 and 250 µm in length; bulbous uroid or with short villi, some with fine filaments; floating form, where known,  with radiating blunt pseudopodia; nucleus usually granular, with nucleoli arranged peripherally; normally uninucleate; cytoplasm often with bipyramidal crystals.
Type species: Trichamoeba hirta (Fromentel, 1974)

 

Ecology: Freshwater and marine.

 

Key to the species:

 

1

Locomotive form usually > 150 µm 2

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Locomotive form usually < 150 µm T. cloaca

2

Amoeba slender, with a zigzag movement T. sinuosa

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Amoeba broad elliptical or ovoid T. myakka