Penard Labs

The Fascinating World of Amoebae
Leptomyxida Pussard and Pons 1976, emend. Page 1987
Naked; locomotive form altering from flattened expanded or reticulate when slowly moving, to subcylindrical monopodial one when in rapid movement or under specific conditions; adhesive uroid.

1. Rhizamoeba Page 1972
Stationary forms flattened with numerous pseudopodia, often covered with debris; monopodial in locomotion, often eruptive; uni- or multinucleate. Some species form cysts.
Rhizamoeba
Rhizamoeba
Rhizamoeba sp. Page 1972

Rhizamoeba SEM Electron Microcopy
Rhizamoeba SEM Electron Microcopy
Rhizamoeba sp.

2. Leptomyxa Goodey 1914
The distinction between Rhizamoeba and Leptomyxa is ambiguous.
Rhizamoeba
Rhizamoeba
Rhizamoeba
Rhizamoeba
Leptomyxa reticulata Goodey 1914

Rhizamoeba
This large Leptomyxa reticulata cell has a length of 400 µm.