Family Hartmannellidae Volkonsky, 1931

 

Uninucleate amoebae, monopodial with a cylindrical pseudopodium when active. Most floating forms without radiating pseudopodia. Nucleus with a prominant central nucleolus.

 

1
 

Distinctive hyaline zone in locomotive form
 

Hartmannella
Copromyxa
-

Hyaline zone in locomotive form reduced or absent

2
2

Uroid, if present, reduced

Cashia
-

Uroid, often bulbous and villous

3
3

Cytoplasm often with prominent crystals orinclusions

Saccamoeba
-

Cytoplasm without crystals

Glaeseria