Family Microgromiidae De Saedeleer, 1934
Diagnosis: Small testate granofilose amoebae with a membranous shell which is usually attached to the substrate. Granulopodia branching and in some species anastomosing, usually appressed to the substrate; bidirectional streaming of extrusomes. One to several apertures, sometimes with an internal septum. Feeding on bacteria.
This is a poorly studied taxon. Often descriptions are insufficient and hard to compare with each other. Below is an attempt to distinguish known genera.
|1||Shell free, not attached to any substrate|
|–||Shell attached to substrate||2|
|2||Shell with one aperture||4|
|–||Shell with more apertures||3|
|3||Shell with two apertures|
|–||Shell with three or more apertures|
|4||Shell without any septum|
|–||Shell with septum||5|
|5||Septum symmetrically, shell with two apartments|
|–||Septum asymmetrically, shell one apartment||Microgromia|