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Microgromiidae
genera of Microgromiidae

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

Paralieberkuehnia

Shell attached to substrate 2
2 Shell with one aperture 4
Shell with more apertures 3
3 Shell with two apertures

Ditrema

Shell with three or more apertures

Microcometes

4 Shell without any septum

Apogromia

Shell with septum 5
5 Septum symmetrically, shell with two apartments

Belaria

Septum asymmetrically, shell one apartment Microgromia
Ditrema spec.
Microgromia minor
Microgromia minor, each shell c. 16 µm; the left hand cell is dividing; Vancouver, dried pond – Photomicrograph: Yana Eglit
Microgromia spec.SEM by Eckhard Voelcker, 2015
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