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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.

1Shell free, not attached to any substrate

Paralieberkuehnia

Shell attached to substrate2
2Shell with one aperture4
Shell with more apertures3
3Shell with two apertures

Ditrema

Shell with three or more apertures

Microcometes

4Shell without any septum

Apogromia

Shell with septum5
5Septum symmetrically, shell with two apartments

Belaria

Septum asymmetrically, shell one apartmentMicrogromia
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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