Diagnosis: Shell hyaline, brown, balloon-shaped or ovoid, double-sided symmetrically, with one side fastened to the substrate; outline sometimes slightly irregular. Shell with a short but distinct tubular neck, somewhat raised and not fastened to the substrate. Pseudopodia granular, very thin, branching and sometimes anatomizing.
Dimensions: My measurement: 11.7 µm (n=1).
Ecology: freshwater; peat bogs, the Netherlands.
Remarks: The raised tubular neck is different from every species observed so far.