Apogromia spec., the same shell, left as seen through a 40X objective, giving the impression of a distinct neck with a collar, and right: photographed through a 100X oil immersion; the shell has an artifact or hole in the shell wall. Shell 11.7 µm long, surrounded by a thick layer of unknown material.
Apogromia spec.
Diagnosis: Shell hyaline, small, pyriform or retort-shaped,double-sided symmetrically, with one side fastened to the substrate; outline sometimes slightly irregular. Shell without a distinct neck, but tapering towards the aperture. Pseudopodia granular, very thin, branching and sometimes anastomosing.
Dimensions: My measurement: 11.7 µm (n=1).
Ecology: freshwater; peat bogs, the Netherlands.
Shell 11.7 µm, with large network of granular filopodia.
Shell 13 µm, with different levels in focus.
Apogromia spec., 13 µm, Crailoo.
Apogromia spec. c. 10 µm
