Assulina muscorum, 54 µm, stacked image

Genus Assulina Greef, 1888

Diagnosis: Shell usually brown, ovoid, compressed, biconvex in cross-section, with overlapping elliptical scales; aperture narrow oval, more or less crenulate with organic margin; nucleus vesicular, filopodia.

Remarks: Five species have been described so far, but they are hard to distinguish from each other light microscopically. It’s questionable if they represent separate species. The original descriptions are inadequate.

Known species:

Assulina – after Lüftenegger et al, 1988
Recent posts

Ditrema spec.

Ditrema spec. Ditrema spec. Diagnosis: Shell as with D. longicollis, but much smaller, surrounded by V-shaped structures that gave it the impression of a star.

Read More »

Rotosphaerida

Pompholyxophrys Pompholyxophrys Pompholyxophrys Rabdiophrys Rotosphaerida Rainer, 1968 Diagnosis: Aciliate predominantly spherical or flattened amoebae from which elongated actin-based filopodia extend; with flat discoid mitochondrial cristae;

Read More »

Centropyxis tabel

Key to Centropyxis species 1 Test in dorsal view circular or almost circular 2 – Test in dorsal view irregular due to various outgrows and

Read More »