Lithocolla spec.

Diagnosis: amoeboid surrounded by a thin layer of small irregular mineral grains, fixed on a thin flexible membrane; numerous fine smooth filopodia, without any granules which are so typical for true helizoans; plasmbody usually with a yellowish color. Nucleus granular. Slow movement. Specimens can attach to the substrate while building long filopodia (see image above).

Dimensions: Ø c. 15-20 µm (n=21).

Habitat: I collected this species from the IJsselmeer, a large fresh water lake in the Netherlands, in the area near Kornwerderzand along the Afsluitdijk, in shallow clear water.

Remarks: All observed specimens moved slowly.  The taxonomic status of this species is uncertain. It might be a new species, based on the granular nucleus.