Microworld

world of amoeboid organisms

Menu
Lithocolla

Genus Lithocolla Schulze, 1874

Diagnosis: cell surrounded by a layer of small irregular mineral grains, fixed on a thin flexible membrane; numerous fine smooth filopodia, without any granules (kinetocysts) which are so typical for true helizoans; plasmabody usually with a reddish or yellowish colour. Nucleus vesicular with central nucleolus. Fast movement.

Ecology: I have sampled Lithocolla-species in the marshes of Kortenhoef, in a small river in Neer, in the southern part of the Netherlands and in a shallow pond in a salt marsh on the island of Schiermonnikoog.

Remarks: The taxonomic status of this genus is uncertain. It is probably close related to nucleariid filose amoebae.

Two species:

Layer thick, with relatively large particles; reddish color: Lithocolla globosa
Layer thin, with small particles; plasma yellowish: Lithocolla flavescens

Lithocolla
Lithocolla spec. – Photomicrograph Eckhard Voelcker
Lithocolla
Recent posts

Kibisidytes

K. marinus, after Jepps, 1934 Kibisidytes marinus Jepps, 1934 Diagnosis: Small amoeboid organism occurring in the sea, attached to the surface film or to some

Read More »

Phaeobola

P. aeris from Dumack et al., 2000 Phaeobola Dumack et al., 2000 Diagnosis: Cells roundish to oval shaped. Shell colorless to amber-colored, rough surface, few

Read More »

Rhizaspis armata

R. armata, 68 µm long, excl. spines – Laegieskamp Rhizaspis armata (Lauterborn, 1901) Dumack et al., 2021 Basionym: Pamphagus armatum Lauterborn, 1890 Diagnosis: Theca membranous,

Read More »

Rhizaspis spinosa

The original description with original drawings, Penard, 1890. Rhizaspis spinosa (Penard, 1890) Dumack et al., 2021 Basionym: Trinema spinosum Penard, 1890 Diagnosis: Theca membranous, ovoid

Read More »

Difflugia “pseudoclaviformis”

Difflugia “pseudoclaviformis”, front and side view, 424 µm Difflugia “pseudoclaviformis” Diagnosis: Shell pyriform, compressed, with a more or less pronounced aboral protuberance; shell composed of

Read More »

Difflugia from Lolo Pass

Shells 461-448 µm, stacked image. I found this large en remarkable shells in sediment of a small mountain lake near Lolo Pass, Montana USA. It differs

Read More »

Foraminifer drome

Unknown species, collected from the river Drôme, France, 2021 Unknown species September 2021, I found about ten specimens of an agglutinated foraminifer in a sample

Read More »

Cyclopyxis spec

Cyclopyxis spec., 168 µm Cyclopyxis spec. Diagnosis: Shell circular in ventral and dorsal view, more or less hemispherical in lateral view (height/diameter ≈ 0.5); lateral

Read More »

Difflugia fallax

Difflugia fallax, from Penard, 1902 Difflugia fallax Penard, 1890 Diagnosis: Shell hyaline or yellowish-greenish, black at low magnification, round in cross section, formed of a

Read More »