Microworld

world of amoeboid organisms

Menu
Belonocystis tubistella
Belonocystis spinifera – Radiopoel

Genus Belonocystis Rainer, 1968 emend. Klimov et Zlatogursky, 2016

Diagnosis: Spherical cells, moving by fine pseudopodia. Cells are covered with tightly packed organic scales, which together give an impression of a single polygonal capsule. Scales have a widened base and narrow spike, which originates from the distal part of the base. Cytoplasm is not divided into ecto and endoplasm, and contains light-refractive granules. Nucleus eccentric, with a compact spherical nucleolus. Contractile vacuoles, if present, around the cell periphery. Up to four contractile vacuoles may be present. Tubular mitochondrial cristae. Some species can form abnormally large cells.

Dimensions: cells 8-16 µm diameter.

Ecology: Bacterivorous. Freshwater and marine; North America, Europe.

Belonocystis spinifera, 11 m, and base of the spines
Naked granofiosean with a loose spine scale of Belonocystis spinifera.
Recent posts

Euglypha bryophila

Euglypha bryophila, after Brown, 1911 (L), from Ecuador (R) Euglypha bryophila  Brown, 1911 Diagnosis: (Original description) The test is very regular in form and subject

Read More »

Vernalophrys

(A) A Scenedesmus cell (arrow) is engulfed by a trophozoite. (B) Several Scenedesmus cells adhere to the surface of a plasmodium that has numerous vacuoles

Read More »

Actinosphaeridium spec.

Actinosphaeridium spec. Diagnosis: Cell surrounded by a membranous shell, with an outer mucous layer. Filopodia with granules, sometimes branching. Cell stalked. Ecology: I found this

Read More »

Euglyphidion

Euglyphidion enigmaticum – after Bonnet, 1960 Genus Euglyphidion Bonnet, 196 Diagnosis: Shell hyaline, ovoid, pseudostome circular or slightly elliptical. Shell loosely covered with two types of

Read More »

Leptomyxa spec.

Leptomyxa sp., slowly retracting in response to the light of the microscope Leptomyxa sp. Diagnose: This is a very large amoeba which I found in

Read More »

Zivkovicia spec.

Zivkovicia spec., 200 µm long; the right image is viewed through the aperture Zivkovicia spec.  Diagnosis: Shell pyriform, circular in oral view, with a clear

Read More »