Microworld

world of amoeboid organisms

Menu

The next sequence shows how a cell of Hyalotheca dissilens is attacked by Hyalodiscus rubicundus.

Vampyrella
Hyalodiscus rubicundus
Vampyrella
Hyalodiscus rubicundus penetrates the mucous layer around the algae.
Vampyrella
The amoeba reaches the cell membrane of the algae and starts to open a cell. This process lasts for about 10 minutes.
Vampyrella
Suddenly, within seconds, a large part of the cell content moves into the amoeba. This goes fast.
Vampyrella
The next 15 minutes Hyalodiscus pulls all the remaining pieces of the chloroplast in its cytoplasm.
Vampyrella
Vampyrella
Vampyrella
The job is done.
Vampyrella
Hyalodiscus moves to the neighboring cell and the process starts again.
Vampyrella
16 minutes later the cell is open.
Vampyrella
When Hyalodiscus is filled with food, it builds a digestive cyst.
Vampyrella
After some days the amoeba (left, orange spot) leaves its cyst, leaving indigestible residue behind.
Vampyrella
Holes made by Hyalodiscus in cell walls of Hyalotheka dissilens.
Hyalodiscus, after feeding on Hyalotheca
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 »