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Lecythium is a shelled amoeba, with an organic shell. This phase contrast image is of the pseudopodia as they spread across the microscope slide. From a freshwater pond in Idaho.
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Cryothecomonas (cry-oh-theek-oh-moan-ass) is a medium-sized heterotrophic flagellate with two similar flagella emerging from a point just behind the apex of the cell. The ventral surface is grooved (and this causes a slight indentation at the front of the cell). Pseudopodia may arise from the ventral groove. They consume diatoms and other detritus. DIfferential interference microscopy.
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Haeckel says: Half the shell, with the enclosed central capsule and the phaeodium, stained by carmine. (The central nucleus dark).
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Hermesinum adriaticum Zacharias, 1906. The skeleton of this species is asymmetrical and difficult to describe. The skeleton is 48-50 microns long, 20 microns wide at its widest point and 12 microns high.
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This amoeba with filamentous pseudopodia looks like Lecythium spec. Sample from a pond on the island of Hiddensee (Baltic Sea, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.
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Cryothecomonas (cry-oh-theek-oh-moan-ass) is a medium-sized heterotrophic flagellate with two similar flagella emerging from a point just behind the apex of the cell. The ventral surface is grooved (and this causes a slight indentation at the front of the cell). Pseudopodia may arise from the ventral groove. They consume diatoms and other detritus. Phase contrast microscopy.
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Haeckel says: A single triangular mesh of the lattice sphere.
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Haeckel says: Left- Distal part of a single radial tube, with the terminal corona. Right- apex of a six-sided pyramid, seen from the inside.
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Ebria (ee-bree-a) A small group of marine flagellates, although may be abundant, and large numbers have been assoicated with fish kills. They deposit complex siliceous endoskeletons within the cells. As you can see. Differential interference contrast.
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Rhogostoma (row-gaw-stow-ma) is a rarely reported amoeba with a flexible surrounding test and with a small opening through which pseudopodia can emerge. The opening is at the bottom of the cell and looks as if it has two lips. Large nucleus with nucleolus at the other side of the cell. Eats bacteria. Phase contrast.
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Cryothecomonas (cry-oh-theek-oh-moan-ass) is a medium-sized heterotrophic flagellate with two similar flagella emerging from a point just behind the apex of the cell. The ventral surface is grooved (and this causes a slight indentation at the front of the cell). Pseudopodia may arise from the ventral groove. They consume diatoms and other detritus. Phase contrast microscopy.
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Ebria (ee-bree-a) A small group of marine flagellates, although may be abundant, and large numbers have been assoicated with fish kills. They deposit complex siliceous endoskeletons within the cells and (as in this case) the skeleton may be found on its own. The ebriids have been implicated in fish kills. Phase contrast.
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Rhogostoma (row-gaw-stow-ma) is a rarely reported amoeba with a flexible surrounding test and with a small opening through which pseudopodia can emerge. Two cells with common cytoplasm, showing the thin nature of the pseudopodia. Phase contrast.
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Cryothecomonas aestivalis Drebes et al., 1996. Colourless flagellates, in the free, motile stage, oblong to oval, 9-12 microns long and 4-5 microns wide, two apically inserted flagella, anteriorly directed flagellum 15 microns long, posteriorly directed flagellum up to 25 microns Feeds on the marine planktonic diatom Guinardia delicatula. Flagellate penetrates the diatom frustule. Trophonts gradually phagocytize the host cytoplasm by means of a pseudopodium, which emerges posteriorly through a gap in the theca. Theca delicate, consisting of two layers, occasionally lacking. Trophonts and division stages with shortened, in part basally thickened flagella. Mature trophonts give rise to 8-32 new flagellates (swarmers). Defecation before the last division.
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Ebria tripartita (Shumann, 1867) Lemmermann, 1899. Specimens of this species are almost spherical in shape and average 24 microns in diameter.
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Rhogostoma (row-gaw-stow-ma) is a rarely reported amoeba with a flexible surrounding test and with a small opening through which pseudopodia can emerge. The opening is at the bottom of the cell and looks as if it has two lips. Folds in the test are evident. Phase contrast.
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Rhogostoma (row-gaw-stow-ma) is a rarely reported amoeba with a flexible surrounding test and with a small opening through which pseudopodia can emerge. Cluster of cells with common cytoplasm, at the centre of the cluster. With one cyst. Phase contrast.
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