Cercozoans

Gymnophrys (jim-noff-riss), small amoeboid cell of uncertain affinities. With fine granular pseudopodia extending from the cell which often adopts a spindle shape. There are two very short flagella, but they cannot be seen with the light microscope. Two cells. Phase contrast.

Gymnophrys (jim-noff-riss), small amoeboid cell of uncertain affinities. With fine granular pseudopodia extending from the cell which often adopts a spindle shape. There are two very short flagella, but they cannot be seen with the light microscope. Phase contrast.

Gymnophrys (jim-noff-riss), small amoeboid cell of uncertain affinities. With fine granular pseudopodia extending from the cell which often adopts a spindle shape. There are two very short flagella, but they cannot be seen with the light microscope. Cysts. Phase contrast.

Rosculus (ross-cue-lus) a naked lobose amoeba, typically progressing with a single pseudopodium (i.e. is monopodial) hyaline cap is well developed. Nucleus to rear left, contractile vacuole at posterior. Phase contrast.

Rosculus (ross-cue-lus) a naked lobose amoeba, typically progressing with a single pseudopodium (i.e. is monopodial) hyaline cap is well developed. Phase contrast.

Rosculus (ross-cue-lus) a naked lobose amoeba, typically progressing with a single pseudopodium (i.e. is monopodial) hyaline cap is well developed. Group of cells. Phase contrast.

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.

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.

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.

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.

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.

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. Phase contrast.

This phase contrast image of a cell from ATCC strain 50039, taken in April 2006. ATCC data on this organism.

This DIC image of a cyst from ATCC strain 50039 was taken in April 2006. ATCC data on this organism.

Pseudodifflugia, a testate filose amoeba. These are small species with a chitinoid ovoid or spherical test covered with quartz particles. Difflugia are generally larger and have lobose pseudopodia. Pseudodifflugia feeds on diatoms and other algae. From freshwater koi pond near Boise, Idaho. Phase contrast.

Assulina (ass-you-line-a) a testate amoeba with a subapical mouth located on the ventral surface of the slightly flattened lorica. Common in mosses. Phase contrast.

Euglypha (you-g-lie-fa) is a widespread and common testate amoeba. This one was found in a sample of moss, and this is a habitat in which testate amoebae are common. The aperture is to the top of the image. The test is made up of scale arranged a bit like fish scales, and their are marginal spine scales. This test no longer contains an amoeba. Phase contrast.

Euglypha (you-gly-fa) a shelled amoeba with filose pseudopodia (although this picture is only of the test) and with the test covered in small overlapping scales and a terminal aperture. The aperture through which the pseudopodia emerge is located to the bottom of the picture. Phase contrast.

Euglypha (you-gly-fa) a shelled amoeba with filose pseudopodia (although this picture is only of the test) and with the test covered in small overlapping scales and a terminal aperture. This species also with some spines. The aperture through which the pseudopodia emerge is located to the bottom of the picture. Phase contrast.

Euglypha (you-gly-fa) a shelled amoeba with filose pseudopodia (although this picture is only of the test) and with the test covered in small overlapping scales and a terminal aperture. The aperture through which the pseudopodia emerge is located to the bottom of the picture. Differential interference contrast.

Euglypha (you-gly-fa) a shelled amoeba with filose pseudopodia (although this picture is only of the test) and with the test covered in small overlapping scales and a terminal aperture.Differential interference contrast.