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Cell Morphology

Amoebae are single-celled organisms, consisting of protoplasma, a semi fluid, jelly-like substance, which is divided in cytoplasm and a nucleus. The latter is surrounded by the nuclear membrane, while the cytoplasm is surrounded by the cellular membrane, which serves as a mechanical and chemical boundary and provides a means of exchange of materials with the environment. This membrane is constantly immersed in water. Waste, water, oxygen, and other necessary chemicals are transferred in and out of the amoeba through the membrane.
The cytoplasm contains all of the organelles, such as the Golgi apparatus, the mitochondria and the endoplasmic reticulum. These organelles may appear as dark spots, but they are not identifiable light microscopically.

Cell Morphology Polychaos dubium
Polychaos dubium, a naked amoeba, is a single cell. The cytoplasm is filled with crystals and other inclusions.
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Polychaos spec.

Polychaos spec. Polychaos spec. Diagnosis: Large amoeba with an irregular more or less polypodial shape during slow locomotion; uroid finely papillated, usually very large fasciculate

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Spiculophrys

Genus Spiculophrys Zlatogursky, 2016 Diagnosis: Centrohelids lacking silica scales but with numerous thin, pointed organic (without any traces of silica) scales tapering towards acute apices. 18S

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Acanthocystis drakena

From Zlatogursky, 2016 Acanthocystis drakena Zlatogursky, 2016 Diagnosis: Cells are 21.1-30.5 µm (ca. 26.7) in diameter. Cell is covered with oval plate-scales having a margin

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Choanocystis symna

From Zlatogursky, 2014 Choanocystis symna Zlatogursky, 2014 Diagnosis: Cell body ca. 6.7 µm in diameter. Axopodia three–five times longer than a cell diameter. Plate-scales dumbbell-shaped

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Acanthocystis costata

From Zlatogursky, 2014 Acanthocystis costata Zlatogursky, 2014 Diagnosis: Cell body ca 9.5 µm in diameter. Axopodia 2–3 times longer than cell diameter. Length of spine-scales

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Kinetocyst

Left: ultra-structure of a kinetocyst of Raphidiophrys contractilis); right: two kinetocysts in an axopodium. Kinetocysts In centrohelid heliozoa, extrusomes are called kinetocysts, and are present

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