Genus Parachaos Willumsen, Siemensma & Suhr-Jessen, 1987

Diagnosis: Locomotive form commonly polypodial, 100 to 500 µm, or monopodial up to 900 µm in length. Multinucleate with 8 to 50 spherical, or slightly oval, nuclei per cell. Nucleolar material parietal as single layer or irregular fragments or a central nucleolus. Cytoplasm rich in bipiramidal or plate-like crystals and zoochlorellae in many isolates. Usually with villous-bulb uroid.

Type species: Parachaos zoochlorellae (Willumsen, 1982)

Ecology: Freshwater.

Remarks: Similar to Chaos but at the ultrastructural level Parachaos can be distinguished by an amorphous cell coat without filaments and nuclei with no internal laminae.

Trichamoeba laureata

Recent posts

Difflugia ampla

Difflugia ampla, after Rampi, 1950 (l) and Gauthier-Lièvre et Thomas, 1958 (r) Difflugia ampla Rampi, 1950 Diagnosis: Test broadly pyriform, with a wide and rounded

Read More »

Difflugia parva

Difflugia parva, from Gauthier-Lièvre et Thomas, 1958 Difflugia parva  (Thomas, 1954) Ogden, 1983 = Difflugia oblonga var. parva Thomas, 1954 Diagnosis: Test pyriform, tapering evenly from

Read More »