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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Parachaos

Parachaos (ref. ID; 4739 original paper)

[ref. ID; 4739]
Diagnosis; Multinucleate. Commonly polypodial, often monopodial. main stem amoeba of approximately same diameter as the pseudopodia in the one known species. Cytoplasmic crystals often bipyramids or plate like. Cell surface coat amorphous without distinct, separate filaments radiating from plasma membrane. No inner nuclear lamina in one known species. (ref. ID; 4739)
Type species; Parachaos zoochlorellae (ref. ID; 4739)
  1. Parachaos zoochlorellae (Willumsen, 1982) Willumsen, Siemsensma & Suhr-Jessen, 1987 (ref. ID; 4739 redescribed paper)
    Syn; Chaos zoochlorellae Willumsen, 1982 (ref. ID; 4739)

Parachaos zoochlorellae (Willumsen, 1982) Willumsen, Siemsensma & Suhr-Jessen, 1987 (ref. ID; 4739 redescribed paper)

Synonym

Chaos zoochlorellae Willumsen, 1982 (ref. ID; 4739)

Re-diagnosis

Locomotive forms monopodial or polypodial, the latter with up to four or five subcylidrical pseudopodia of approximately the same diameter as the main stem. Usually a villous-bulb uroid. Small, often plate-like crystals in great number in the cytoplasm. Length in locomotion, generally 200-500 um, but monopodial forms may be up to about 900 um. Nucleus spherical or slightly oval-shaped with nucleolar material parietal, as a single layer of many irregular pieces. Nuclear diameter about 7.5-9.5 um. Zoochlorellae a prominent cytoplasmic inclusion in some localities. Significant electron microscopic characters: Amorphous cell coat with a flossy outer surface and a thickness of about 15 nm. Nuclear envelops lacking an organised inner lamina. (ref. ID; 4739)