IUCN threat status:

Not evaluated

Comprehensive Description

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Description of Pyrsonympha

Flagellates with a spirally twisted and contractile body; 20-150µm; 4 or 8 flagella wrapped around the cell body and have a posterior trailing portion; genus concept now includes small and ribbon-like Dinenympha forms which have 4 flagella and swim in the intestinal fluid; genus also includes large (150-200µm) Pyrsonympha forms, 8 flagella and are generally attached by an holdfast to the intestinal wall of the termite; basal bodies are separated in two pairs and linked to the preaxostylar lamina; axostyle composed of parallel rows (up to 50) of microtubules which roll up at the posterior end, where the axostyle is surrounded by a sheath; the central axostyle is contractile and undulates in the cytoplasm; flagella adhere to the cell membrane forming undulating membranes; axoneme of the flagella present additional paraxonemal striated fibres along side the 4 external triplets; anterior holdfast; eat wood, bacteria and also feed by pinocytosis; live in the rectal pouch of the genus Reticulitermes.

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