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Description of TrichonymphaHypermastigid with a spindle-shaped body (75-150 µm) in length. Rostral kineties are independent from kineties on the rest of the cell. Rostral tube divided into 2 hemi-rostral plates composed of the association of parabasal fibres. Parabasal bodies regularly arranged around the nucleus. Ultrastructural study has shown 2 privileged basal bodies on the top of the flagellar area of the rostrum and pelta-axostylar rows underlying the membrane of the cap. At division the 2 hemi-rostra separate and reconstitute their symmetry in each daughter cell. Seven species live in Cryptocercus punctulatus e.g. T. okolona and about 13 species occur in termites such as T. agilis in Reticulitermes lucifugus. Type species: Trichonympha agilis Leidy, 1877.