Description of Scuticociliatia
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Oligohymenophoran ciliates, somatic cilia as dikinetids over much of body; some somatic cilia form a thigmotactic field on symbiotic species; paroral dikinetid with a, b and c segments; stomatogenesis by proliferation of kinetosomes from c segment or a scuticovestige posterior to a and b segments; many marine, estuarine species; freeliving or symbiotic.