Abstract
When temperatures of 32 °C or 8 °C were applied to regenerating cells ofDileptus, the cells often formed oral apparatus with wrongly orientated ciliary complexes (kinetids). Such kinetids point their fibres in different directions instead towards the centre of the oral field, and can be deeply embedded in the cytoplasm. Similar wrongly orientated kinetids were also found during early stages of normal stomatogenesis, and it was concluded that temperature treatment can prevent the patterning of kinetids. Since wrongly orientated kinetids lack structural connections with the surface of the oral field, it is proposed that patterning proceeds through interactions between growing microtubular kinetid fibres and some submembraneous material of the oral cortex. This interaction is sensitive to temperature treatment.
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