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A comblike structure, especially a respiratory organ or gill in a mollusk, consisting of an axis with a row of projecting filaments.
- ‘Chaetoderms lack pedal grooves, have ctenidia paired in a small posterior mantle cavity, have a cuticular shield around the mouth and the stomach and digestive glands are separate.’
- ‘Meanwhile, Pelseneer had come up with a classification of bivalves based on the structure of the ctenidia.’
- ‘Polyplacophorans have six to 88 pairs of bipectinate ctenidia, the number of which is typically not species specific, increasing as the individual grows.’
- ‘All cephalopods have one pair of unciliated ctenidia within the mantle cavity, with the exception of Nautilus, which has two pairs of ctenidia.’
- ‘No ctenidia are present, and gas exchange is through the mantle surface.’
Late 19th century; modern Latin, from Greek ktenidion, diminutive of kteis, kten- comb.
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