The monociliated cells of the dorsal epitheloid are flattened and contain lipid bodies.
2.
One possible scenario inspired by the proposed hypothesis starts with the idea that the monociliated cells of the epitheloid in " Trichoplax adhaerens " evolved by reduction of the collars in the collar cells ( choanocytes ) of sponges as the ancestors of the Placozoa abandoned a filtering mode of life.
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