Читать книгу Marine Mussels - Elizabeth Gosling - Страница 25

Filter feeding is believed to have evolved in some group of early protobranch molluscs, giving rise to the Autobranchia, the dominant subclass of modern bivalves. These feed by filtering the incoming current as a source of food, the gills having replaced the palps as the feeding organs. One important development in the evolution of filter feeding was movement of the site of water intake to the posterior of the animal (see Chapter 1).