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Constellaria-Sea mat

Constellaria These bryozoans developed as a bushy colony with thick, often compressed, branches. The branch surfaces are covered by distinctive star-shaped monticules (regularly shaped hummocks). Feeding zooids are located along the rays of the stars. The monticules of colonies probably formed chimneys for the expulsion of exhalant feeding currents. Habitat -- Constellaria lived on the sea bed. Copyright © 1992 Dorling Kindersley Limited, London Text copyright © 1992 Cyril Walker, David Ward .