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DescriptionThis bryozoan forms orange, domed colonies (zoariums) or cylindrical colonies. The individual zooid is broad with a shallow sinus, a prominent ovicell and smooth frontal shield (a calcified surface) composed of external spines. The surface of the ovicell (the skeletal structure containing the brood chamber) is punctured by pores, commonly 4-5 of these pores being large, round lacunae. The embryos, present in July in British specimens, are orange in colour and may accentuate the colour of the zoarium.The colony form is similar to that of Turbicellepora avicularis. The two species may be differentiated due to the larger, sparser pores on the ovicell of Turbicellepora magnicostata. Turbicellepora magnicostata also has a wider sinus and more distinct marginal ribs.