AppearancePale to dark purple thin, brittle, leafy calcified fronds, attached at base, margins free, lobed. Fronds semicircular, concentrically banded (above). Reproduction takes place in winter and spring in small, wart-like conceptacles on the surface, persisting. Calcareous, thin brittle fronds with concentric markings.
DistributionEuropean coasts of Atlantic Ocean and Mediterranean Sea.
HabitatEpilithic, mixed with other Corallinaceae (ex.: Lithothamnion philipii) or on pebbles, epiphytic on Posidonia rhizomes, but also under Laminariales; more frequently recorded in shaded sites with bottom energy.
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