dasycladalean algae

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dasycladalean algae (division Chlorophyta) A group of green algae in which the vegetative thallus contains a single nucleus, becoming multinucleate immediately prior to reproduction; the thallus consists of an erect axis with branches, the whole showing radial symmetry. Most members show some degree of calcification. Fossil dasycladalean algae are known from the Lower Palaeozoic onwards. Modern genera include Acetabularia.