Abstract
Cenozoic Dasycladales include about 43 genera and 200 species. The number of living genera is reduced to 8, with about 40 species.
Calcification encloses sterile and fertile organs to a varying degree, according to genera, species, and individuals. Consequently, preservation of fossils mainly depends on the extent of the initial calcification around the thallus.
Main characters commonly used to define taxa include the type and the position of the reproductive organs, absence or presence of articulation, and division of branches.
A large number of species, belonging to the genera Neomeris, Cymopolia, and Acicularia, is known in Palaeogene sediments. The richest cenozoic assemblages have been found in Sardinia (Palaeocene) and in the Paris basin (Palaeocene and Eocene).
Living representatives have a discontinuous geographical distribution. They are confined to shallow warm marine or brackish waters.
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© 1991 Springer-Verlag Berlin Heidelberg
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Génot, P. (1991). Cenozoic and Recent Dasycladales. In: Riding, R. (eds) Calcareous Algae and Stromatolites. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-52335-9_8
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DOI: https://doi.org/10.1007/978-3-642-52335-9_8
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