Clypeina tibanai, sp. nov. (Polyphysaceae, Dasycladales, Chlorophyta), a mid-Cretaceous green alga from the Potiguar Basin, Brazilian margin of the young South Atlantic Ocean

B. GRANIER, D. DIAS-BRITO, I. I. BUCUR

Abstract


The fossil genus Clypeina (Michelin, 1845) comprises some 40 species. We describe a new representative from mid-Cretaceous strata of the Potiguar basin, Brazil, a form with closely set whorls of tubular, bended laterals. It is compared with Clypeina hanabataensis Yabe & Toyama 1949, a Late Jurassic species, and with Pseudoactinoporella fragilis (Conrad, 1970), an Early Cretaceous taxon. This species belongs to a short list of green algae found in the young South Atlantic oceanic corridor.

Keywords


Dasycladales; Polyphysaceae; Clypeina; cladosporate; Cretaceous; Albian; Cenomanian

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DOI: http://dx.doi.org/10.1344/GeologicaActa2014.12.3.5

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Geologica Acta (ISSN-1695-6133)
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