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A NEW PLANKTONIC FORAMINIFER (FAMILY HEDBERGELLIDAE LOEBLICH AND TAPPAN, 1961) FROM THE LOWER CAMPANIAN SEDIMENTS OF THE FALKLAND PLATEAU, SOUTH ATLANTIC OCEAN (DSDP SITE 511)

Department of Geoscience, University of Calgary, 2500 University Drive N. W., Calgary, Alberta T2N 1N4, Canada e-mail: dgeorge{at}ucalgary.ca

Liuella falklandica nov. gen., nov. sp. is a planktonic foraminifer of the Late Cretaceous (lower Campanian) that is characterized by the following combination of features: imperforate peripheral band throughout the final whorl, smooth chamber surface and finely perforate to macroperforate test wall with crater-like perforations on the earlier chambers of the test. It is included in the Subfamily Hedbergellinae due to its strong resemblance in gross test architecture to Hedbergella planispira (Tappan) of the late Albian-Santonian, presumably its ancestor. The genus is monospecific.