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doi:10.2204/iodp.proc.303306.213.2009

Results

Site U1314 yielded a numerous and taxonomically diverse mixture of ostracode species that included the typical deep-sea North Atlantic taxa, as well as subarctic and some Arctic upper slope and shelf species. We recognized more than 75 species belonging to ~40 genera (Table T1). Krithe, Cytheropteron, and Argilloecia are the most taxonomically diverse genera. These are also the most diverse and copious deep-sea genera in upper Pleistocene sediments on the Rockall Plateau (Didié and Bauch, 2000) and at other North Atlantic sites (Dingle and Lord, 1990; Van Harten, 1990; Coles et al., 1994; Cronin et al., 1999). The most abundant genera are Krithe (38%–87%), Rockallia (0%–33%), Pennyella (0%–30%), Pelecocythere (0%–32%), Cytheropteron (0%–20%), Henryhowella (0%–24%), Argilloecia (0%–23%), Legitimocythere (0%–15%), Pseudobosquetina (0%–14.5%), Ambocythere (0%–13%), Echinocythereis (0%–9%), and Bradleya (0%–12%). Other genera, such as Bythocythere (0%–17%), Bathycythere (0%–9%), Eucythere (0%–7%), Polycope (0%–9%), Propontocypris (0%–6%), Xestoleberis (0%–15%), Pontocypris (0%–11%) and Paracytherois (0%–9%) only arise during discrete intervals in our sedimentary record. All these genera have worldwide distribution and are common in deep-sea Cenozoic sediments (Dingle and Lord, 1990). Arctic shelf species occur in very low numbers in samples with high IRD and include Cluthia cluthae, Elofsonella concinna, Finmarchinella finmarchica, and Heterocyprideis sorbyana (Alvarez Zarikian et al., 2009).

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