georefid:2009-048581SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2113/gsjfr.39.2.1122009-01-01publicationgeorefid:2009-048581doi:10.2113/gsjfr.39.2.112Spezzaferri, SilviaUniversity of Fribourg, Department of Geosciences, Fribourg, SwitzerlandauthorPearson, Paul N.Cardiff University, United KingdomauthorCushman Foundation for Foraminiferal Research, Ithaca, NY, United StatespublisherdocumentHardcopyJournal of Foraminiferal Research39 (2)112-119The Oligocene-Miocene transition is characterized by a low degree of biotic turnover (extinction plus origination) in many microfossil groups and especially in planktonic foraminifera. Few species appear, evolve, and disappear across this boundary, and the existence of transitional forms between key species makes biostratigraphic resolution of the boundary interval difficult. The boundary is officially located in the type section using magnetostratigraphic criteria, and the first occurrence (FO) of the planktonic foraminifer Paragloborotalia kugleri is the closest bioevent to the boundary. The identification of supplementary bioevents is therefore important to refine the biostratigraphic resolution of this interval. We describe here a new species of planktonic foraminifer, Catapsydrax indianus, the range of which improves the biostratigraphic resolution across this problematic boundary. In particular, the distribution of this species spans an interval of approximately 5 million years across the Oligocene-Miocene transition from just above the FO of Paragloborotalia pseudokugleri (25.9 Ma) in the late Oligocene Biochron P22 (= Biochron O6) to the FO of Globigerinoides altiaperturus (20.5 Ma) in the early Miocene. The habitat of this new species is inferred from its oxygen and carbon isotope values by comparison with the other species in a multispecies isotope cross-plot. Our data show that the deepest-dwelling of all the planktonic foraminifera was the genus Catapsydrax, which has relatively positive delta (super 18) O and negative delta (super 13) C values. Catapsydrax indianus has isotopic ratios similar to those of the other species in the genus, suggesting a similar habitat.completedStratigraphyInvertebrate paleontologyAtlantic OceanbiostratigraphyC-13/C-12Cape BasincarbonCaribbean SeaCatapsydrax indianusCenozoicDeep Sea Drilling ProjectDSDP Site 151DSDP Site 17DSDP Site 360DSDP Site 363DSDP Site 516DSDP Site 526DSDP Site 588Equatorial AtlanticForaminiferahabitatindex fossilsIndian OceanInvertebrataIPODisotope ratiosisotopesLeg 108Leg 115Leg 15Leg 3Leg 40Leg 72Leg 74Leg 90Lord Howe Riselower MiocenemicrofossilsMid-Atlantic RidgeMiocenemorphologyNeogenenew taxaNorth AtlanticO-18/O-16Ocean Drilling ProgramODP Site 667ODP Site 709ODP Site 714OligoceneoxygenPacific OceanpaleoecologyPaleogeneplanktonic taxaProtistaRio Grande RiseSierra Leone RiseSouth AtlanticSouth PacificSouthwest Pacificstable isotopesstratigraphic boundarytaxonomyTertiaryupper OligoceneWalvis RidgeWest Pacificurn:org.iodp:exp:108urnlargerWorkCitationcampaignurn:org.iodp:exp:115urnlargerWorkCitationcampaignurn:org.iodp:exp:15urnlargerWorkCitationcampaignurn:org.iodp:exp:3urnlargerWorkCitationcampaignurn:org.iodp:exp:40urnlargerWorkCitationcampaignurn:org.iodp:exp:72urnlargerWorkCitationcampaignurn:org.iodp:exp:74urnlargerWorkCitationcampaignurn:org.iodp:exp:90urnlargerWorkCitationcampaignurn:org.iodp:exp:15:site:151urnlargerWorkCitationstudyurn:org.iodp:exp:15urnlargerWorkCitationcampaignurn:org.iodp:exp:3:site:17urnlargerWorkCitationstudyurn:org.iodp:exp:3urnlargerWorkCitationcampaignurn:org.iodp:exp:40:site:360urnlargerWorkCitationstudyurn:org.iodp:exp:40urnlargerWorkCitationcampaignurn:org.iodp:exp:40:site:363urnlargerWorkCitationstudyurn:org.iodp:exp:40urnlargerWorkCitationcampaignurn:org.iodp:exp:72:site:516urnlargerWorkCitationstudyurn:org.iodp:exp:72urnlargerWorkCitationcampaignurn:org.iodp:exp:74:site:526urnlargerWorkCitationstudyurn:org.iodp:exp:74urnlargerWorkCitationcampaignurn:org.iodp:exp:90:site:588urnlargerWorkCitationstudyurn:org.iodp:exp:90urnlargerWorkCitationcampaignurn:org.iodp:exp:108:site:667urnlargerWorkCitationstudyurn:org.iodp:exp:108urnlargerWorkCitationcampaignurn:org.iodp:exp:115:site:709urnlargerWorkCitationstudyurn:org.iodp:exp:115urnlargerWorkCitationcampaignurn:org.iodp:exp:115:site:714urnlargerWorkCitationstudyurn:org.iodp:exp:115urnlargerWorkCitationcampaignEnglishgeoscientificInformation-73.2435-6.3609-30.163615.0101Includes appendix