Malvinia escutiana, a new biostratigraphically important Oligocene dinoflagellate cyst from the Southern Ocean

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doi: 10.1016/j.revpalbo.2011.03.002
Author(s): Houben, Alexander J. P.; Bijl, Peter K.; Guerstein, G. Raquel; Sluijs, Appy; Brinkhuis, Henk
Author Affiliation(s): Primary:
Utrecht University, Biomarine Sciences, Institute of Environmental Biology, Laboratory of Palaeobotany and Palynology, Utrecht, Netherlands
Other:
Universidad Nacional del Sur, Argentina
Volume Title: Review of Palaeobotany and Palynology
Source: Review of Palaeobotany and Palynology, 165(3-4), p.175-182. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0034-6667 CODEN: RPPYAX
Note: In English. 60 refs.; illus., incl. 2 plates
Summary: The Eocene-Oligocene Transition (EOT, ∼34 Ma) represents the culmination of Eocene cooling by the initiation of large-scale Antarctic glaciation. Recognition and correlation of the EOT in Southern Ocean sedimentary successions have been difficult as a result of the general lack of well-calibrated biostratigraphic markers. Here we describe an unusual hypnozygotic organic walled dinoflagellate cyst (dinocyst) that originated in the Southern Ocean in conjunction with the onset of major Antarctic glaciation as reflected by 'oxygen isotope event 1' (Oi-1). We restudied samples from Deep Sea Drilling Program (DSDP) Site 511 using Light Microscopy and Scanning Electron Microscopy and found that a taxon previously known as Forma T constitutes a new protoperidinioid dinocyst genus and species that we name Malvinia escutiana. Published and re-evaluated data from other Southern Ocean sites show that M. escutiana did not occur before the Oi-1 (33.7 Ma), emphasizing its potential as a useful biostratigraphic marker for this key interval in the Southern Ocean's Cenozoic climate history. Abstract Copyright (2011) Elsevier, B.V.
Year of Publication: 2011
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 09 Paleontology, Paleobotany; 12 Stratigraphy, Historical Geology and Paleoecology; Antarctica; Atlantic Ocean; Biogeography; Cenozoic; DSDP Site 511; Deep Sea Drilling Project; Dinoflagellata; Eocene; First occurrence; Glacial environment; IPOD; Index fossils; Leg 71; Malvinia escutiana; Microfossils; Morphology; New taxa; Oligocene; Paleoclimatology; Paleoenvironment; Paleogene; Palynomorphs; Range; SEM data; South Atlantic; Southern Ocean; Taxonomy; Tertiary
Coordinates: S510017 S510017 W0465818 W0465818
Record ID: 2013096445
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands