A paleoecological and paleobiogeographic evaluation of Helicosphaera inversa (Gartner) Theodoridis and the diachrony of its first occurrence

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doi: 10.1016/j.marmicro.2013.08.001
Author(s): Maiorano, Patrizia; Tarantino, Francesca; Marino, Maria; Girone, Angela
Author Affiliation(s): Primary:
Universita degli Studi di Bari Aldo Moro, Dipartimento di Scienze della Terra e Geoambientali, Bari, Italy
Volume Title: Marine Micropaleontology
Source: Marine Micropaleontology, Vol.104, p.14-24. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-8398 CODEN: MAMIDH
Note: In English. 73 refs.; illus., incl. 1 plate, 1 table, sketch maps
Summary: The distribution pattern of Helicosphaera inversa (Gartner) Theodoridis is examined from a mid-latitude North Atlantic core (MD01-2446) and two Mediterranean cores (Ocean Drilling Program-ODP Site 975 and Core KC01B) through Marine Isotope Stage (MIS) 13 to 9. The earliest rare occurrences are observed from the uppermost part of MIS 12, while common and continuous abundances characterize MIS 11. The paleoenvironmental framework of the study cores suggests that the taxon thrived in warm surface waters. Correlation with new data from planktonic foraminifera also suggests that H. inversa may have only flourished within a limited salinity range. Comparison with previous findings highlights major diachrony in the FO of the taxon between low and mid-latitude records. It first occurred at lower latitude in the Pacific as early as 0.8 Ma, while in the mid-latitude North Atlantic regions, it is not recorded before 0.51 Ma. The distribution of the taxon in the North Atlantic Ocean also apparently varies in relation with surface water masses and hydrographic fronts. The results suggest that the FO of H. inversa is ecologically controlled and needs to be used with caution in worldwide stratigraphic correlation. Nevertheless, the distribution of the species within the Mediterranean Basin can produce an invaluable ecostratigraphical signal. Abstract Copyright (2013) Elsevier, B.V.
Year of Publication: 2013
Research Program: ODP Ocean Drilling Program
Key Words: 09 Paleontology, Paleobotany; 24 Surficial Geology, Quaternary Geology; Algae; Atlantic Ocean; Biogeography; Biostratigraphy; Cenozoic; Cores; First occurrence; Helicosphaera inversa; Leg 161; Marine environment; Marine sediments; Mediterranean Sea; Microfossils; Minorca Rise; Morphology; Nannofossils; North Atlantic; ODP Site 975; Ocean Drilling Program; Paleoecology; Paleoenvironment; Plantae; Pleistocene; Quantitative analysis; Quaternary; Sediments; West Mediterranean
Coordinates: N385348 N385348 E0043036 E0043036
N390300 N390300 W0123800 W0123800
N361500 N361500 E0174500 E0174500
Record ID: 2013098147
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands