(Table 1) First and last occurrences of the menardellid clade in sediments of ODP Site 154-925

DOI

Biostratigraphic and isotopic studies of planktic foraminifera suggest that early to middle Pliocene closure of the Central American Seaway caused vicariant speciation among previously cosmopolitan menardellid foraminifera. New morphospecies were restricted to the tropical Atlantic. Isotopic data suggest that newly evolved Atlantic menardellids were adapted to more oligotrophic conditions, living higher in the water column than ancestral forms and perhaps harboring photosymbionts. In the late Pliocene, all but one menardellid morphospecies became extinct. These extinctions coincided with a progressive increase in the amplitude of periodic climatic change and the end of isolated tropical Atlantic surface circulation as Northern Hemisphere glaciation intensified.

Identifier
DOI https://doi.org/10.1594/PANGAEA.712436
Related Identifier https://doi.org/10.1130/G19834.1
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.712436
Provenance
Creator Chaisson, William P
Publisher PANGAEA
Publication Year 2003
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 11 data points
Discipline Earth System Research
Spatial Coverage (-43.489 LON, 4.204 LAT); South Atlantic Ocean
Temporal Coverage Begin 1994-02-08T00:00:00Z
Temporal Coverage End 1994-02-14T00:00:00Z