(Table 1) Test sizes of Morozovelloides crassatus from ODP Site 171-1052

DOI

We propose a phenomenon termed “pre-extinction dwarfing” in Cenozoic planktonic foraminifera. High-resolution morphometric analysis shows a reduction in maximum or mean test size in the 2-20 kyr interval preceding the extinction of Pliocene Globorotalia exilis and Globorotalia miocenica from the Caribbean Sea and middle Eocene Morozovelloides crassatus from the western North Atlantic. Through a series of case studies and review of qualitative observations from the literature, we suggest that dwarfing occurs in a number of species of planktonic foraminifera foreshadowing their demise and that such size changes are not just a phenomenon associated with mass extinction events. We propose that this is a common stress-induced pattern that results in diminutive size in the pre-extinction interval.

Sediment depth is given in mcd. Size data are for the >300 µm fraction.

Supplement to: Wade, Bridget S; Olsson, Richard K (2009): Investigation of pre-extinction dwarfing in Cenozoic planktonic foraminifera. Palaeogeography, Palaeoclimatology, Palaeoecology, 284(1-2), 39-46

Identifier
DOI https://doi.org/10.1594/PANGAEA.777716
Related Identifier https://doi.org/10.1016/j.palaeo.2009.08.026
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.777716
Provenance
Creator Wade, Bridget S ORCID logo; Olsson, Richard K
Publisher PANGAEA
Publication Year 2009
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 360 data points
Discipline Earth System Research
Spatial Coverage (-76.627 LON, 29.951 LAT); Blake Nose, North Atlantic Ocean
Temporal Coverage Begin 1997-01-31T12:00:00Z
Temporal Coverage End 1997-02-06T04:30:00Z