Morphometric study of porosity and morphology of fossil Globigerinoides, during the Late Oligocene and Early Pliocene. Implications for the construction of a climatic and environmental paleoproxy ...

• Main Author: Constandache, Monica
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: Deep Sea Drilling Project DSDP; Ocean Drilling Program ODP; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.890078; https://doi.pangaea.de/10.1594/PANGAEA.890078

Globigerinoides is a group of planktonic foraminifera who appeared in the world's oceans around the Late Oligocene and are still largely present in the equatorial, tropical and subtropical regions of the modern Ocean. Several proposals of phylogeny have been presented since their discovery by d'Orbigny (1839), without reaching a consensus. Recent molecular studies have revealed an unexpectedly great and sometimes cryptic complexity, which further complicates the relationships between species of this genus. As a complementary contribution to this problem, the present study attempts a morphometric approach on fossil species from Late Oligocene and Early Pliocene. The study focuses on an analysis of (1) the porosity of the test and (2) the general morphology of fossil specimens. The porosity of the test appears to be mostly determined by the temperature of the sea-surface (SST) as related to latitude, but also by productivity. Especially in the vicinity of the equator porosity of the test is found to be an ... : Supplement to: Constandache, Monica (2017): Morphometric study of porosity and morphology of fossil Globigerinoides, during the Late Oligocene and Early Pliocene. Implications for the construction of a climatic and environmental paleoproxy. University of Fribourg, Switzerland, 163 pp ...