What question did this study set out to answer?

To reconstruct the spatial distribution, ecological preferences, and extinction history of Neogloboquadrina atlantica morphotypes across the North Atlantic from the Late Miocene to the Early Pleistocene.

August 1, 2026Paleoceanography and Paleoclimatology

The Rise and Fall of Neogloboquadrina atlantica : Distribution and Extinction in the North Atlantic

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Authors

MDMónica Duque-Castaño MRMaureen E. Raymo KBKatharina Billups

Discussion

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Overview

Stratigraphic analysis reveals distinct extinction timelines for Neogloboquadrina atlantica morphotypes across the North Atlantic, indicating climate-driven habitat reorganization.

Key Points

To reconstruct the spatial distribution, ecological preferences, and extinction history of Neogloboquadrina atlantica morphotypes across the North Atlantic from the Late Miocene to the Early Pleistocene.
Synthesized published stratigraphic records with new fossil abundance counts across subpolar, transitional, and subtropical North Atlantic sites.
Generated stable isotope measurements and updated age constraints to track environmental conditions and population trends over time.
Neogloboquadrina atlantica expanded diachronously after its Late Miocene appearance, with the sinistral morphotype dominating throughout the Pliocene while the dextral form became rare.
The sinistral morphotype experienced regional diachronous extinction near 2.4 Ma, whereas the dextral morphotype disappeared via a north-to-south progression, vanishing from subpolar regions first and persisting until approximately 1.3 Ma in the northern subtropical gyre.
Morphotype decline coincided with Northern Hemisphere cooling, intensified glacial-interglacial climate cycles, and recurring ice-rafting episodes.

Cite This Study

Duque-Castaño et al. (2026) studied this question.

synapsesocial.com/papers/6aa2ca7bd081bdd435a7314d https://doi.org/10.1029/2026pa005550

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August 1, 2026Paleoceanography and Paleoclimatology

The Rise and Fall of Neogloboquadrina atlantica : Distribution and Extinction in the North Atlantic

View Full Paper

Ask AI

Bookmark

Authors

MDMónica Duque-Castaño MRMaureen E. Raymo KBKatharina Billups

Discussion

Member takes

Overview

Stratigraphic analysis reveals distinct extinction timelines for Neogloboquadrina atlantica morphotypes across the North Atlantic, indicating climate-driven habitat reorganization.

Key Points

To reconstruct the spatial distribution, ecological preferences, and extinction history of Neogloboquadrina atlantica morphotypes across the North Atlantic from the Late Miocene to the Early Pleistocene.
Synthesized published stratigraphic records with new fossil abundance counts across subpolar, transitional, and subtropical North Atlantic sites.
Generated stable isotope measurements and updated age constraints to track environmental conditions and population trends over time.
Neogloboquadrina atlantica expanded diachronously after its Late Miocene appearance, with the sinistral morphotype dominating throughout the Pliocene while the dextral form became rare.
The sinistral morphotype experienced regional diachronous extinction near 2.4 Ma, whereas the dextral morphotype disappeared via a north-to-south progression, vanishing from subpolar regions first and persisting until approximately 1.3 Ma in the northern subtropical gyre.
Morphotype decline coincided with Northern Hemisphere cooling, intensified glacial-interglacial climate cycles, and recurring ice-rafting episodes.

Cite This Study

Duque-Castaño et al. (2026) studied this question.

synapsesocial.com/papers/6aa2ca7bd081bdd435a7314d https://doi.org/10.1029/2026pa005550

View Full Paper

Ask AI

Bookmark