Cretaceous foraminifera and the evolutionary history of planktic photosymbiosis
Document Type
Article
Date of Original Version
1-1-1998
Abstract
Ecotypic correlations between stable isotopic signals and skeletal size indicate that some Late Cretaceous serial planktic foraminifera were strongly photosymbiotic. In contrast, coeval trochospiral planktic foraminifera do not exhibit the isotope/size signatures that typify strongly photosymbiotic species. Comparison to Cenozoic taxa demonstrates that photosymbiosis has recurred throughout planktic foraminiferal history and has evolved independently in superfamilies characterized by very different gross skeletal morphologies. The historical contingency of that evolution is illustrated by the consequences of the Cretaceous/Paleogene mass extinction, which terminated the Cretaceous lineages of photosymbiotic planktic foraminifera but did not permanently extinguish photosymbiont reliance by planktic foraminifera.
Publication Title, e.g., Journal
Paleobiology
Volume
24
Issue
4
Citation/Publisher Attribution
D'Hondt, Steven, and James C. Zachos. "Cretaceous foraminifera and the evolutionary history of planktic photosymbiosis." Paleobiology 24, 4 (1998). https://digitalcommons.uri.edu/gsofacpubs/1178