Related Experiment Video
Updated: Nov 1, 2025
14:06
Rapid Testing of Resistance of Timber to Biodegradation by Marine Wood-Boring Crustaceans
Published on: January 29, 2022
4.0K
Test structure in some pioneer multichambered Paleozoic foraminifera
Zofia Dubicka1,2, Maria Gajewska3, Wojciech Kozłowski1
1Faculty of Geology, University of Warsaw, PL 02-089 Warsaw, Poland.
Summary
Paleozoic foraminifera classification needs revision. New analysis of Devonian foraminifera reveals distinct wall microstructures, challenging the traditional "Fusulinata" classification and suggesting multiple high-rank taxonomic groups.
Area of Science:
- Paleontology
- Micropaleontology
- Evolutionary Biology
Background:
- Foraminiferal wall microstructures are key to understanding their evolution and taxonomy.
- Paleozoic foraminiferal test structures are poorly understood, with most assigned to Fusulinata based on 'microgranular' walls.
Purpose of the Study:
- To investigate the test wall microstructures of Devonian foraminifera, specifically *Semitextularia thomasi*.
- To compare these structures with Permian 'true' fusulinids to reassess Paleozoic foraminiferal classification.
Main Methods:
- Microstructural analysis of exceptionally preserved Devonian *Semitextularia thomasi* tests.
- Comparative analysis with a Permian representative of Neoschwagerinidae.
Main Results:
- *Semitextularia thomasi* exhibits unique lamellar wall structures, unlike any other foraminiferal group.
- Paleozoic calcareous foraminifera possess at least three distinct wall microstructures, indicating separate high-rank taxonomic groups.
Conclusions:
- The traditional classification of Paleozoic calcareous foraminifera into a single taxon (Fusulinata) is likely polyphyletic and requires revision.
- The term Fusulinata should be restricted to true complex fusulinids with microgranular structures or abandoned.
