Fusiform and laterally compressed alveolinaceans (Foraminiferida) from both sides of the Late Cretaceous Atlantic
Shallow, restricted carbonate facies in the Late Cretaceous yield on both sides of the Atlantic axially compressed, discoidal, and axially elongate, fusiform alveolinacean shells. Their structural analysis reveals that the taxa involved are dissimilar on both sides of the Atlantic. The structural differences warrant separate generic names for the alveolinacean associations on either side of the Atlantic. Two of them, Fabalveolina and Caribalveolina, are new. An important element of distinction is found in the endoskeleton: solid basal layers, that constitute the median zone of the discs and the columellas of the fusiform shells, may be pierced by tubular supplemental passages or the same shell elements may be constructed by septula and floors delimiting more regular stacks of chamberlets in supplemental layers. Fusiform alveolinaceans are restricted to two realms on the shores of the Atlantic, the Caribbean in the West and the Pyrenean Gulf in the East. Compressed alveolinaceans characterize the Caribbean on one hand, the Western Neotethys on the other. They seem to be absent from the Pyrenean Gulf, where they might be substituted by the Meandropsinidae. This emphasises the importance of the Pyrenean Gulf as separate faunal province.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: August 1, 2009
More about this publication?
- Neues Jahrbuch für Geologie und Paläontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Ingenta Connect is not responsible for the content or availability of external websites