| Rotaliida | |
|---|---|
 | |
| Ammonia beccarii (Rotaliidae) | |
Scientific classification | |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Rhizaria |
| Phylum: | Retaria |
| Subphylum: | Foraminifera |
| Class: | Globothalamea |
| Order: | Rotaliida Delage & Hérouard, 1896 |
| Suborders and superfamilies | |
See text | |
TheRotaliida are anorder ofForaminifera, characterized bymultilocular tests (shells) composed of bilamellar perforate hyaline lamellar calcite that may be optically radial or granular.
In form, rotaliid tests are typically enrolled, but may be reduced to biserial or uniserial, or may be encrusting with proliferated chambers. Chambers may be simple or subdivided by secondary partitions; the surface is smooth, papillate, costate, striate, or cancellate; the aperture is simple or with an internal toothplate, entosolenian tube, or hemicylindrical structure; it may have an internal canal or stolen systems.
Rotaliids are primarily oceanicbenthos, although some are common in shallowerestuarine waters. They also include many important fossils, such as thenummulitids.
The Rotaliida are now divided into the following superfamilies:[2]
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