order
Order, ORDER or Orders may refer to:
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
* Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of ...
of Foraminifera, characterized by multilocular 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 oceanic
benthos
Benthos (), also known as benthon, is the community of organisms that live on, in, or near the bottom of a sea, river, lake, or stream, also known as the benthic zone.estuarine waters. They also include many important fossils, such as the nummulitids.
Taxonomy
The Rotaliida are now divided into the following superfamilies:Rotaliida World Foraminifera Database, accessed 27 November 2018
Image:Star sand from Okinawa, Japan - (1).jpg, '' Baculogypsina sphaerulata'' ( Calcarinidae)
Image:Miniacina miniacea 30-09-06 DSCF3288.jpg, '' Miniacina miniacea'' ( Homotrematidae)
Image:3579h R Indonesie.jpg, '' Heterostegina depressa'' ( Nummulitidae)
Image:Foraminifera - Rotaliida - Planorbulinacea - Planulinidae - Planulina Limbata.jpg, '' Planulina Limbata'' ( Planulinidae)
Image:Ammonia tepida.jpg, ''
Ammonia tepida
''Ammonia tepida'' is a benthic foraminifer living in the sediment of brackish waters. It is very similar to '' Ammonia beccarii'', but the latter lives on the surface of red algae. Once considered a globally widespread taxon, a recent genetic a ...