order
Order, ORDER or Orders may refer to:
* A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
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of
Foraminifera
Foraminifera ( ; Latin for "hole bearers"; informally called "forams") are unicellular organism, single-celled organisms, members of a phylum or class (biology), class of Rhizarian protists characterized by streaming granular Ectoplasm (cell bio ...
, 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
Nummulitidae is a family of foraminifera in the order Rotaliida. It was described in 1827 by Henri Marie Ducrotay de Blainville.
Genera
* ''Assilina'' d'Orbigny, 1839
* ''Cycloclypeus'' W.B. Carpenter, 1856
* ''Heterocyclina'' Hottinger, 1977 ...