An extensive order of rhizopods which generally have a chambered calcareous shell formed by several united zooids. Many of them have perforated walls, whence the name. Some species are covered with sand. See Rhizophoda.
Protozoan group, individuals of which usually secrete a calcareous test; both planktonic and benthic representatives.
a group of single-celled animals (Protozoa) which form shells of lime. Some are microscopic, but some form shells over ten millimetres across.
Foraminifera are a type of protozoa, mostly marine, with a shell of lime, silica or agglutinated sand grains. Their shells form an important part of chalk, and of many deep-sea oozes. Fossil foraminiferans are usually less than 1 mm across, although some were up to 100 mm in diameter.
Microscopic plankton with calcitic shells, components of some limestones.
single-celled planktonic or benthic organisms with an external skeleton made of calcium carbonate
planktonic and benthic protozoa that have a test, or shell, composed of calcium carbonate.
single-celled marine animals (protozoa) which usually secrete a carbonate shell.
An order of single celled protozoans.
Protozoans with a wide variety of test ('skeleton') compositions and morphologies. They range in age from the Cambrian to the Recent, and are highly abundant in sediments. They are an important fossil for the study of biostratigraphy and paleoenvironmental reconstruction.
Single-celled protists that secrete a shell or test. Accumulations of the shells of dead foraminifera and other microscopic sea creatures form chalk deposits. PICTURE 1 | PICTURE 2
small, one-celled, mostly marine animals which secrete shells of calcium carbonate or build them of cemented sand grains. They range in size from microscopic to a few centimeters across. They occur in such quantities that their fossil shells make up almost all of certain limestone rocks in Florida and other places in the world.
A class of animals of very low organisation, and generally of small size, having a jelly-like body, from the surface of which delicate filaments can be given off and retracted for the prehension of external objects, and having a calcareous or sandy shell, usually divided into chambers, and perforated with small apertures. 73
skeletons of shelled protozoa, also called forams
Protozoan group (usually) secreting a calcareous shell; both planktonic and benthic representatives exist.
Protozoan group which are abundant in the plankton and benthos of all oceans and possess a protective test (shell) usually composed of calcium carbonate.
Invertebrate organisms that passes a calcium carbonate shell that is useful in dating or rocks
An order of Sarcodina, the members of which have numerous fine anastomosing pseudopodia and a shell which is calcareous; the shells of these organisms, when deposited in ocean sediments, are the source of climatic information about ancient temperatures.
The Foraminifera, or forams for short, are a large group of amoeboid protists with reticulating pseudopods, fine strands of cytoplasm that branch and merge to form a dynamic net. They typically produce a shell, or test, which can have either one or multiple chambers, some becoming quite elaborate in structure. . About 275,000 species are recognized, both living and fossil.
