Biostratigraphic and Geological Significance of Planktonic Foraminifera
Foraminifera are marine, free-living, amoeboid protozoa(in Greek, proto = first and zoa = animals). They aresingle-celled eukaryotes (organisms the cytoplasm ofwhich is organized into a complex structure with internalmembranes and contains a nucleus, mitochondria,chloroplasts, and Golgi bodies, see...
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UCL Press,
2015.
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| Summary: | Foraminifera are marine, free-living, amoeboid protozoa(in Greek, proto = first and zoa = animals). They aresingle-celled eukaryotes (organisms the cytoplasm ofwhich is organized into a complex structure with internalmembranes and contains a nucleus, mitochondria,chloroplasts, and Golgi bodies, see Fig. 1.1), and theyexhibit animal-like (cf. plant-like) behaviour. Usually,they secrete an elaborate, solid carbonate skeleton (ortest) that contains the bulk of the cell, but some formsaccrete and cement tests made of sedimentary particles.The foraminiferal test is divided into a series of chambers,which increase in number during growth. In life, theyexhibit extra-skeletal pseudopodia (temporary organicprojections) and web-like filaments that can be granular,branched and fused (rhizopodia), or pencil-shaped andpointed (filopodia). The pseudopodia emerge from thecell body (see Plate 1.1 below) and enable bidirectionalcytoplasmic flow that transports nutrients to the body ofthe cell (Baldauf, 2008). Foraminifera first appeared inthe Cambrian with a benthic mode of life and, over thecourse of the Phanerozoic, invaded most marginal to fullymarine environments. They diversified to exploit a widevariety of niches, including, from the Late Triassic orJurassic, the planktonic realm. These planktonic forms arethe focus of this book. Both living and fossil foraminifera come in a wide |
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| Item Description: | http://oer.library.unej.ac.id//index.php?p=show_detail&id=347 570 BOU b |