SARCODINA

the largest phylum (11,500 living species and 33,000 fossil species) of protozoans). It comprises the amebas and related organisms; which are all solitary cells that move and capture food by means of pseudopods, flowing temporary extensions of the cell. Most sarcodines are free living; others are parasitic. One of these parasites is the causative organism of amebic dysentery. With the exception of chloroplasts, sarcodines are identical to the ameboid members of the phylum Chrysophyta. Sarcodines may reproduce asexually by cell division, often without breakdown of the nuclear envelope that is typical in mitosis, or sexually by meiosis and the production of haploid gametes, followed by fusion of gametes and the formation of zygotes.

The sarcodines include the naked forms (amebas) and forms with perforated shells, or tests, through which pseudopods may be extended. Best known of the shelled forms are the foraminiferans, with calcium carbonate shells.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Sarcodina
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books on: Sarcodina  - 25 results

       More book Results: 1-10 11-20 21-25 >>  
 
1.
Field Book of Seashore Life
Book by Roy Waldo Miner; Putnam, 1950
Subjects: Marine Animals
bling the Sarcodina in shape, which reproduce themselves before...deal with parasitic forms, only the Subphyla Sarcodina, Mastigophora, and Infusoria will be treated here. SUBPHYLUM SARCODINA This subphylum includes the rhizopods or...
2.
Evolution and Genetics: The Modern Theory of Evolution
Book by David J. Merrell, Olivia Jensen Ingersoll; Holt, Rinehart and Winston, 1962
Subjects: Evolution (Biology), Genetics
Sarcodina Rhizopoda -- amoeboid movement by means...relationship between the flagellates and the Sarcodina is also suggested by the Rhizomastigina...various groups of flagellates. That the Sarcodina are derived from the flagellates rather...
3.
Chambers's Technical Dictionary
Book by C. F. Tweney, L. E. C. Hughes; Macmillan, 1958
Subjects: Technology--Dictionaries
...intestine. Latin stercus , gen. stercoris , dung. stercomarium Zool. . In some Sarcodina, the system of stercome-containing tubes. stercome Zool. . In some Sarcodina , faecal matter in the form of masses of brown granules.
4.
Understanding Evolution
Book by Earl D. Hanson; Oxford University Press, 1981
Subjects: Evolution (Biology)
...cnidosporidian parasites with polar capsules Form-Superphylum Sarcodina, s.l., pseudopodial protozoans Phylum Caryoblastea or Pelobiontida, amitotic amoebae Phylum Rhizopoda or Sarcodina, s.s., naked and shelled amoebae Phylum Actinopoda...
5.
Paleolimnology: The History and Evolution of Lake Systems
Book by Andrew S. Cohen; Oxford University Press, 2003
Subjects: Paleolimnology
...metazoans of importance to paleolimnology. (A) Difflugia corona (Difflugiidae, Sarcodina testate amoeban). (B) Lesquereusia spiralis (Difflugiidae, Sarcodina testate amoeban). (C) Typical growth morphology for benthic, encrusting sponges...
More book Results: 1-10 11-20 21-25 >>

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encyclopedia articles on: Sarcodina  - 5 results

 
 
1.
Sarcodina
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
SARCODINA the largest phylum (11,500 living species and 33,000 fossil species) of protozoans ). It comprises the amebas and related...
2.
Foraminiferan
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...large, shelled ameboid protozoans belonging to the phylum Sarcodina. Most foraminiferan shells are calcareous, but some are...shaped skeletons. Foraminiferans are classified in the phylum Sarcodina , class Granuloreticulosa...
3.
Ameba
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...for certain one-celled organisms belonging to the phylum Sarcodina of the kingdom Protista . Amebas were previously classified...such as pseudopodia. Other ameboid protozoans of the phylum Sarcodina include the marine radiolarians, which form silicate skeletons...
4.
Protozoan
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...classified in the animal kingdom, they are now generally divided into five protist phyla: Mastigophora (the flagellates), Sarcodina (the amebas), Ciliophora (the ciliates), Opalinida , and Sporozoa . Most are motile, and most ingest food, as do animals...
5.
Silica
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...clay, granite, and many other rocks; in skeletal parts of various protists and animals, such as certain sarcodines (see Sarcodina ), diatoms , and sponges , and in the stems and other tissue of higher plants. Silica has many important uses. It is used...


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