Lackey, James B. Department of Environmental Engineering, University of Florida, Gainesville, Florida.
- Additional Reading
A class of protozoa of the subphylum Sarcomastigophora. Members of the class Zoomastigophorea, also known as Zoomastigina, are flagellates that have few or no characters relating them to the pigmented forms. Some are simple, whereas some are specialized; some have pseudopodia in addition to flagella, while others have no pseudopodia. One group engulfs solid food at any body point; another shows localized ingestive areas. All are colorless. They do not produce starch or paramylum, and lipids and glycogen are assimilation products. Cells are naked or have delicate membranes. Colony formation is common. Colonies differ greatly in form and may be amorphous, linear, spherical, arboroid, or planar. Flagella vary from none to many. Nuclei generally have endosomes; frequently, a rhizostyle extends from the nucleus to the flagellum base. Nutrition is holozoic, saprozoic, or parasitic, and encystment is common. Ecologically, zoomastigophoreans are adapted to waters of relatively high organic content, but they occur in the clearest freshwaters and in the high seas. Nine orders are included in this class: Bicosoecida, Choanoflagellida, Diplomonadida, Hypermastigida, Kinetoplastida, Oxymonadida, Retortamonadida, Rhizomastigida, and Trichomonadida. See also: Bicosoecida; Choanoflagellida; Diplomonadida; Hypermastigida; Kinetoplastida; Oxymonadida; Protozoa; Retortamonadida; Sarcomastigophora
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 45 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information