Patterson, David J. Department of Zoology, University of Bristol, Bristol, United Kingdom.
Last reviewed:December 2019
- Additional Reading
An order of Heliozoia. These ameboid organisms live in a stalked perforated organic or inorganic lorica. Stiffened pseudopodia extend from the perforations to capture food which collides with them. The best-known species is Clathrulina elegans, found in freshwater environments (see illustration). This species has a spherical organic test. Unlike most Heliozoia, it has a life cycle which involves motile flagellated cells which arise from the sessile form and then may settle, transforming into amebas with thin pseudopodia. These ameboid forms secrete the stalk and lorica to give rise to the typical sessile (trophic) organism. Under unfavorable conditions, the organism encysts within the lorica. See also: Heliozoia; Protozoa; Sarcodina
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 46 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