Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
3,900,842,395 visitors served.
forum Join the Word of the Day Mailing List For webmasters
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

Heliozoa

   Also found in: Dictionary/thesaurus, Wikipedia 0.02 sec.
Heliozoa 

a subclass of protozoans of the class Sarcodina. The body is usually globose and has raylike appendages (pseudopodia) with dense protoplasmic axial filaments. Heliozoans include naked forms and forms having an external siliceous skeleton. There may be one or more nuclei. The majority of heliozoans are freshwater or marine planktonic organisms; some attach themselves to a substrate by means of a stalk. The protozoans feed on algae, protozoans, and rotifers; several individuals may combine to overcome larger prey. Heliozoans have contractile vacuoles. Reproduction is usually by binary fission. A sexual process has been observed in some species; the gametes resemble small adult individuals.
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link 		Feedback
Mentioned in?  References in periodicals archive?   Encyclopedia browser?   Full browser?
No references found
 
Six taxa of siliceous scale-bearing heliozoa belonging to the genera Acanthocystis, Pinaciophora, Pterocystis, Raphidocystis and Raphidiophrys were observed from various northern Indiana freshwater sites.
Freshwater heliozoa (protista, heliozoa) from Indiana by Wujek, Daniel E. / Proceedings of the Indiana Academy of Science
Petersen and Hansen (1960) were the first to describe new species of heliozoa based on electron microscopy of scales.
Freshwater scaled heterotrophic protistans from four Gulf States, ... by Wujek, Daniel E. / Journal of the Alabama Academy of Science
 
 
 
Encyclopedia
?

Terms of Use | Privacy policy | Feedback | Advertise with Us | Copyright © 2012 Farlex, Inc.
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.