What makes phylum Heliozoa different from radiolaria?

They are similar to Radiolaria, but they are distinguished from them by lacking central capsules and other complex skeletal elements, although some produce simple scales and spines. They may be found in both freshwater and marine environments.

How many species of Heliozoans have been described?

A total of 23 species from 4 taxonomic groups have been found.

What group does Heliozoan belong to?

heliozoan, any member of the protozoan class Heliozoea (superclass Actinopoda). Heliozoans are spherical and predominantly freshwater and are found either floating or stalked.

Where can Actinosphaerium be found?

They are the most common heliozoa in fresh water, and are especially frequent in lakes and rivers, but a few are found in marine and soil habitats as well.

What is Actinosphaerium adaptation?

The Actinosphaerium has a food vacuole, which is a vacuole with a digestive function in the protoplasm of a protozoan. Also it has an axopod which is a group of thin pseudopods. Next it has an contractile vacuole, which is a vacuole in some protozoans that expels excess liquid on contraction.

Is Actinosphaerium prokaryotic or eukaryotic?

The Actinosphaerium is a protist (protozoan) and belongs to the Phyllum Sarcodina. It looks like a sea urchin and is from 200-1000 micrometers wide. This is quite large for a protist.

Is Actinosphaerium algae or protozoa?

The actinophryids are a small, familiar group of heliozoan protists. They are the most common heliozoa in fresh water, and are especially frequent in lakes and rivers, but a few are found in marine and soil habitats as well.

Is Actinosphaerium unicellular or multicellular?

It is a protist that uses its long axopodia to capture prey. Actinosphaeria are also known as sun animalcules and are approximately 0.2 – 1.0mm wide.