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Heliozoa | |
 | Catalogue / Nature / Vie / Protoctists (Protoctistae) / Single Celled Eukaryotes (Protista) / Heliozoa |
| Catalogue / Nature / Vie / Protoctists (Protoctistae) / Single Celled Eukaryotes (Protista) / Rhizopoda / Heliozoa |
| Catalogue / Nature / Vie / Protoctists (Protoctistae) / Single Celled Eukaryotes (Protista) / Actinopoda / Heliozoa |
 | Actinophryida [36] |
| Desmothoracida [10] |
| Taxopodida [1] |
| | Sticholonchidea [0] |
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Protozoa: Heliozoa. An introduction with photomicrographs.
The heliozoa are radially symmetrical unicells characterised by the possession of long, slender cytoplasmic arms called axopodia, stiffened by a complex structure of microtubules. Cytoplasm flows continuously back and forth along the axopodia, conveying bacteria and anything else which adheres to them back to the cell body. Larger prey such as algal cells may become enmeshed in the axopodia and similarly incorporated into the cell body. [eng] |
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Protist Images: Heliozoa unidentified species
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IMAGE GALLERY: HELIOZOA
Heliozoa exhibit a sphaerical cell-body containing one or more nuclei. Along the axopods, mitochondria, vesicles and other particles may be transported underneath the plasma membrane in a process called "granular streaming". Often, an apparently looser ectoplasm with pulsatile vacuoles can be distinguished from a denser endoplasm with nuclei. Mostly asexual propagation, sexual propagation known only from Actinophrys and Actinosphaerium. [eng] |
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Artstre: Heliozoa
Det er ennå ikke gjort noen registreringer av denne gruppa. [nor] |
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HELIOZOA definition
Order Heliozoida. A group of amoeboid protozoa. They are generally free floating, spherical cells with many straight, slender microtubule supported pseudopods radiating from the cell body like a sunburst. These modified pseudopods are termed axopodia. Genera include Actinophrys and Echinosphaerium. [eng] |
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Sonnentierchen, Heliozoa
Zur Ordnung der Heliozoa oder Sonnentierchen zählt das ca. 250 µm große Strahlenblättchen. Die zahlreichen Strahlen werden Axopodien genannt. Sie sind feine, offensichtlich giftige Plasmafortsätze, die durch eine gelartig verfestigte Plasmaachse verstärkt werden. Vorbeischwimmende Wimper- oder Rädertiere werden gelähmt oder vergiftet und anschließend von den Pseudopodien, das sind bewegliche, kontrahierfähige Scheinfüßchen, ins Innere gezogen und verdaut. [deu] |
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