Heliomonadida
Order of single-celled organisms
From Wikipedia, the free encyclopedia
The Heliomonadida[1] (formerly Dimorphida[2]) are a small group of heliozoan amoeboids that are unusual in possessing flagella throughout their life cycle.
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| Heliomonadida | |
|---|---|
| |
| Heliomorpha mutans (= Dimorpha mutans), fig. 9-11 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Clade: | Sar |
| Clade: | Rhizaria |
| Phylum: | Cercozoa |
| Class: | Granofilosea |
| Order: | Heliomonadida Cavalier-Smith, 1993 emend. Cavalier-Smith, 2012 |
| Family: | Heliomorphidae Cavalier-Smith & Bass 2009 |
| Genera | |
| |
Classification
Genetic studies place them among the Cercozoa, a group including various other flagellates that form filose pseudopodia. This order has recently been placed into the new class of naked filose cercozoans called Granofilosea.[1] There are two genera in this order:
- Heliomorpha, a tiny organism found in freshwater
- the larger Tetradimorpha, which is distinguished by having four rather than two flagella.
Morphology
Bundles of microtubules, typically in square array, arise from a body near the flagellar bases and support the numerous axopods that project from the cell surface.
Dimorphids have a single nucleus, and mitochondria with tubular cristae.
