Desmothoracid

The Clathrulinidae are a family of heterotrophic protozoa ( protists ), which were systematically considered heliozoan long, but are now made ​​to the Cercozoa. Often the name Desmothoracida is used for the group.

Features

The Clathrulinidae are unicellular organisms. You are amoebae with stiff pseudopodia ( Axopodien ) and sit in a Lorica of organic material. Often these are stalked. The Axopodien extend through holes in the Lorica outside. This heliozoan stage produces biflagellate, motile cells from this stage of its development back to amoeboid forms with rigid but movable pseudopodia.

The mitochondria have tubular cristae. The microtubules that support the pseudopodia are not geometrically or loosely arranged hexagonally, there is no microtubule- organizing center. Dictyosomes are present in large numbers. As Extrusomen Kinetozysten occur with concentric core and belt.

System

The Clathrulinidae were long to heliozoan ( Heliozoa ) provided that there are no natural kinship group, however. Based on molecular genetic features of the Clathrulinidae will be provided to Cercozoa. Adl et al. provide it together with the Gymnosphaerida in the group Nucleohelea. Close relatives are Massisteria and Gymnophrys Along with these they are at the base of the core Cercozoa.

To the family of three genera are counted:

• Clathrulina
• Hedriocystis
• Cienkowskya

Adl et al. include additional Servetia incertae sedis as to the family.

Documents

• Sina M. Adl et al.: The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists. The Journal of Eukaryotic Microbiology, Volume 52, 2005, pp. 399-451 (Abstract and full text)
• David J. Patterson: The diversity of eukaryotes. The American Naturalist, Volume 65, Supplement, 1999, pp. 96-124.