Cryomonadida

The Cryomonadida are a group of heterotrophic protists belonging to the Cercozoa.

Features

The Cryomonadida are unicellular organisms that are surrounded by a multilayered shell of organic material. They have two flagella of unequal length and a single nucleus with conspicuous nucleolus. The transition zone of the hostages has a helix; axial rods in the flagella are missing. They have a side -seated cell mouth ( cytostome ), are formed by the starting and the pseudopodia. Their mitochondria have tubular cristae. The representatives have long Extrusomen.

System

The order Cryomonadida was built in 1993 for the genus Cryothecomonas. Adl et al. led the organization in its scheme 2005 does not, but questioned the genus incertae sedis as to the Cercozoa. It was found, however, that except Cryothecomonas other genres as well as previously undescribed DNA environmental samples belong to this group. Therefore, the Cryomonadida of Pawlowski be out in 2008 as one of the groups of the core Cercozoa.

To order the following genera are counted:

• Cryothecomonas
• Protaspis grandis
• Lecythium

Documents

• Thomas Cavalier- Smith: The Protozoan Phylum Opalozoa. Journal of Eukarytic Microbiology, Volume 40, 1993, pp. 609-615.
• Mona Hoppe Rath, Brian S. Leander: Ebriid Phylogeny and the expansion of the Cercozoa. Protist, Volume 157, 2006, pp. 279-290, doi: 10.1016/j.protis.2006.03.002