Commation cryoporinum is a species of heterotrophic protists discovered in 1993 in Antarctic waters.[1] It is one of two species in the Commatiida, an order of stramenopiles closely related to actinophryids, a group of heliozoan protists,[2] and to raphidophytes, a group of algae.[3]
| Commation cryoporinum | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Gyrista |
| Subphylum: | Ochrophytina |
| Class: | Raphidomonadea |
| Order: | Commatiida |
| Family: | Commatiidae |
| Genus: | Commation |
| Species: | C. cryoporinum
|
| Binomial name | |
| Commation cryoporinum Thomsen & Larsen, 1993[1]
| |
Etymology
editThe name of the species derives from Greek cryos 'ice' and oporinos 'autumnal', a reference to the Herbst im Eis (meaning "Autumn in Ice") expedition which allowed the collection of this species. The name of the genus derives from Latin comma, which references the general biconvex shape of the cell.[1]
Morphology
editCommation cryoporinum is a species of unicellular eukaryotes composed of oval cells measuring 7–14 × 5–8 μm. They present a conspicuous proboscis measuring 9–14 μm in length and 2–4 μm in diameter at the base, relatively short and thick in comparison to the longer and thinner proboscis of Commation eposianum. Their complex cytoskeleton is dominated by microtubular components, not conspicuous under light microscopy. Two kinds of extrusomes can occur in both the cell body and the proboscis; the largest ones are visible under light microscopy, appearing as small refractile bodies. In contrast, C. eposianum only presents one type of extrusomes which is never visible under light microscopy.[1]
References
edit- ^ a b c d Helge Abildhauge Thomsen; Jacob Larsen (12 November 1993). "The ultrastructure of Commation gen. nov. (Stramenopiles incertae sedis), a genus of heterotrophic nanoplanktonic flagellates from antarctic waters". European Journal of Protistology. 29 (4): 462–477. doi:10.1016/S0932-4739(11)80409-8.
- ^ Cavalier-Smith, Thomas; Scoble, Josephine Margaret (2013). "Phylogeny of Heterokonta: Incisomonas marina, a uniciliate gliding opalozoan related to Solenicola (Nanomonadea), and evidence that Actinophryida evolved from raphidophytes". European Journal of Protistology. 49 (3): 328–353. doi:10.1016/j.ejop.2012.09.002. PMID 23219323.
- ^ Cavalier-Smith, Thomas (January 2018). "Kingdom Chromista and its eight phyla: a new synthesis emphasising periplastid protein targeting, cytoskeletal and periplastid evolution, and ancient divergences". Protoplasma. 255 (1): 297–357. doi:10.1007/s00709-017-1147-3. PMC 5756292. PMID 28875267.