Telonema

{{Short description|Genus of single-celled organisms}}

{{Automatic taxobox

| taxon = Telonema

| authority = Griessmann, 1913

| type_species = Telonema subtile

| type_species_authority = Griessmann, 1913

| subdivision_ranks = Other species

| subdivision = * T. antarcticum Thomsen 2005

}}

Telonema is a genus of single-celled organisms.

Some sources group Telonema within the cryptomonads-haptophytes assemblage.{{Cite web|url=http://tolweb.org/Eukaryotes/3 |title=Eukaryotes |access-date=2009-06-17}} It is sometimes assigned to a unique phylum, Telonemia.{{Cite journal|author=Shalchian-Tabrizi K, Eikrem W, Klaveness D |title=Telonemia, a new protist phylum with affinity to chromist lineages |journal=Proc. Biol. Sci. |volume=273 |issue=1595 |pages=1833–42 |date=July 2006|pmid=16790418 |pmc=1634789 |doi=10.1098/rspb.2006.3515 |display-authors=etal}} Although Telonema is within the Eukaryota Domain, it does not have any close relations to other organisms within that domain.{{Cite journal|last=Yabuki, Eikrem, Takishita, J. Patterson|first=Akinori, Wenche, Kiyotaka, David|date=July 2013|title=Fine Structure of Telonema subtilis Griessmann, 1913: A Flagellate with a Unique Cytoskeletal Structure Among Eukaryotes|journal=Protist|volume=164|issue=4|pages=556–569|doi=10.1016/j.protis.2013.04.004|pmid=23796965}} However, it was once thought Telonema was closely related to photosynthetic cryptomonads, or stramenopiles and centrohelids, but there was not enough data to prove this.{{Cite journal|last=Burki, F., Inagaki, Y., Bråte, J., Archibald, J. M., Keeling, P. J., Cavalier-Smith, T., … Shalchian-Tabrizi, K. (2009). Large-scale phylogenomic analyses reveal that two enigmatic protist lineages, telonemia and centroheliozoa, are related to photosynthetic chromalveolates. Genome biology and evolution, 1, 231–238. doi:10.1093/gbe/evp022|date=July 2009|title=Large-Scale Phylogenomic Analyses Reveal That Two Enigmatic Protist Lineages, Telonemia and Centroheliozoa, Are Related to Photosynthetic Chromalveolates|journal=Genome Biology and Evolution|volume=1|pages=231–238|doi=10.1093/gbe/evp022|pmc=2817417|pmid=20333193}} After a study of 127 genes across 72 species, they found that Telonema subtile could be related to Alveolata and Rhizaria.