Biology:Ancoracysta twista
| Ancoracysta twista | |
|---|---|
Scientific classification 
| |
| Phylum: | Nebulidia |
| Class: | Nebulidea |
| Order: | Nebulidida |
| Family: | Nebulidae |
| Genus: | Ancoracysta |
| Species: | A. twista
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| Binomial name | |
| Ancoracysta twista Janouškovec, Tikhonenkov, Burki, Howe, Rohwer, Mylnikov & Keeling 2017[1]
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Ancoracysta twista is a eukaryotic microorganism. It is a predatory protist that appears to be related to Haptista.[1]
Description
Ancoracysta twista was first described in November 2017 in Current Biology. It was found in a sample collected from the surface of a tropical aquarium brain coral. It actively feeds on Procryptobia sorokini, probably immobilising its prey through discharging a previously unknown type of extrusome named an ancoracyst.[1]
Genetic analysis shows that it is not closely related to any known lineage, but it may be most closely related to a grouping of haptophytes and centrohelids (Haptista). It is notable for having a gene-rich mitochondrial genome, the largest known outside the jakobids or Diphylleia rotans. Uniquely, it appears to contain both the nucleus-encoded holocytochrome c synthase system III and the mitochondrion-encoded bacterial cytochrome c maturation system I.[1]
Taxonomy
A 2018 study from Cavalier-Smith, Chao & Lewis created a new subphylum and subsequent lower taxonomic ranks for Ancoracysta twista. They also created a new combination for Colponema marisrubri (Mylnikov & Tikhonenkov, 2009), which was shown to be ultrastructurally similar and phylogenetically close to A. twista, thus renaming it A. marisrubri.[2]
A 2022 study placed A. twista in a new supergroup Provora, closely related to other supergroups of Diaphoretickes such as Haptista, but no longer within Haptista.[3]
References
- ↑ 1.0 1.1 1.2 1.3 Janouškovec J, Tikhonenkov DV, Burki F, Howe AT, Rohwer FL, Mylnikov AP, Keeling PJ. "A New Lineage of Eukaryotes Illuminates Early Mitochondrial Genome Reduction", Current Biology 2017, doi:10.1016/j.cub.2017.10.051
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedCavalier-Smith - ↑ Tikhonenkov, Denis V.; Mikhailov, Kirill V.; Gawryluk, Ryan M. R.; Belyaev, Artem O.; Mathur, Varsha; Karpov, Sergey A.; Zagumyonnyi, Dmitry G.; Borodina, Anastasia S. et al. (2022). "Microbial predators form a new supergroup of eukaryotes". Nature 612 (7941): 714–719. doi:10.1038/s41586-022-05511-5. PMID 36477531. Bibcode: 2022Natur.612..714T.
External links
- Katarina Zimmer; Denis Tikhonenkov (image): A Newly Identified Species Represents Its Own Eukaryotic Lineage — The 10-micrometer-long flagellate cell might have a big story to tell about the evolution of eukaryotes. On: The Scientist. Nov 20, 2017
Wikidata ☰ Q47487266 entry
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