Biology:Ancoracysta

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Ancoracysta
Scientific classification edit
Phylum: Nebulidia
Class: Nebulidea
Order: Nebulidida
Family: Nebulidae
Genus: Ancoracysta
Species:
A. twista
Binomial name
Ancoracysta twista
Janouškovec, Tikhonenkov, Burki, Howe, Rohwer, Mylnikov & Keeling 2017[1]

Ancoracysta is a genus of eukaryotic microbes containing the species Ancoracysta twista, 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. 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
  2. Cite error: Invalid <ref> tag; no text was provided for refs named Cavalier-Smith
  3. 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. Bibcode2022Natur.612..714T. 

External links

Wikidata ☰ Q47487266 entry