Ancoracysta
| Ancoracysta | |
|---|---|
| Scientific classification Edit this classification | |
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| Genus: | Ancoracysta Janouškovec, Tikhonenkov, Burki, Howe, Rohwer, Mylnikov & Keeling 2017 |
| 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.[1]
Description
[edit | edit source]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
[edit | edit source]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] This species was later placed into a new genus, Nebulomonas, and is now called Nebulomonas marisrubri.[3]
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
[edit | edit source]- ^ a b c d 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, Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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External links
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