| Calothrix | |
|---|---|
| |
| A 1921 drawing of Calothrix | |
Scientific classification 
| |
| Domain: | Bacteria |
| Kingdom: | Bacillati |
| Phylum: | Cyanobacteriota |
| Class: | Cyanophyceae |
| Order: | Nostocales |
| Family: | Rivulariaceae |
| Genus: | Calothrix Bornet & Flahault 1886[1] |
| Type species | |
| Calothrix confervicola Agardh ex Bornet and Flahault 1886 | |
| Species | |
|
Calothrix adscendens | |
Calothrix is a genus of cyanobacteria. They are generally found in freshwater.[2]
Removed members
[edit]Some members of the genus such as Calothrix rhizosoleniae are endosymbionts of diatoms, providing a nitrogen-fixing function.[3] It is assigned by Bergey's to Richelia, which is closely related to this species (unlike the rest of Calothrix.[4][5]
GTDB Release 10-RS226 (16th April 2025) does not include Calothrix as a genus, opting to instead assign its members to other genera. No genomes of the type species are available.[6]
References
[edit]- ^ "Calothrix". AlgaeBase. Retrieved 14 April 2018.
- ^ Rippka R, Castenholz RW, Herdman M (2015). "Form-Calothrix". In Whitman WB (ed.). Bergey's Manual of Systematics of Archaea and Bacteria. doi:10.1002/9781118960608.gbm00462.
- ^ Hilton JA, Foster RA, Tripp HJ, Carter BJ, Zehr JP, Villareal TA (23 April 2013). "Genomic deletions disrupt nitrogen metabolism pathways of a cyanobacterial diatom symbiont". Nature Communications. 4 (1) 1767. Bibcode:2013NatCo...4.1767H. doi:10.1038/ncomms2748. PMC 3667715. PMID 23612308.
- ^ Grujcic, Vesna; Mehrshad, Maliheh; Vigil-Stenman, Theo; Lundin, Daniel; Foster, Rachel A. (September 2025). "Stepwise genome evolution from a facultative symbiont to an endosymbiont in the N2-fixing diatom-Richelia symbioses". Current Biology. 35 (18): 4479–4493.e3. doi:10.1016/j.cub.2025.08.003.
- ^ "Richelia". Bergey's Manual of Systematics of Archaea and Bacteria. May 2022. doi:10.1002/9781118960608.gbm01520.
- ^ "GTDB - Search: Calothrix". gtdb.ecogenomic.org.
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