Name: Octadecabacter Gosink et al. 1998
Category, proposed as: genus, gen. nov.
Etymology: Oc.ta.de.ca.bac’ter. Gr. num. oktô, the number eight; Gr. fem. n. dekas, the number ten; N.L. masc. n. bacter, rod; N.L. masc. n. Octadecabacter, an 18-carbon fatty acid-containing rod
Gender, pronunciation (Latin): masculine (stem: Octadecabacter-), ok-ta-de-ka-BAK-ter
Type species: Octadecabacter arcticus Gosink et al. 1998
Conduct genome-based taxonomy of genus at TYGS
Effective publication:
Gosink J, Hewig RP, Staley JT. Octadecabacter arcticus gen. nov., sp. nov., nonpigmented, psychrophilic gas vacuolate bacteria from polar sea ice and water. Syst Appl Microbiol 1997; 20:356-365. 
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IJSEM list:
Anonymous. Validation list no. 64. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1998; 48:327-328.
Nomenclatural status: validly published under the ICNP
Taxonomic status: correct name
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Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 64, part 3 of the IJSEM. Int J Syst Evol Microbiol 2014; 64:1827-1829.
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Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 65, part 6 of the IJSEM. Int J Syst Evol Microbiol 2015; 65:2784-2785.
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Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 73, part 1 of the IJSEM. Int J Syst Evol Microbiol 2023; 73:5835.
Number of child taxa with a validly published and correct name: 7
Number of child taxa with a validly published name, including synonyms: 8
Total number of child taxa: 8
| Name | Nomenclatural status | Taxonomic status |
|---|---|---|
| Octadecabacter algicola Jin et al. 2023 | validly published under the ICNP | correct name |
| Octadecabacter antarcticus Gosink et al. 1998 | validly published under the ICNP | correct name |
| Octadecabacter arcticus Gosink et al. 1998 | validly published under the ICNP | correct name |
| Octadecabacter ascidiaceicola Kim et al. 2016 | validly published under the ICNP | correct name |
| Octadecabacter dasysiphoniae Jin et al. 2023 | validly published under the ICNP | correct name |
| Octadecabacter jejudonensis Park and Yoon 2014 | validly published under the ICNP | synonym |
| Octadecabacter ponticola Park et al. 2016 | validly published under the ICNP | correct name |
| Octadecabacter temperatus Billerbeck et al. 2015 | validly published under the ICNP | correct name |
Parent taxon: Roseobacteraceae Liang et al. 2021
Assigned by:
Liang KYH, Orata FD, Boucher YF, Case RJ. Roseobacters in a Sea of Poly- and Paraphyly: Whole Genome-Based Taxonomy of the Family Rhodobacteraceae and the Proposal for the Split of the "Roseobacter Clade" Into a Novel Family, Roseobacteraceae fam. nov. Front Microbiol 2021; 12:683109. 🇨🇦
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