Cenarchaeales

Rule 7a

The taxonomic categories covered by these rules are given below in descending taxonomic rank.

• Phylum
• Class
• Order
• Family
• Genus
• Species
• Subspecies

Rule 7b

The relative order of these categories may not be altered in any classification even though definitions of taxonomic categories may vary with individual opinion.

Rule 9b

A later homonym of a name formed under the nomenclatural codes listed in Principle 2 cannot be used.

Recommendation 9

To form new prokaryotic names, authors are advised as follows:

1. Names that are very long or difficult to pronounce should be avoided.
2. Names should differ by at least three characters from existing names of genera or species within the same genus.
3. Languages other than Latin should be avoided when Latin equivalents exist or can be constructed by combining Latin word elements. Exceptions include names derived from local items such as foods, drinks, geographic localities, and other names for which no Latin words exist.
4. Authors should not name organisms after themselves. If names are formed from personal names, they should contain only the name of one person. They may contain the untruncated family and/or first names.
5. All personal genus names should be feminine regardless of the gender identity of the person they commemorate.
6. Names should not be deliberately contentious or abusive of any person, race, religion, political belief, or ideology.
7. Names that include mnemonic cues are preferred because they promote learning and memory.

Rule 20

Only taxa with legitimate names may serve as types for taxa higher than the rank of species.

Rule 24a

Effective publication under the SeqCode means that the name and evidence for the taxon have been published in a peer-reviewed journal or book.

Rule 26

A name of a new taxon, or a new combination for an existing taxon, is not validly published unless the following criteria are met:

1. The name is effectively published under the rules of the SeqCode.
2. The name is registered in the SeqCode Registry, along with mandatory data fields listed below.
3. The type of the taxon is clearly designated. In the case of species or subspecies, the type sequence is deposited according to Rule 18a and the accession number cited.
4. The taxonomic rank is designated.
5. The derivation (etymology) of a new name (and if necessary of a new combination) is given wherein one or more distinguishable roots are identified. Roots can originate from any language in use or extinct (see also Recommendation 9).

Note 1. When a new species or a new combination results in the proposal of a new genus, both the new genus name and the new species name or the new combination must be validly published. Publication of the new species epithet or new combination alone does not constitute valid publication of the new genus name.

Note 2. When possible, authors are recommended to include the SeqCode Registry identifier in the effective publication.

Note 3. If the information provided in the registration and the effective publication differ, the registration is considered definitive.