Editing Virus classification (section)

===Reverse transcribing viruses===
All viruses that encode a [[reverse transcriptase]] (also known as RT or RNA-dependent DNA polymerase) are members of the class ''[[Revtraviricetes]]'', within the phylum ''Arterviricota'', kingdom ''Pararnavirae'', and realm ''[[Riboviria]]''. The class ''Blubervirales'' contains the single family ''[[Hepadnaviridae]]'' of DNA RT (reverse transcribing) viruses; all other RT viruses are members of the class [[Ortervirales]].<ref name="Riboviria">{{cite web|title=Proposal: Create a megataxonomic framework, filling all principal taxonomic ranks, for realm Riboviria|url=https://ictv.global/taxonomy/taxondetails?taxnode_id=201907238|last=Koonin EV, Dolja VV, Krupovic M, Varsani A, Wolf YI, Yutin N, Zerbini M, Kuhn JH|website=International Committee on Taxonomy of Viruses (ICTV)|language=en|access-date=2020-05-21}}</ref>
* '''Group VI''': viruses possess single-stranded RNA viruses that replicate through a DNA intermediate. The [[retrovirus]]es are included in this group, of which [[HIV]] is a member.
* '''Group VII''': viruses possess double-stranded DNA genomes and replicate using reverse transcriptase. The [[hepatitis B]] virus can be found in this group.
{| class="wikitable"
|+Examples of reverse transcribing viruses
|-
! Virus Family
! Examples (common names)
! Capsid<br> naked/enveloped
! Capsid<br> Symmetry
! Nucleic&nbsp;acid type
! Group
|-
| 1. ''[[Retrovirus|Retroviridae]]''
| [[HIV]]
| [[Viral envelope|Enveloped]]
|
|dimer RNA
|VI
|-
| 2. ''[[Caulimoviridae]]''
| [[Caulimovirus]], {{nowrap|[[Cacao swollen-shoot virus]] (CSSV)}}
| Naked
|
|
|VII
|-
| {{nowrap|3. ''[[Hepadnaviridae]]''}}
| [[Hepatitis B virus]]
| [[Viral envelope|Enveloped]]
| Icosahedral
| circular, partially ds
|VII
|}