| Ophiovirus | |
|---|---|
 | |
 | |
| (top)Electron micrograph ofCitrus psorosis ophiovirus; (bottom)Mirafiori lettuce big-vein virus genome | |
Virus classification | |
| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Negarnaviricota |
| Class: | Milneviricetes |
| Order: | Serpentovirales |
| Family: | Aspiviridae |
| Genus: | Ophiovirus |
| Species | |
Aspiviridae, formerlyOphioviridae, is a family of segmentednegative-strand RNA viruses which infectplants. Member viruses are characterized by an elongated and highlyfilamentous and flexiblenucleocapsid withhelicalsymmetry.[1] It is amonotypic taxon containing only one genus,Ophiovirus.Aspiviridae is also the only family in the orderSerpentovirales, which in turn is the only order in the classMilneviricetes.[2]
The nameAspiviridae derives from theLatinaspis (snake orviper), referring to the shape, along with the suffix for a virus family-viridae.[3]Ophiovirus derives from theAncient Greekophis, "snake", with –virus the suffix for a virus genus.[4] Likewise,Serpentovirales is from "serpent" with-virales the suffix for a virus order.[3]Milneviricetes is in honor ofRobert G. Milne, the last author on the first paper describing ophioviruses.[3][5]
The proteincapsid is non-enveloped and has a constant diameter of 1500–2500 nm and a width of 3 nm, or 9 nm. The capsids form kinked circles, which can collapse to form linear duplex structures, much like a spring.[2]
Member viruses have segmented,negative-sense, single-stranded RNA genomes. The entiregenome is 11000–12000nucleotides long.[2][6]
The family has one genus,Ophiovirus, which has eight recognized species. Members of both the family and the genus are referred to as ophioviruses.[2]Ophiovirus contains the following species, listed by scientific name and followed by the exemplar virus of the species:[7]