''Alphamononivirus'' is a genus of enveloped,

positive-strand RNA viruses Positive-strand RNA viruses (+ssRNA viruses) are a group of related viruses that have positive-sense, single-stranded genomes made of ribonucleic acid. The positive-sense genome can act as messenger RNA (mRNA) and can be directly translated i ...

in the order ''

Nidovirales ''Nidovirales'' is an order of enveloped, positive-strand RNA viruses which infect vertebrates and invertebrates. Host organisms include mammals, birds, reptiles, amphibians, fish, arthropods, molluscs, and helminths. The order includes the f ...

'' which infect

planarian A planarian is one of the many flatworms of the traditional class (biology), class Turbellaria. It usually describes free-living flatworms of the order Tricladida (triclads), although this common name is also used for a wide number of free-li ...

flatworms The flatworms, flat worms, Platyhelminthes, or platyhelminths (from the Greek πλατύ, ''platy'', meaning "flat" and ἕλμινς (root: ἑλμινθ-), ''helminth-'', meaning "worm") are a phylum of relatively simple bilaterian, unsegment ...

. Member virus

planarian secretory cell nidovirus Planarian secretory cell nidovirus (PSCNV) is a virus of the species ''Planidovirus 1'', a nidovirus notable for its extremely large genome. At 41.1 kilobases, it is the largest known genome of an RNA virus. It was discovered by inspecting the tr ...

(PSCNV) has the largest known nonsegmented RNA genome of 41.1kb of any

RNA virus An RNA virus is a virusother than a retrovirusthat has ribonucleic acid (RNA) as its genetic material. The nucleic acid is usually single-stranded RNA ( ssRNA) but it may be double-stranded (dsRNA). Notable human diseases caused by RNA viruse ...

. The genus is

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

. It contains the subgenus ''Dumedivirus'', which contains only one species, ''Planidovirus 1''. ''Alphamononivirus'' is also the only member of the subfamily ''Mononivirinae'', which in turn is the only member of family ''Mononiviridae'', which likewise is the only member of the ''Monidovirineae'' suborder.

References

{{Taxonbar, from=Q57919736, from2=Q57880048, from3=Q57773890, from4=Q57751775, from5=Q57751030, from6=Q57743968 Virus genera Nidovirales