Genus: Crustavirus


Genus: Crustavirus

Distinguishing features

The genus Crustavirus includes three species. Wenzhou crustavirus is the type species. The exemplar isolate of the type species, Wēnzhōu crab virus 1 (WzCV-1) was first described during a landmark next-generation sequencing study in China. The virus was found in Asian paddle crabs (Charybdis japonica A. Milne-Edwards, 1861) yellowish brown crabs (Charybdis lucifera Fabricius, 1798) and stalked barnacles (Capitulum mitella Foster, 1980) (Li et al., 2015).

Virion

Morphology

Not reported.

Nucleic acid

Non-segmented, negative-sense RNA.

Proteins

Known crustavirus genome sequences encode at least three proteins, a putative nucleocapsid protein, glycoprotein and RNA-directed RNA polymerase identified on the basis of sequence similarity and structural properties shared with mononegavirus homologues.

Genome organization and replication

Crustaviruses have negative-sense RNA genomes of 7.5–9.7 kb (Shi et al., 2016, Li et al., 2015). There is no data on virus replication.

Antigenicity

Not reported.

Biology

Crustavirus genome sequences were isolated from crabs and barnacles.

Species demarcation criteria

Due to the small number of genus members, no firm species demarcation criteria have been established beyond phylogeny and the hosts the viruses infect.

Member species

SpeciesVirus name(s)Exemplar isolateExemplar accession numberExemplar RefSeq numberAvailable sequenceOther isolatesOther isolate accession numbersVirus abbreviationIsolate abbreviation
Beihai crustavirusBěihǎi rhabdo-like virus 6BHJJX49420KX884405NC_032541Complete coding genomeBhRLV-6
Wenling crustavirusWēnlǐng crustacean virus 12WLJQ47777KX884457NC_032793Complete coding genomeWlCV-12
Wenzhou crustavirusWēnzhōu crab virus 1RBX2KM817644NC_031275Complete coding genomeWzCV1

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.

Derivation of names

Crustavirus: from Crustacea and virus, the suffix for a genus.