bacillarnavirus bacillarnavirus bacillarnavirus is a genus of viruses in the order picornavirales. marine diatoms serve as natural hosts. there are three species in this genus. bacillarnavirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: picornavirales family: marnaviridae genus: bacillarnavirus species chaetoceros socialis forma radians rna virus 1 chaetoceros tenuissimus rna virus 01 rhizosolenia setigera rna virus 01 taxonomy the genus contains the following three species: chaetoceros socialis forma radians rna virus 1 chaetoceros tenuissimus rna virus 01 rhizosolenia setigera rna virus 01 structure viruses in bacillarnavirus are non-enveloped, with icosahedral, spherical, and round geometries, and t=pseudo3 symmetry. the diameter is around 30-32 nm. genomes are linear and non-segmented, around 8.8-9.5kb in length. the genome has 2 open reading frames. genusstructuresymmetrycapsidgenomic arrangementgenomic segmentation bacillarnavirusicosahedralpseudo t=3non-envelopedlinearmonopartite life cycle viral replication is cytoplasmic. entry into the host cell is achieved by attachment of the virus to host receptors, which mediates endocytosis. replication follows the positive stranded rna virus replication model. positive stranded rna virus transcription is the method of transcription. marine diatoms serve as the natural host. genushost detailstissue tropismentry detailsrelease detailsreplication siteassembly sitetransmission bacillarnavirusmarine diatomsnoneunknownlysiscytoplasmcytoplasmunknown