alvernaviridae alvernaviridae alvernaviridae is a family of non-enveloped positive-strand rna viruses. dinoflagellates serve as natural hosts. there is one genus in this family, dinornavirus, which contains one species: heterocapsa circularisquama rna virus 01. diseases associated with this family include host population control, possibly through lysis of the host cell. alvernaviridae alvernaviridae virion virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: sobelivirales family: alvernaviridae structure viruses in alvernaviridae are non-enveloped, with icosahedral and spherical geometries, and t=3 symmetry. the diameter is around 34 nm. genome genomes are linear and non-segmented, around 4.4kb in length. life cycle viral replication is cytoplasmic. entry into the host cell is achieved by penetration into the host cell. replication follows the positive-strand rna virus replication model in the cytoplasm. positive-strand rna virus transcription is the method of transcription. the virus is assembled in the cytoplasm. dinoflagellates serve as the natural host.