raphidovirus raphidovirus raphidovirus (likely misspelled rhaphidovirus) is a genus of viruses, in the family phycodnaviridae. alga serve as natural hosts. there is only one species in this genus: heterosigma akashiwo virus 01 (hav01). raphidovirus virus classification (unranked): virus realm: varidnaviria kingdom: bamfordvirae phylum: nucleocytoviricota class: megaviricetes order: algavirales family: phycodnaviridae genus: raphidovirus structure schematic drawing of a typical phycodnaviridae virion (cross section and side view) viruses in raphidovirus are enveloped, with icosahedral and round geometries, and t=169 symmetry. the diameter is around 100-220 nm. genomes are linear, around 295kb in length. genusstructuresymmetrycapsidgenomic arrangementgenomic segmentation raphidovirusicosahedralt=169envelopedlinearmonopartite life cycle viral replication is nucleo-cytoplasmic. replication follows the dna strand displacement model. dna-templated transcription is the method of transcription. the virus exits the host cell by lysis via lytic phospholipids. alga serve as the natural host. transmission routes are passive diffusion. genushost detailstissue tropismentry detailsrelease detailsreplication siteassembly sitetransmission raphidovirusalganonecell receptor endocytosislysisnucleuscytoplasmpassive diffusion