phaeovirus phaeovirus phaeovirus is a genus of viruses, in the family phycodnaviridae. alga serve as natural hosts. there are nine species in this genus. phaeovirus virus classification (unranked): virus realm: varidnaviria kingdom: bamfordvirae phylum: nucleocytoviricota class: megaviricetes order: algavirales family: phycodnaviridae genus: phaeovirus taxonomy the genus contains the following species: ectocarpus fasciculatus virus a ectocarpus siliculosus virus 1 ectocarpus siliculosus virus a feldmannia irregularis virus a feldmannia species virus feldmannia species virus a hincksia hinckiae virus a myriotrichia clavaeformis virus a pilayella littoralis virus 1 structure schematic drawing of a typical phycodnaviridae virion (cross section and side view) viruses in phaeovirus are enveloped, with icosahedral and round geometries, and t=169 symmetry. the diameter is around 120-150 nm. genomes are linear, around 150-350kb in length. genusstructuresymmetrycapsidgenomic arrangementgenomic segmentation phaeovirusicosahedralt=169envelopedlinearmonopartite life cycle viral replication is nucleo-cytoplasmic, and is lysogenic. 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 phaeovirusalganonecell receptor endocytosislysisnucleuscytoplasmpassive diffusion