What is "salterprovirus"

Salterprovirus is a genus of viruses that infect extremely halophilic archaea (isolated from haloarcula hispanica. There is currently only one species in this genus: the type species His 1 virus, though His 2 virus (as yet unlisted by ICTV) is often discussed, even grouped, alongside His1V. The genus name is derived from salt terminal protein virus, as their linear dsDNA genomes have proteins attached to the 5' termini (i.e. terminal proteins). This virus morphotype is commonly observed in hypersaline waters around the world, and salterproviruses may represent an environmentally common halovirus.