Wikipedia
Alphafusellovirus
Alphafusellovirus is a genus of viruses, in the family Fuselloviridae. Species in the genus Sulfolobus (sulfolobus shibatae, Sulfolobus solfataricus, and Sulfolobus islandicus) serve as natural hosts. There are currently seven species in this genus including the type species Sulfolobus spindle-shaped virus 1 (SSV1 or SSV-1)