Guttaviridae

Guttaviridae is a family of viruses. Archaea serve as natural hosts. There are two genera in this family, containing one species each. The name is derived from the Latin gutta, meaning 'droplet'.

Taxonomy
The family currently contains one genera and species:
 * Betaguttavirus
 * Aeropyrum pernix ovoid virus 1

Genus Alphaguttavirus and  species Sulfolobus newzealandicus droplet-shaped virus were removed in ICTV version 2021.

Structure
Viruses in the family Guttaviridae are enveloped. The diameter is around 70–95 nm, with a length of 110–185 nm. Genomes are circular, around 20kb in length. The virons consist of a coat, a core, a nucleocapsid, and projecting fibers at the pointed end. The surface of the virion has a beehive-like ribbed surface pattern with protrusions that are densely covered by a 'beard' of long fibers at its pointed end. The genome is extremely heavily methylated.

Life cycle
DNA-templated transcription is the method of transcription. Archaea serve as the natural host.