Genus: Alphaguttavirus

Genus: Alphaguttavirus

Distinguishing features

The sole member of this genus has been lost from collections. Therefore, the only distinguishing features are the morphological details given below.



The virions of Sulfolobus newzealandicus droplet-shaped virus (SNDV) are characterised by a "beard" of dense filaments at the pointed end of the particle (Figure 1.Guttaviridae). 

Physicochemical and physical properties

See discussion under family description.

Nucleic acid

The genomic DNA of SNDV cannot be cut by many restriction endonucleases but can be cut by the dam-methylation dependent restriction endonuclease DpnI, indicating that it is extensively methylated by a dam-like methylase at the N(6) position of the adenine residue in GATC sequences (Arnold et al., 2000).


SNDV virions have one major capsid protein of ~ 17.5 kDa.


See discussion under family description.


See discussion under family description.

Genome organization and replication

See discussion under family description.


SNDV was found in a carrier state in a Sulfolobus strain isolated from a solataric field sample in Steaming Hill, New Zealand. Virus production starts early in the stationary phase.

Species demarcation criteria

Not applicable

Member species

Exemplar isolate of the species
SpeciesVirus nameIsolateAccession numberRefSeq numberAvailable sequenceVirus Abbrev.
Sulfolobus newzealandicus droplet-shaped virusSulfolobus newzealandicus droplet-shaped virusNo entry in GenbankSnDV

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.