Genus: Bequatrovirus

Genus: Bequatrovirus

Distinguishing features

Members of this genus infect Bacillus cereus and Bacillus thuringiensis. The type species is Bacillus virus B4. Terminal repeats have been reported for some bequatrovirus genomes. The unique sequence of the genome of the exemplar isolate, of the type species is 163 kbp, with 277 gene coding sequences. No encoded tRNAs have been reported.


See discussion under family description.

Genome organisation and replication

See discussion under family description.


Members of the genus infect Bacillus cereus and Bacillus thuringiensis

Derivation of names

Bequatrovirus: derived from the name of the exemplar isolate, Bacillus phage B4, of the type species (phonetic B [Be] followed by quatro, derived from Italian for four, quattro).

Species demarcation criteria

Members of the same species are more than 95% identical in genome nucleotide sequence, including the terminal repeat region. Phages with genomes that differ by more than 5% are assigned to different species.

Member species

Exemplar isolate of the species
SpeciesVirus nameIsolateAccession numberRefSeq numberAvailable sequenceVirus Abbrev.
Bequatrovirus avesobmoreBacillus phage AvesoBmoreKT307976NC_028887Complete genome
Bequatrovirus B4Bacillus phage B4JN790865NC_018863Complete genome
Bequatrovirus B4Bacillus phage B5SJN797796Complete genome
Bequatrovirus bigberthaBacillus phage BigBerthaKF669647NC_022769Complete genome
Bequatrovirus rileyBacillus phage RileyKJ489402NC_024788Complete genome
Bequatrovirus spockBacillus phage SpockKF669662NC_022763Complete genome
Bequatrovirus trollBacillus phage TrollKF208639NC_022088Complete genome

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