Siphoviridae

Taxobox
virus_group = i
ordo = "Caudovirales"
familia = "Siphoviridae"
subdivision_ranks = Genera
subdivision = "λ-like viruses" "T1-like viruses" "T5-like viruses" "c2-like viruses" "L5-like viruses" "ψM1-like viruses" "φC31-like viruses" "N15-like viruses"

"Siphoviridae" are a family of double-stranded DNA viruses infecting only bacteria that are characterized by a long non-contractile tail and an isometric capsid (morphotype B1) or a prolate capsid (morphotype B2).

The "Siphoviridae" viruses have a capsid with a diameter of about 55-60 nm and a long tail that can reach up to 570 nm. Their double-stranded DNA is linear. This family includes the phage λ, the phage χ and the phage φ80.

The following genera are included here:
*Genus "λ-like viruses"; type species: "Enterobacteria phage λ"
*Genus "T1-like viruses"; type species: "Enterobacteria phage T1"
*Genus "T5-like viruses"; type species: "Enterobacteria phage T5"
*Genus "c2-like viruses"; type species: "Lactococcus phage c2"
*Genus "L5-like viruses"; type species: "Mycobacterium phage L5"
*Genus "ψM1-like viruses"; type species: "Methanobacterium ψM1"
*Genus "φC31-like viruses"; type species: "Streptomyces phage φC31"
*Genus "N15-like viruses"; type species: "Enterobacteria phage N15"