Table 3.
Orders, families and floating genera of viruses according to the seventh ICTV report (1999)
| Criteria | Order | Family | Floating genus | Morphology | Genome configuration | Genome size (kb) | Virus host |
Number of species |
|||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Species | Strains/serotypes | Tentative | Total | ||||||||
| dsDNA | Caudovirales | Myoviridae | Tailed phage | 1 linear | 336 | Bacteria, archaea | 15 | 23 | 117 | 155 | |
| Siphoviridae | Tailed phage | 1 linear | 53 | Bacteria, archaea | 7 | 0 | 137 | 144 | |||
| Podoviridae | Tailed phage | 1 linear | 40 | Bacteria, archaea | 8 | 12 | 66 | 86 | |||
| Tectiviridae | Isometric | 1 linear | 16 | Bacteria | 4 | 0 | 38 | 42 | |||
| Corticoviridae | Isometric | 1 circular supercoiled | 10 | Bacteria | 1 | 0 | 2 | 3 | |||
| Plasmaviridae | Pleomorphic | 1 circular | 12 | Mycoplasma | 1 | 0 | 7 | 8 | |||
| Lipothrixviridae | Rod | 1 linear | 16 | Archaea | 2 | 0 | 0 | 2 | |||
| Rudiviridae | Rod | 1 linear | 33–36 | Archaea | 2 | 0 | 1 | 3 | |||
| Fuselloviridae | Lemon-shape | 1 circular supercoiled | 15 | Archaea | 1 | 0 | 0 | 1 | |||
| “SNDV-like viruses” | Droplet-shape | 1 circular | 20 | Archaea | 1 | 0 | 0 | 1 | |||
| Poxviridae | Ovioid | 1 linear | 130–375 | Vertebrate, invertebrate | 62 | 8 | 23 | 93 | |||
| Asfarviridae | Isometric | 1 circular | 170–190 | Vertebrate | 1 | 0 | 0 | 1 | |||
| Iridoviridae | Isometric | 1 linear | 160–400 | Vertebrate, invertebrate | 17 | 4 | 3 | 24 | |||
| Phycodnaviridae | Isometric | 1 linear | 250–350 | Algae | 27 | 0 | 38 | 65 | |||
| Baculoviridae | Bacilliform | 1 circular supercoiled | 90–230 | Invertebrate | 17 | 6 | 7 | 30 | |||
| Herpesviridae | Isometric | 1 linear | 120–220 | Vertebrate | 56 | 0 | 65 | 121 | |||
| Adenoviridae | Isometric | 1 linear | 32–48 | Vertebrate | 26 | 102 | 35 | 163 | |||
| Rhizidiovirus | Isometric | 1 linear | 27 | Fungus | 1 | 0 | 0 | 1 | |||
| Polyomaviridae | Isometric | 1 circular | 5 | Vertebrate | 12 | 4 | 0 | 16 | |||
| Papillomaviridae | Isometric | 1 circular | 6.8–8.4 | Vertebrate | 7 | 0 | 88 | 95 | |||
| Polydnaviridae | Rod, fusiform | 1 circular supercoiled | 2–28 | Invertebrate | 59 | 0 | 0 | 59 | |||
| Ascoviridae | Ovoid and bacilliform | 1 circular | 100–180 | Invertebrate | 3 | 0 | 1 | 4 | |||
| 330 | 159 | 628 | 117 | ||||||||
| ssDNA | Inoviridae | Rod | 1 circular | 7–20 | Bacteria, mycoplasma | 36 | 7 | 5 | 48 | ||
| Microviridae | Isometric | 1 circular | 6 | Bacteria, spiroplasma | 7 | 0 | 33 | 40 | |||
| Geminivirus | Isometric | 1 or 2 circular | 3–6 | Plant | 94 | 2 | 10 | 106 | |||
| Circoviridae | Isometric | 1 circular | 1.7–2.3 | Vertebrate | 3 | 0 | 1 | 4 | |||
| Nanovirus | Isometric | 6–9 circular | 6–9 | Plant | 4 | 0 | 1 | 5 | |||
| Parvoviridae | Isometric | 1 − strand | 6–8 | Vertebrate, invertebrate | 38 | 0 | 16 | 54 | |||
| 182 | 9 | 66 | 257 | ||||||||
| ssDNA RT | Hepadnaviridae | Isometric | 1 circular – strand | 3 | Vertebrate | 5 | 0 | 2 | 7 | ||
| dsDNA RT | Caulimoviridae | Isometric, bacilliform | 1 circular | 8 | Plant | 26 | 0 | 8 | 34 | ||
| ssRNA RT | Pseudoviridae | Ovoid | 1 linear | 5–8 | Yeast, plant | 15 | 0 | 0 | 15 | ||
| ssRNA RT | Metaviridae | Isometric | 1 linear | 4–10 | Yeast, fungus, Invertebrate | 18 | 0 | 1 | 19 | ||
| ssRNA RT | Retroviridae | Spherical | dimer 1 + segment | 7–10 | Vertebrate | 59 | 44 | 2 | 105 | ||
| 123 | 44 | 13 | 180 | ||||||||
| dsRNA | Cystoviridae | Isometric | 3 segments | 17 | Bacteria | 1 | 0 | 0 | 1 | ||
| Reoviridae | Isometric | 10–12 segments | 19–62 | Vertebrate, invertebrate, plant | 62 | 256 | 39 | 357 | |||
| Birnaviridae | Isometric | 2 segments | 6 | Vertebrate, invertebrate | 4 | 21 | 1 | 26 | |||
| Totiviridae | Isometric | 1 segment | 5–7 | Fungus, protozoa | 18 | 0 | 5 | 23 | |||
| Partitiviridae | Isometric | 2 segments | 3–10 | Fungus, plant | 30 | 0 | 15 | 45 | |||
| Hypoviridae | Pleomorphic | 1 segment | 9–13 | Fungus | 3 | 0 | 2 | 5 | |||
| Varicosavirus | Rod | 2 segments | 14 | Plant | 1 | 0 | 3 | 4 | |||
| 119 | 277 | 65 | 461 | ||||||||
| Negative | Mononegavirales | Bornaviridae | Spherical | 1 − segment | 9 | Vertebrate | 1 | 0 | 1 | 2 | |
| ssRNA | |||||||||||
| Filoviridae | Bacilliform | 1 − segment | 13 | Vertebrate | 5 | 19 | 0 | 24 | |||
| Paramyxoviridae | Helical | 1 − segment | 15–16 | Vertebrate | 31 | 5 | 2 | 38 | |||
| Rhabdoviridae | Bacilliform | 1 − segment | 10–13 | Vertebrate, plant | 37 | 0 | 142 | 179 | |||
| Orthomyxoviridae | Helical | 8 − segments | 13–14 | Vertebrate | 5 | 1 | 0 | 6 | |||
| Bunyaviridae | Spherical | 3 − segments | 12–23 | Vertebrate, plant | 93 | 236 | 66 | 395 | |||
| Tenuivirus | Filaments | 4 −?segments | 15–19 | Plant | 6 | 0 | 5 | 11 | |||
| Ophiovirus | Filaments | 3 − segments | 12 | Plant | 3 | 0 | 0 | 3 | |||
| Arenaviridae | Spherical | 2 − segments | 11 | Vertebrate | 19 | 27 | 2 | 48 | |||
| Deltavirus | Spherical | 1 circular − strand | 1.7 | Vertebrate | 1 | 0 | 0 | 1 | |||
| 201 | 288 | 218 | 707 | ||||||||
| Positive ssRNA | Leviviridae | Isometric | 1 + segment | 3–4 | Bacteria | 4 | 18 | 35 | 57 | ||
| Narnaviridae | Ribonucleic complex | 1 + segment | 2.5 | Yeast | 3 | 0 | 0 | 3 | |||
| Picornaviridae | Isometric | 1 + segment | 7–8.5 | Vertebrate | 16 | 105 | 137 | 258 | |||
| “CrPV-like viruses” | Isometric | 1 + segment | 9–10 | Invertebrate | 5 | 0 | 0 | 5 | |||
| Sequiviridae | Isometric | 1 + segment | 9–12 | Plant | 5 | 0 | 0 | 5 | |||
| Comoviridae | Isometric | 2 + segments | 9–16 | Plant | 50 | 0 | 9 | 59 | |||
| Potyviridae | Rod | 1 or 2 + segments | 8–12 | Plant | 106 | 0 | 92 | 198 | |||
| Caliciviridae | Isometric | 1 + segment | 8 | Vertebrate | 6 | 40 | 8 | 54 | |||
| “HEV-like viruses” | Isometric | 1 + segment | 7 | Vertebrate | 1 | 0 | 0 | 1 | |||
| Astroviridae | Isometric | 1 + segment | 7–8 | Vertebrate | 6 | 13 | 0 | 19 | |||
| Nodaviridae | Isometric | 2 + segments | 5 | Vertebrate, invertebrate | 14 | 0 | 0 | 14 | |||
| Tetraviridae | Isometric | 1 + segment | 5 | Invertebrate | 9 | 0 | 0 | 9 | |||
| Sobemovirus | Isometric | 1 + segment | 4 | Plant | 11 | 0 | 3 | 14 | |||
| Marafivirus | Isometric | 1 + segment | 6–7 | Plant | 3 | 0 | 0 | 3 | |||
| Luteoviridae | Isometric | 1 or 2 + segment | 6–9 | Plant | 8 | 0 | 11 | 9 | |||
| Umbravirus | No particles | 1 + segment | 4 | Plant | 7 | 0 | 15 | 22 | |||
| Tombusviridae | Isometric | 1 or 2 + segment | 4–5.5 | Plant | 38 | 0 | 11 | 49 | |||
| Nidovirales | Coronaviridae | Pleomorphic | 1 + segment | 28–33 | Vertebrate | 16 | 5 | 1 | 22 | ||
| Arteriviridae | Spherical | 1 + segment | 13–16 | Vertebrate | 4 | 0 | 0 | 4 | |||
| Flaviviridae | Isometric | 1 + segment | 10–12 | Vertebrate | 57 | 47 | 6 | 110 | |||
| Togaviridae | Isometric | 1 + segment | 10–13 | Vertebrate | 23 | 6 | 0 | 29 | |||
| ssRNA | Tobamovirus | Rod | 1 + segment | 6 | Plant | 16 | 0 | 3 | 19 | ||
| Positive sense | Tobravirus | Rod | 2 + segments | 9–11 | Plant | 3 | 0 | 0 | 3 | ||
| Hordeivirus | Rod | 3 + segments | 10 | Plant | 4 | 0 | 0 | 4 | |||
| Furovirus | Rod | 2 + segments | 9–11 | Plant | 1 | 0 | 4 | 5 | |||
| Pomovirus | Rod | 3 + segments | 12 | Plant | 4 | 0 | 0 | 4 | |||
| Pecluvirus | Rod | 2 + segments | 10 | Plant | 2 | 0 | 0 | 2 | |||
| Benyvirus | Rod | 4 (or 5) + segments | 14–16 | Plant | 2 | 0 | 0 | 2 | |||
| Bromoviridae | Isometric, bacilliform | 3 + segments | 8–9 | Plant | 28 | 0 | 0 | 28 | |||
| Ourmiavirus | Bacilliform | 3 + segments | 4–5 | Plant | 3 | 0 | 0 | 3 | |||
| Idaeovirus | 3 + segments | 8 | Plant | 1 | 0 | 1 | |||||
| Closteroviridae | Rod | 1 or 2 + segments | 15–19 | Plant | 18 | 0 | 16 | 34 | |||
| Capillovirus | Rod | 1 + segment | 7 | Plant | 3 | 0 | 1 | 4 | |||
| Trichovirus | Rod | 1 + segment | 7.5 | Plant | 3 | 0 | 1 | 4 | |||
| Vitivirus | Rod | 1 + segment | 7.5 | Plant | 4 | 0 | 1 | 5 | |||
| Tymovirus | Isometric | 1 + segment | 6 | Plant | 20 | 0 | 1 | 21 | |||
| Carlavirus | Rod | 1 + segment | 7–8 | Plant | 31 | 0 | 29 | 60 | |||
| Potexvirus | Rod | 1 + segment | 6 | Plant | 26 | 0 | 18 | 44 | |||
| Allexivirus | Rod | 1 + segment | 9 | Plant | 6 | 0 | 3 | 9 | |||
| Foveavirus | Rod | 1 + segment | 8–9 | Plant | 2 | 0 | 1 | 3 | |||
| Barnaviridae | Bacilliform | 1 + segment | 4 | Fungus | 1 | 0 | 1 | 2 | |||
| 565 | 234 | 403 | 1202 | ||||||||
| Unassigned viruses | — | — | — | All | 30 | 0 | 0 | 30 | |||
| 1550 | 1011 | 1393 | 3954 | ||||||||
| Viroids | — | — | — | Plant | 27 | 0 | 8 | 35 | |||
| Satellites | — | — | — | Plant | 33 | 0 | 6 | 39 | |||