Virus Properties by Family

Columns in the table with blue text headers can be sorted by clicking on the header text. Clicking twice will reverse the sort order.

Column 1
A numerical designation is provided for each indicated taxonomic family. This number is not persistent and will vary according to the settings of the selection filter. It  provides a means of counting the number of families matching the filters.

Family (sortable)
This column lists the virus families that are recognized in the current Master Species List (MSL).

Genera (sortable)
The number of genera present in the indicated family.

Species (sortable)
The number of species present in the indicated family.

Genome (sortable)
This column describes the chemical nature of the genome (DNA or RNA) and whether it is double-stranded (ds) or single stranded (ss). The suffix -RT indicates that reverse transcription is involved in the replication of the genome.

For ss genomes, the polarity of the genome is indicated: (+), mRNA polarity; (-), complementary to mRNA; (+/-), ambisense. At the family level, viruses with segmented genomes may have segments with different polarities (e.g., some arenaviruses have only ssRNA(-), others have ssRNA(-) and ssRNA(+/-) segments. In this case, the genome composition is designated as ssRNA(-); ssRNA(+/-) to indicate that both forms can be found in the genome.

Genome topology (sortable)
This column indicates if the genome is a linear or circular molecule and the number of segments

Total genome size (kb or kbp)
This column indicates the range of sizes encompassed by genomes of virus isolates described in the current Virus Metadata Resource (VMR).

Envelope (sortable)
This column indicates if the virion is known to have, or not have, a lipid envelope. A value of "Yes or No" indicates the variable presence of an envelope. Viruses identified only by metagenomics will usually not have a value in this column (envelope is "not determined").

Virion shape (sortable)
This column indicates the shape of the virion, as seen by electron microscopy. The column also includes some predicted morphologies but does not include information for many viruses identified only by metagenomics.

Virion size
This column indicates the typical range of virion sizes encompassed by virus isolates described in the current VMR.

Host (sortable)
This column indicates the known host(s) of viruses in the family. Hosts are uncertain for many viruses, especially those described by metagenomic analysis of environmental samples. The term protist is used to mean any eukaryotic organism that is not an animal, plant or fungus.

ICTV Report Chapter
This column provides a link to the relevant ICTV online report chapter.

Display families with the following properties:

Enter any part of a taxon name at the rank of family or higher to return the matching family names in that hierarchy
Family Genera Species Genome Genome topology Genome size (kb/kbp) Envelope Virion shape Virion size Host ICTV Report Chapter
51 Autotranscriptaviridae 48 414 dsDNA 1 linear segment 31.5-45.0 no head-tail 50-70 nm diameter head, 20 nm long tail bacteria
52 Avsunviroidae 3 5 ssRNA 1 circular segment 0.2-0.5 capsidless plants Avsunviroidae
53 Bacilladnaviridae 7 22 ssDNA(+/-) 1 partially double-stranded circular segment (+) 3.4-6.0 no icosahedral 35 nm diameter protists, invertebrates
54 Baculoviridae 4 104 dsDNA 1 circular segment 81.7-178.8 yes occluded or budded 30-60 nm diameter, 250-300 nm long invertebrates Baculoviridae
55 Barnaviridae 1 1 ssRNA(+) 1 linear segment 4.0-4.1 no bacilliform 20 nm diameter, 50 nm long fungi
56 Bartogtaviriformidae 1 1 dsDNA multisegmented uncertain no head-tail uncertain bacteria
57 Basaltiviridae 1 2 dsDNA 1 circular segment 13.2-14.0 predicted spindle-shaped archaea
58 Belpaoviridae 1 11 ssRNA-RT 2 identical linear segments 4.7-9.1 invertebrates, vertebrates Belpaoviridae
59 Benyviridae 1 5 ssRNA(+) 2-5 linear segments 11.2-16.0 no rod-shaped 20 nm diameter, 85-390 nm long plants Benyviridae
60 Berryhillviridae 9 21 dsDNA 1 linear segment 46.6-51.3 no head-tail 50-70 nm diameter head, 110 nm long tail bacteria
61 Betaflexiviridae 15 159 ssRNA(+) 1 linear segment 6.4-9.5 no filamentous 12 nm diameter, 600-1000 nm long plants Betaflexiviridae
62 Betagokushoviridae 24 26 ssDNA(+) 1 circular segment 4.0-5.1 no icosahedral 25-30 nm diameter bacteria
63 Betaormycoviridae 2 7 ssRNA 2 linear segments 3.9-4.7 fungi, protists
64 Bicaudaviridae 1 1 dsDNA 1 circular segment 62.7-62.8 no spindle-shaped 80-120 nm body, ≦400 nm tails archaea Bicaudaviridae
65 Bidnaviridae 1 1 ssDNA(+/-) 2 linear segments 12.5-12.6 no icosahedral 25 nm diameter invertebrates Bidnaviridae
66 Birnaviridae 7 11 dsRNA 2 linear segments 5.7-6.7 no icosahedral 65 nm diameter invertebrates, vertebrates Birnaviridae
67 Blefusviridae 1 1 dsDNA 1 linear segment 34.5-34.6 no predicted head-tail archaea
68 Blumeviridae 29 38 ssRNA(+) 1 linear segment 3.7-4.9 no spherical 25 nm diameter bacteria
69 Bornaviridae 4 18 ssRNA(-) 1 linear segment 8.7-11.1 yes spherical 70-130 nm diameter vertebrates Bornaviridae
70 Botourmiaviridae 9 150 ssRNA(+) 1 or 3 linear segments 1.6-5.2 no bacilliform or capsidless 32-60 nm long, 18 nm wide fungi, plants Botourmiaviridae
71 Botybirnaviridae 1 9 dsRNA 2 linear segments 11.0-12.5 no icosahedral 35-40 nm diameter fungi
72 Brachygtaviriformidae 1 1 dsDNA multisegmented uncertain no head-tail 45nm diameter head, 65 nm long tail bacteria
73 Bromoviridae 6 52 ssRNA(+) 3 linear segments 7.7-8.9 no icosahedral or bacilliform 26-35 nm diameter, or 18-26 nm diameter and 30-85 nm long plants Bromoviridae
74 Buchnerviridae 7 14 dsDNA 1 linear segment 38.4-61.4 no prolate head-tail 55-80 nm long and 50-70 nm wide head, 130-255 nm long tail bacteria
75 Burtonviroviridae 1 1 dsDNA 1 circular segment 29.7-29.8 protists
76 Caliciviridae 11 12 ssRNA(+) 1 linear segment 6.4-8.3 no icosahedral 27-40 nm diameter vertebrates Caliciviridae
77 Carmotetraviridae 1 1 ssRNA(+) 1 linear segment 6.1-6.2 icosahedral 40 nm diameter invertebrates Carmotetraviridae
78 Casidaviridae 15 41 dsDNA 1 linear segment 40.4-50.2 no head-tail 50 nm diameter head, 200 nm long tail bacteria
79 Casjensviridae 24 51 dsDNA 1 linear segment 54.4-64.0 no head-tail 50-70 nm diameter head, 200-230 nm long tail bacteria
80 Caulimoviridae 11 109 dsDNA-RT 1 circular segment 6.4-9.9 no spherical or bacilliform 45-50 nm diameter, or 30 nm diameter and 60-900 nm long plants Caulimoviridae
81 Chaacviridae 2 3 dsDNA 1 segment 10.1-10.8 predicted icosahedral archaea Chaacviridae
82 Chaseviridae 14 42 dsDNA 1 linear segment 50.7-57.5 no head-tail 53-65 nm diameter head, 116-166 nm long tail bacteria Chaseviridae
83 Chicoviridae 8 11 ssDNA(+) 1 circular segment 5.6-6.6 predicted icosahedral bacteria
84 Chimalliviridae 33 51 dsDNA 1 segment 211.2-316.7 no head-tail variable, 100-200 nm diameter head, 150-250 nm long tail bacteria
85 Chiyouviridae 1 1 dsDNA 1 linear segment 26.8-26.9 predicted filamentous archaea
86 Chrysoviridae 2 31 dsRNA 3-7 linear segments 8.8-16.1 no icosahedral 40 nm diameter fungi, plants, invertebrates Chrysoviridae
87 Chuviridae 16 43 ssRNA(-) 1-2 linear or circular segments 9.0-12.1 invertebrates, vertebrates Chuviridae
88 Circoviridae 2 160 ssDNA(+/-) 1 circular segment 1.6-2.4 no icosahedral 20 nm diameter invertebrates, vertebrates Circoviridae
89 Clavaviridae 1 1 dsDNA 1 circular segment 5.2-5.3 no rigid rods 16 nm diameter, 140 nm long archaea Clavaviridae
90 Clermontviridae 1 1 dsDNA 1 linear segment 37.6-37.7 predicted head-tail archaea
91 Closteroviridae 7 88 ssRNA(+) 1-3 linear segments 12.9-21.1 no filamentous 12 nm diameter, 650-2200 nm long plants Closteroviridae
92 Colingsworthviridae 7 13 dsDNA 1 linear segment 40.4-45.7 no head-tail 50 nm diameter head, 100 nm long tail bacteria
93 Connertonviridae 2 20 dsDNA 1 linear segment 123.8-183.2 no head-tail 75-80 nm diameter head, 100 nm long tail bacteria
94 Coronaviridae 6 54 ssRNA(+) 1 linear segment 25.4-36.7 yes pleomorphic, mostly spherical 80-160 nm diameter vertebrates Coronaviridae
95 Corticoviridae 1 2 dsDNA 1 circular segment 10.0-10.6 no icosahedral 56 nm diameter bacteria Corticoviridae
96 Cremegaviridae 2 2 ssRNA(+) 1 linear segment 14.9-17.8 yes spherical 50-100 nm diameter vertebrates
97 Crepuscuviridae 1 1 ssRNA(-) 1 linear segment 12.0-12.1 invertebrates Crepuscuviridae
98 Crevaviridae 4 9 dsDNA 1 segment 83.4-95.9 predicted head-tail bacteria
99 Cruliviridae 1 4 ssRNA(-) 3 linear segments 10.7-11.6 yes spherical 60-80 nm diameter invertebrates Cruliviridae
100 Curvulaviridae 1 8 dsRNA 2 linear segments 3.7-4.3 no icosahedral 27 nm diameter fungi