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
1 Abyssoviridae 1 1 ssRNA(+) 1 linear segment 35.9-36.0 invertebrates
2 Ackermannviridae 10 63 dsDNA 1 linear segment 143.2-164.1 no head-tail 80-105 nm diameter head, 111-143 nm long tail bacteria
3 Adamaviridae 18 22 ssDNA(+); ssDNA(+/-) 1-3 circular segments 1.7-4.1 predicted icosahedral invertebrates, vertebrates Adamaviridae
4 Adenoviridae 6 125 dsDNA 1 linear segment 24.6-48.4 no icosahedral 90 nm diameter vertebrates Adenoviridae
5 Aggregaviridae 1 1 dsDNA 1 segment 43.1-43.2 no head-tail 45 nm diameter head, 123 nm long tail bacteria
6 Ahmunviridae 1 1 dsDNA 1 segment 41.5-41.6 predicted rod-shaped archaea Ahmunviridae
7 Ahpuchviridae 1 1 dsDNA 1 segment 71.0-71.1 predicted head-tail archaea Ahpuchviridae
8 Aliceevansviridae 3 126 dsDNA 1 linear segment 32.0-45.7 no head-tail 50 nm diameter head, 120-200 nm long tail bacteria
9 Alisviridae 1 8 dsDNA 1 linear segment 33.2-35.3 no predicted head-tail bacteria
10 Aliusviridae 2 12 ssRNA(-) 1 linear segment 9.8-15.3 predicted yes invertebrates Aliusviridae
11 Alloherpesviridae 4 13 dsDNA 1 linear segment 134.2-295.2 yes pleomorphic, mostly spherical 150-200 diameter vertebrates Alloherpesviridae
12 Allomimiviridae 2 2 dsDNA 1 circular segment 668.0-668.1 no icosahedral 180-257 nm diameter protists
13 Alphaflexiviridae 6 72 ssRNA(+) 1 linear segment 5.4-8.9 no filamentous 470-670 nm long, 12-13 nm diameter fungi, plants Alphaflexiviridae
14 Alphaormycoviridae 2 9 ssRNA 2 linear segments 4.0-5.0 protists
15 Alphasatellitidae 18 85 ssDNA(+); ssDNA(+/-) 1 circular segment 0.9-1.6 trans-encapsidated plants, invertebrates
16 Alphatetraviridae 2 10 ssRNA(+) 1-2 linear segments 6.6-8.0 no icosahedral 32-40 nm diameter invertebrates Alphatetraviridae
17 Alternaviridae 1 5 dsRNA 3-4 linear segments 8.4-10.9 no icosahedral 30-33 nm diameter fungi Alternaviridae
18 Alvernaviridae 1 1 ssRNA(+) 1 linear segment 4.3-4.4 no icosahedral 28-32 nm diameter protists
19 Amalgaviridae 3 23 dsRNA 1 linear segment 2.8-3.5 no predicted filamentous fungi, plants Amalgaviridae
20 Amesuviridae 2 2 ssDNA(+/-) 1 circular segment 2.7-3.5 predicted icosahedral plants Amesuviridae
21 Amnoonviridae 1 1 ssRNA(-) 10 linear segments 10.3-10.4 yes spherical 75-80 nm diameter vertebrates Amnoonviridae
22 Ampullaviridae 1 3 dsDNA 1 linear segment 22.6-28.5 yes bottle-shaped 230 nm long, 4-75 nm wide archaea Ampullaviridae
23 Anaerodiviridae 1 1 dsDNA 1 linear segment 37.1-37.2 no head-tail 60 nm diameter head, 230 nm long tail archaea Anaerodiviridae
24 Andersonviridae 5 123 dsDNA 1 linear segment 78.3-92.1 no head-tail 70-80 nm diameter head, 120 nm long tail bacteria
25 Anelloviridae 37 243 ssDNA(-) 1 circular segment 1.7-4.0 no icosahedral 30-32 nm diameter invertebrates, vertebrates
26 Anicreviridae 9 9 ssDNA(+/-) 1 circular segment 1.9-2.5 predicted icosahedral invertebrates, vertebrates Anicreviridae
27 Aoguangviridae 1 1 dsDNA 1 linear segment 92.2-92.3 predicted head-tail archaea Aoguangviridae
28 Apasviridae 1 1 dsDNA 1 linear segment 108.2-108.3 no predicted head-tail archaea
29 Arenaviridae 5 71 ssRNA(-); ssRNA(+/-) 2-3 linear segments 9.2-17.9 yes pleomorphic, mostly spherical 40-150 nm diameter vertebrates Arenaviridae
30 Arenbergviridae 1 1 dsDNA 1 linear segment 286.7-286.8 no head-tail 131 nm diameter head, 136 nm long tail bacteria
31 Armatusviridae 1 1 dsDNA 1 linear segment 51.1-51.2 predicted head-tail archaea
32 Arteriviridae 13 23 ssRNA(+) 1 linear segment 12.7-15.8 yes spherical 50-74 nm diameter vertebrates Arteriviridae
33 Artiviridae 1 9 dsRNA 1 linear segment 6.7-8.3 no icosahedral 40 nm diameter invertebrates Artiviridae
34 Artoviridae 2 13 ssRNA(-) 1 linear segment 10.5-12.5 yes spherical 100-130 nm diameter plants, invertebrates Artoviridae
35 Ascoviridae 2 4 dsDNA 1 circular segment 119.3-199.8 yes oblong, bacilliform, ovoid or allantoid 130 nm diameter, 200-400 nm long invertebrates Ascoviridae
36 Asemoviridae 2 2 dsDNA 1 circular segment 10.0-10.6 inner membrane icosahedral 80 nm diameter bacteria
37 Asfarviridae 1 1 dsDNA 1 linear segment 170.1-193.9 yes pleomorphic, mostly spherical 175-215 nm diameter invertebrates, vertebrates Asfarviridae
38 Aspiviridae 1 8 ssRNA(-); ssRNA(+/-) 3-4 linear segments 11.0-12.5 no filamentous 700-2000 nm long, 3 nm diameter plants Aspiviridae
39 Assiduviridae 3 3 dsDNA 1 linear segment 53.3-57.5 no head-tail 57 nm diameter head, 90-140 nm long tail bacteria
40 Astroviridae 2 22 ssRNA(+) 1 linear segment 6.1-7.4 no icosahedral 28-35 nm diameter vertebrates Astroviridae
41 Atkinsviridae 123 262 ssRNA(+) 1 linear segment 3.3-4.7 no icosahedral 30 nm diameter bacteria
42 Autolykiviridae 4 5 dsDNA 1 linear segment 10.0-10.7 no icosahedral 85 nm diameter bacteria
43 Autonotataviridae 41 99 dsDNA 1 linear segment 30.7-45.0 no head-tail 50-70 nm diameter head, 20 nm long tail bacteria
44 Autoscriptoviridae 37 277 dsDNA 1 linear segment 35.5-49.4 no head-tail 50-70 nm diameter head, 20 nm long tail bacteria
45 Autosignataviridae 19 76 dsDNA 1 linear segment 37.7-47.9 no head-tail 50-70 nm diameter head, 20 nm long tail bacteria
46 Autotranscriptaviridae 48 411 dsDNA 1 linear segment 31.5-45.0 no head-tail 50-70 nm diameter head, 20 nm long tail bacteria
47 Avsunviroidae 3 5 ssRNA 1 circular segment 0.2-0.5 capsidless plants Avsunviroidae
48 Bacilladnaviridae 7 22 ssDNA(+/-) 1 circular segment (+) and 1 linear segment (-) 4-6 (+), 0.8 (-) no icosahedral 35 nm diameter protists, invertebrates
49 Baculoviridae 4 101 dsDNA 1 circular segment 81.7-178.8 yes occluded or budded 30-60 nm diameter, 250-300 nm long invertebrates Baculoviridae
50 Barnaviridae 1 1 ssRNA(+) 1 linear segment 4.0-4.1 no bacilliform 20 nm diameter, 50 nm long fungi