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
126 Hepadnaviridae 5 27 dsDNA-RT 1 circular segment 3.0–3.6 yes pleomorphic, mostly spherical 42–50 nm diameter vertebrates Hepadnaviridae
127 Hepeviridae 5 10 ssRNA(+) 1 linear segment 6.5–7.4 yes or no spherical or icosahedral 27–34 nm diameter vertebrates Hepeviridae
128 Herelleviridae 34 119 dsDNA 1 linear segment 106.0–167.5 no head-tail 84–94 nm diameter head, 140-220 nm long tail bacteria Herelleviridae
129 Hypoviridae 8 39 ssRNA(+) 1 linear segment 7.3–18.4 capsidless fungi, invertebrates Hypoviridae
130 Hytrosaviridae 2 2 dsDNA 1 circular segment 124.2–190.1 yes rod-shaped 65–1000 nm wide, 550–1000 nm long invertebrates Hytrosaviridae
131 Iflaviridae 1 16 ssRNA(+) 1 linear segment 8.8–11.0 no icosahedral 22–30 nm diameter invertebrates Iflaviridae
132 Inoviridae 26 52 ssDNA(+); ssDNA(+/-) 1 circular segment 5.2–10.9 no filamentous 7 nm diameter, 600–2500 nm long bacteria Inoviridae
133 Inseviridae 1 16 dsRNA 1 linear segment 5.3–6.6 no icosahedral 30 nm diameter invertebrates Inseviridae
134 Intestiviridae 12 19 dsDNA 1 segment 89.7–98.1 no head-tail 80 nm diameter head, 40 nm long tail bacteria
135 Iridoviridae 7 22 dsDNA 1 linear segment 102.6–288.9 yes or no icosahedral 150–220 nm diameter invertebrates, vertebrates Iridoviridae
136 Itzamnaviridae 2 2 dsDNA 1 segment 25.5–48.9 predicted spindle-shaped archaea
137 Kairosviridae 1 1 dsDNA 1 linear segment 34.1–34.2 predicted head-tail archaea
138 Kanorauviridae 24 89 ssDNA(+); ssDNA(+/-) 1 circular segment 1.7–4.0 plants, invertebrates, vertebrates
139 Kirkoviridae 10 12 ssDNA(+/-) 1 circular segment 2.8–4.3 vertebrates Kirkoviridae
140 Kitaviridae 3 11 ssRNA(+) 2-4 linear segments 12.0–15.1 yes pleomorphic, spherical and bacilliform 55–88 nm diameter or 25–70 nm wide and 55–120 nm long plants, invertebrates Kitaviridae
141 Kleczkowskaviridae 1 2 dsDNA 1 linear segment 206.8–207.7 no predicted head-tail bacteria
142 Kolmioviridae 11 21 ssRNA(-) 1 circular segment 1.5–1.8 yes spherical 36–43 nm diameter vertebrates Kolmioviridae
143 Konkoviridae 1 1 ssRNA(-) 4 linear segments 10.2–10.3 no filamentous 7–11 nm diameter, 300–1600 nm long plants Konkoviridae
144 Konodaiviridae 3 3 dsDNA 1 linear segment 56.8–57.7 bacteria
145 Kyanoviridae 54 66 dsDNA 1 linear segment 144.3–252.5 no diverse head-tail 60 nm diameter head, 20 nm long tail 120 nm long and 60 nm wide head, 120 nm long tail 140 nm long and 75 nm wide head, 325 nm long tail bacteria
146 Lebotiviridae 1 8 dsRNA 1 linear segment 6.7–8.1 no icosahedral 40 nm diameter invertebrates Lebotiviridae
147 Leishbuviridae 1 1 ssRNA(-) 3 linear segments 7.8–7.9 protists Leishbuviridae
148 Leisingerviridae 1 1 dsDNA 1 linear segment 26.1–26.2 no head-tail 55 nm diameter head, 210 nm long tail archaea Leisingerviridae
149 Lipothrixviridae 3 10 dsDNA 1 linear segment 31.3–41.2 yes filamentous 24–38 nm diameter, 410–1950 nm long archaea Lipothrixviridae
150 Lispiviridae 25 34 ssRNA(-) 1 linear segment 6.4–15.7 invertebrates Lispiviridae