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 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
276 Steigviridae 12 17 dsDNA 1 linear segment 93.5–104.6 no head-tail 80 nm diameter head, 40 nm long tail bacteria
277 Steitzviridae 202 1289 ssRNA(+) 1 linear segment 3.3–5.2 no icosahedral 25 nm diameter bacteria
278 Straboviridae 36 209 dsDNA 1 linear segment 121.4–248.1 no prolate, head-tail 120 nm long and 86 nm wide head, 130 nm long tail bacteria
279 Sunviridae 1 1 ssRNA(-) 1 linear segment 17.1–17.2 vertebrates Sunviridae
280 Suolaviridae 1 1 dsDNA 1 linear segment 35.2–35.3 no head-tail 45–75 nm diameter head, tail variable or unknown archaea Suolaviridae
281 Suoliviridae 16 36 dsDNA 1 segment 92.6–104.8 predicted head-tail bacteria
282 Tectiviridae 5 12 dsDNA 1 linear segment 14.3–18.3 no icosahedral 66 nm diameter bacteria
283 Thaspiviridae 1 1 dsDNA 1 linear segment 27.5–29.0 no spindle-shaped 106–118 nm long, 61–67 nm wide archaea Thaspiviridae
284 Tobaniviridae 11 22 ssRNA(+) 1 linear segment 20.2–36.2 yes pleomorphic, mostly spherical 120–140 nm diameter vertebrates
285 Togaviridae 1 32 ssRNA(+) 1 linear segment 11.2–12.1 yes spherical 65–70 nm diameter invertebrates, vertebrates Togaviridae
286 Tolecusatellitidae 2 131 ssDNA; ssDNA(-) 1 circular segment 0.6–1.4 trans-encapsidated plants
287 Tombusviridae 18 97 ssRNA(+) 1–2 linear segments 3.6–6.1 no icosahedral 28–38 nm diameter plants
288 Tosoviridae 1 1 ssRNA(+/-) 2 linear segments 12.3–12.4 yes pleomorphic, mostly spherical 110–125 nm diameter vertebrates Tosoviridae
289 Tospoviridae 1 26 ssRNA(+/-) 3 linear segments 12.8–17.4 yes spherical 80–120 nm diameter plants, invertebrates
290 Toyamaviridae 3 3 dsDNA 1 linear segment 62.1–68.0 bacteria
291 Trimbiviridae 1 5 ssRNA(+/-) 1 circular segment 4.4–5.0 fungi
292 Tristromaviridae 2 3 dsDNA 1 linear segment 17.6–17.8 yes filamentous 30 nm diameter, 400 nm long archaea Tristromaviridae
293 Tulasviridae 2 2 ssRNA(+/-) 1 linear segment 12.1–14.3 fungi Tulasviridae
294 Turriviridae 1 2 dsDNA 1 circular segment 16.6–17.7 no icosahedral 100 nm diameter archaea Turriviridae
295 Tymoviridae 3 45 ssRNA(+) 1 linear segment 6.0–7.6 no icosahedral 30 mn diameter plants, invertebrates
296 Umezonoviridae 2 55 dsDNA 1 linear segment 28.7–31.8 bacteria
297 Unambiviridae 1 4 ssRNA(+/-) 1 circular segment 4.3–4.9 fungi
298 Ungulaviridae 1 1 dsDNA 1 linear segment 20.8–20.9 yes filamentous 24 nm diameter, 900 nm long archaea Ungulaviridae
299 Verdandiviridae 2 3 dsDNA 1 segment 19.5–20.5 predicted head-tail archaea
300 Vertoviridae 2 3 dsDNA 1 linear segment 55.1–58.5 no head-tail 60 nm diameter head, 110 nm long tail archaea Vertoviridae