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
251 Ruviroviridae 1 1 dsDNA 1 linear segment 26.2–26.3 protists
252 Saffermanviridae 5 10 dsDNA 1 linear segment 39.7–44.9 no head-tail 50 nm diameter head, 15 nm long tail bacteria
253 Salasmaviridae 13 35 dsDNA 1 linear segment 17.7–29.0 no prolate, head-tail 52–54 nm long and 29–45 nm wide head, 30 nm long tail bacteria
254 Saparoviridae 2 2 dsDNA 1 linear segment 52.6–54.3 no head-tail 50–110 nm diameter head, tail variable or unknown archaea Saparoviridae
255 Sarthroviridae 1 1 ssRNA(+) 1 linear segment 0.7–0.9 no icosahedral 15 nm diameter invertebrates Sarthroviridae
256 Schitoviridae 57 106 dsDNA 1 linear segment 59.0–79.4 no head-tail 50–70 nm diameter head, 10–40 nm long tail bacteria
257 Schizomimiviridae 2 2 dsDNA 1 linear segment 370.9–1421.2 no icosahedral 150–400 nm diameter protists
258 Secoviridae 9 131 ssRNA(+) 1–2 linear segments 8.8–15.5 no icosahedral 25–30 nm diameter plants Secoviridae
259 Sedoreoviridae 6 39 dsRNA 10–12 linear segments 17.8–25.8 no icosahedral 60–100 nm diameter protists, plants, invertebrates, vertebrates Sedoreoviridae
260 Shortaselviridae 1 1 dsDNA 1 linear segment 32.1–32.2 no head-tail 60 nm diameter head, 50 nm long tail archaea Shortaselviridae
261 Simuloviridae 1 3 dsDNA 1 circular segment 16.4–19.0 no icosahedral 70 nm diameter archaea Simuloviridae
262 Sinhaliviridae 1 2 ssRNA(+) 1 linear segment 5.9–6.0 no icosahedral 30 nm diameter invertebrates Sinhaliviridae
263 Skuldviridae 1 2 dsDNA 1 segment 11.2–11.5 predicted head-tail archaea
264 Smacoviridae 12 143 ssDNA(+/-) 1 circular segment 2.3–3.1 predicted icosahedral unknown, possibly archaea Smacoviridae
265 Soleiviridae 1 1 dsDNA 1 linear segment 63.3–63.4 no head-tail 47–108 nm diameter head, tail variable or unknown archaea Soleiviridae
266 Solemoviridae 5 120 ssRNA(+) 1 linear segment 3.9–6.4 no icosahedral 20–34 nm diameter plants Solemoviridae
267 Solinviviridae 2 2 ssRNA(+) 1 linear segment 10.4–11.0 no icosahedral 26–30 nm diameter invertebrates Solinviviridae
268 Solspiviridae 55 101 ssRNA(+) 1 linear segment 3.4–5.9 bacteria
269 Speroviridae 1 1 dsDNA 1 segment 42.4–42.5 predicted head-tail archaea
270 Sphaerolipoviridae 1 4 dsDNA 1 linear segment 28.0–31.4 no icosahedral 80 nm diameter archaea Sphaerolipoviridae
271 Spiciviridae 1 13 dsRNA 1 linear segment 6.1–8.8 plants, invertebrates
272 Spinareoviridae 9 58 dsRNA 9–12 linear segments 22.4–29.4 no icosahedral 60–85 nm diameter fungi, plants, invertebrates, vertebrates Spinareoviridae
273 Spiraviridae 1 1 ssDNA(+) 1 circular segment 24.8–24.9 no cylindrical 220–250 nm long, 30 nm wide archaea Spiraviridae
274 Sputniviroviridae 1 2 dsDNA 1 circular segment 17.2–18.4 no icosahedral 50–70 nm diameter protists
275 Stanwilliamsviridae 9 27 dsDNA 1 linear segment 125.7–135.7 no head-tail 80 nm diameter head, 350 nm long tail bacteria