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
301 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
302 Schizomimiviridae 2 2 dsDNA 1 linear segment 370.9-1421.2 no icosahedral 150-400 nm diameter protists
303 Secoviridae 10 165 ssRNA(+) 1-2 linear segments 8.8-15.5 no icosahedral 25-30 nm diameter plants Secoviridae
304 Sedoreoviridae 7 45 dsRNA 10-12 linear segments 17.8-25.8 no icosahedral 60-100 nm diameter protists, plants, invertebrates, vertebrates Sedoreoviridae
305 Shortaselviridae 1 1 dsDNA 1 linear segment 32.1-32.2 no head-tail 60 nm diameter head, 50 nm long tail archaea Shortaselviridae
306 Simuloviridae 1 3 dsDNA 1 circular segment 16.4-19.0 no icosahedral 70 nm diameter archaea Simuloviridae
307 Sinhaliviridae 1 2 ssRNA(+) 1 linear segment 5.9-6.0 no icosahedral 30 nm diameter invertebrates Sinhaliviridae
308 Skuldviridae 1 2 dsDNA 1 segment 11.2-11.5 predicted head-tail archaea
309 Smacoviridae 12 143 ssDNA(+/-) 1 circular segment 2.2-3.1 predicted icosahedral predicted archaea Smacoviridae
310 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
311 Solemoviridae 5 120 ssRNA(+) 1 linear segment 3.9-6.4 no icosahedral 20-34 nm diameter plants Solemoviridae
312 Solinviviridae 2 2 ssRNA(+) 1 linear segment 10.4-11.0 no icosahedral 26-30 nm diameter invertebrates Solinviviridae
313 Solspiviridae 55 101 ssRNA(+) 1 linear segment 3.4-5.9 bacteria
314 Soropartitiviridae 1 1 dsRNA 2 linear segments 3.4 bacteria
315 Speroviridae 1 1 dsDNA 1 segment 42.4-42.5 predicted head-tail archaea
316 Sphaerolipoviridae 1 4 dsDNA 1 linear segment 28.0-31.4 no icosahedral 80 nm diameter archaea Sphaerolipoviridae
317 Spiciviridae 1 13 dsRNA 1 linear segment 6.1-8.8 plants, invertebrates
318 Spinareoviridae 9 58 dsRNA 9-12 linear segments 22.4-29.4 no icosahedral 60-85 nm diameter fungi, plants, invertebrates, vertebrates Spinareoviridae
319 Spiraviridae 1 1 ssDNA(+) 1 circular segment 24.8-24.9 no cylindrical 220-250 nm long, 30 nm wide archaea Spiraviridae
320 Splipalmiviridae 3 16 ssRNA(+) 2-4 linear segments 4.0-7.0 fungi
321 Sputniviroviridae 1 2 dsDNA 1 circular segment 17.2-18.4 no icosahedral 50-70 nm diameter protists
322 Stackebrandtviridae 8 66 dsDNA 1 linear segment 55.0-61.3 no head-tail 50-70 nm diameter head, 150-300 nm long tail bacteria
323 Stanwilliamsviridae 9 27 dsDNA 1 linear segment 125.7-135.7 no head-tail 80 nm diameter head, 350 nm long tail bacteria
324 Steigviridae 12 17 dsDNA 1 linear segment 93.5-104.6 no head-tail 80 nm diameter head, 40 nm long tail bacteria
325 Steitzviridae 202 1289 ssRNA(+) 1 linear segment 3.2-5.2 no icosahedral 25 nm diameter bacteria
326 Straboviridae 37 209 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
327 Sunviridae 1 1 ssRNA(-) 1 linear segment 17.1-17.2 vertebrates Sunviridae
328 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
329 Suoliviridae 16 36 dsDNA 1 segment 92.6-104.8 predicted head-tail bacteria
330 Tectiviridae 5 12 dsDNA 1 linear segment 14.3-18.3 no icosahedral 66 nm diameter bacteria
331 Thalassapleoviridae 3 5 dsDNA 1 circular segment 13.3-18.0 yes pleomorphic 50 nm diameter archaea
332 Thaspiviridae 1 1 dsDNA 1 linear segment 27.5-29.0 no spindle-shaped 106-118 nm long, 61-67 nm wide archaea Thaspiviridae
333 Tobaniviridae 11 22 ssRNA(+) 1 linear segment 20.2-36.2 yes pleomorphic, mostly spherical 120-140 nm diameter vertebrates
334 Togaviridae 1 32 ssRNA(+) 1 linear segment 11.2-12.1 yes spherical 65-70 nm diameter invertebrates, vertebrates Togaviridae
335 Tolecusatellitidae 2 131 ssDNA; ssDNA(-) 1 circular segment 0.6-1.4 trans-encapsidated plants
336 Tombusviridae 18 93 ssRNA(+) 1-2 linear segments 3.6-6.1 no icosahedral 28-38 nm diameter plants
337 Tomosaviridae 1 1 ssRNA(+) 1 linear segment 1.1 no icosahedral 20 nm diameter plants
338 Tonesaviridae 2 4 ssRNA(+) 1 linear segment 1.1-1.3 no icosahedral 20 nm diameter plants
339 Tosoviridae 1 1 ssRNA(+/-) 2 linear segments 12.3-12.4 yes pleomorphic, mostly spherical 110-125 nm diameter vertebrates Tosoviridae
340 Tospoviridae 1 28 ssRNA(+/-) 3 linear segments 12.8-17.4 yes spherical 80-120 nm diameter plants, invertebrates
341 Toyamaviridae 3 3 dsDNA 1 linear segment 62.1-68.0 bacteria
342 Trautnerviridae 3 6 dsDNA 1 linear segment 42.8-46.3 no head-tail 60 nm diameter head, 190 nm long tail bacteria
343 Trimbiviridae 1 5 ssRNA(+/-) 1 circular segment 4.4-5.0 fungi
344 Tristromaviridae 2 3 dsDNA 1 linear segment 17.6-17.8 yes filamentous 30 nm diameter, 400 nm long archaea Tristromaviridae
345 Tulasviridae 2 2 ssRNA(+/-) 1 linear segment 12.1-14.3 fungi Tulasviridae
346 Turriviridae 1 2 dsDNA 1 circular segment 16.6-17.7 no icosahedral 100 nm diameter archaea Turriviridae
347 Tymoviridae 3 43 ssRNA(+) 1 linear segment 6.0-7.6 no icosahedral 30 mn diameter plants, invertebrates
348 Umezonoviridae 2 55 dsDNA 1 linear segment 28.7-31.8 bacteria
349 Unambiviridae 1 4 ssRNA(+/-) 1 circular segment 4.3-4.9 fungi
350 Ungulaviridae 1 1 dsDNA 1 linear segment 20.8-20.9 yes filamentous 24 nm diameter, 900 nm long archaea Ungulaviridae