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
76 Crevaviridae 3 4 dsDNA 1 segment 83.4–95.9 predicted head-tail bacteria
77 Cruliviridae 1 4 ssRNA(-) 3 linear segments 10.7–11.6 yes spherical 60–80 nm diameter invertebrates Cruliviridae
78 Curvulaviridae 1 8 dsRNA 2 linear segments 3.7–4.3 no icosahedral 27 nm diameter fungi
79 Cystoviridae 1 7 dsRNA 3 linear segments 12.6–15.0 yes spherical 85 nm diameter head bacteria Cystoviridae
80 Deltaflexiviridae 1 4 ssRNA(+) 1 linear segment 7.7–8.3 fungi Deltaflexiviridae
81 Demerecviridae 14 195 dsDNA 1 linear segment 101.6–138.0 no head-tail 70–90 nm diameter head, 150–160 nm long tail bacteria
82 Dicistroviridae 3 16 ssRNA(+) 1 linear segment 8.0–10.5 no icosahedral 30 nm diameter invertebrates Dicistroviridae
83 Discoviridae 1 6 ssRNA(-) 3 linear segments 6.3–9.7 fungi Discoviridae
84 Dishuiviroviridae 1 1 dsDNA 1 circular segment 24.7–24.8 protists
85 Draupnirviridae 42 67 ssDNA(+/-) 1 circular segment 1.5–5.3 invertebrates, vertebrates Draupnirviridae
86 Drexlerviridae 33 236 dsDNA 1 linear segment 37.6–54.5 no head-tail 50–75 nm diameter head, 100–170 nm long tail bacteria
87 Druskaviridae 2 2 dsDNA 1 linear segment 102.3–103.3 no head-tail 85 nm diameter head, 115 nm long tail archaea Druskaviridae
88 Duinviridae 10 12 ssRNA(+) 1 linear segment 3.5–4.5 no icosahedral 25 nm diameter bacteria
89 Dumbiviridae 1 7 ssRNA(+/-) 1 circular segment 4.2–5.0 fungi
90 Duneviridae 3 6 dsDNA 1 linear segment 39.2–47.0 no head-tail 60 nm diameter head, 130 nm long tail bacteria
91 Ekchuahviridae 1 2 dsDNA 1 segment 71.7–80.6 predicted head-tail archaea
92 Endolinaviridae 4 10 ssDNA(+/-) 1 circular segment 2.6–3.2 protists
93 Endornaviridae 2 31 ssRNA(+) 1 linear segment 9.6–17.7 capsidless protists, fungi, plants Endornaviridae
94 Euroniviridae 2 3 ssRNA(+) 1 linear segment 24.6–29.4 invertebrates
95 Fervensviridae 1 1 dsDNA 1 linear segment 31.2–31.3 no head-tail 50 nm diameter head, 150 nm long tail archaea
96 Fiersviridae 308 827 ssRNA(+) 1 linear segment 3.2–5.1 no icosahedral 25–26 nm diameter bacteria
97 Filoviridae 9 16 ssRNA(-) 1 linear segment 13.7–19.2 yes pleomorphic, mostly filamentous 80 nm diameter, 20–1000 nm long vertebrates Filoviridae
98 Fimoviridae 1 32 ssRNA(-) 4–10 linear segments 11.6–18.9 yes spherical 80-150 nm diameter plants Fimoviridae
99 Finnlakeviridae 1 1 ssDNA 1 circular segment 9.1–9.2 no icosahedral 60 nm diameter bacteria Finnlakeviridae
100 Flaviviridae 4 97 ssRNA(+) 1 linear segment 8.5–13.3 yes spherical 40–60 nm diameter invertebrates, vertebrates Flaviviridae