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
151 Lutetiaviridae 1 1 dsDNA 1 linear segment 83.0–83.1 predicted head-tail archaea
152 Madisaviridae 1 1 dsDNA 1 linear segment 49.1–49.2 no head-tail 50 nm diameter head, 110 nm long tail archaea Madisaviridae
153 Madridviridae 1 2 dsDNA 1 linear segment 19.3–19.8 no prolate, head-tail 65 nm long and 45 nm wide head, 20 nm long tail bacteria
154 Mahapunaviridae 11 31 ssDNA(+/-) 1 circular segment 1.9–2.5 plants, invertebrates, vertebrates
155 Malacoherpesviridae 2 2 dsDNA 1 linear segment 207.4–211.6 yes pleomorphic, mostly spherical 150–200 nm diameter invertebrates Malacoherpesviridae
156 Mamonoviridae 1 2 dsDNA 1 linear segment 362.8–381.3 no icosahedral 260 nm diameter protists
157 Marnaviridae 7 20 ssRNA(+) 1 linear segment 6.3–9.6 no icosahedral 22–35 nm diameter protists Marnaviridae
158 Marseilleviridae 2 4 dsDNA 1 circular segment 346.7–380.1 no icosahedral 190–250 nm diameter protists
159 Matonaviridae 1 3 ssRNA(+) 1 linear segment 9.6–9.8 yes pleomorphic, mostly spherical 50–90 nm diameter vertebrates Matonaviridae
160 Matsushitaviridae 1 2 dsDNA 1 circular segment 17.0–19.7 no icosahedral 130 nm diameter bacteria
161 Maviroviridae 1 1 dsDNA 1 circular segment 19.0–19.1 no icosahedral 50–60 nm diameter protists
162 Mayoviridae 2 4 ssRNA(+) 2 linear segments 7.6–9.3 no icosahedral 33 mn diameter plants Mayoviridae
163 Medioniviridae 2 2 ssRNA(+) 1 linear segment 25.0–25.1 invertebrates
164 Megabirnaviridae 1 5 dsRNA 2 linear segments 13.9–17.0 no icosahedral 52 nm diameter fungi Megabirnaviridae
165 Megatotiviridae 1 2 dsRNA 1 linear segment 12.4–13.4 no icosahedral 50 nm diameter fungi
166 Mesomimiviridae 1 3 dsDNA 1 linear segment 437.2–473.6 no icosahedral 150 nm diameter protists
167 Mesoniviridae 4 14 ssRNA(+) 1 linear segment 18.9–21.0 yes spherical 60–120 nm diameter invertebrates
168 Mesyanzhinovviridae 14 33 dsDNA 1 linear segment 55.1–64.1 no prolate, head-tail 70 nm long and 50 nm wide head, 145 nm long tail bacteria
169 Metaviridae 2 31 ssRNA-RT 2 identical linear segments 4.9–13.6 uncertain icosahedral VLP 47 nm diameter protists, fungi, plants, invertebrates, vertebrates Metaviridae
170 Metaxyviridae 1 1 ssDNA(+) 3–4 circular segments 3.2–4.4 no icosahedral 20 nm diameter plants Metaxyviridae
171 Microviridae 7 22 ssDNA(+) 1 circular segment 4.4–6.3 no icosahedral 25–30 nm diameter bacteria
172 Mimiviridae 9 15 dsDNA 1 linear segment 617.4–1992.0 no icosahedral 440–450 nm diameter (capsid) protists
173 Mitoviridae 4 105 ssRNA(+) 1 linear segment 2.1–5.0 fungi, plants
174 Molycolviridae 1 2 dsDNA 1 linear segment 124.1–124.7 no head-tail 75 nm diameter head, 100 nm long tail bacteria
175 Monocitiviridae 1 1 dsRNA 1 linear segment 6.0–6.1 no icosahedral 43 nm diameter fungi