<Tr> <Td_colspan="2"> <P> Myoviridae Podoviridae Siphoviridae </P> </Td> </Tr> <P> Myoviridae Podoviridae Siphoviridae </P> <P> The Caudovirales are an order of viruses also known as the tailed bacteriophages (cauda is Latin for "tail"). Under the Baltimore classification scheme, the Caudovirales are group I viruses as they have double stranded DNA (dsDNA) genomes, which can be anywhere from 18,000 base pairs to 500,000 base pairs in length . The virus particles have a distinct shape; each virion has an icosahedral head that contains the viral genome, and is attached to a flexible tail by a connector protein . The order encompasses a wide range of viruses, many of which containing genes of similar nucleotide sequence and function . Some tailed bacteriophage genomes can vary quite significantly in nucleotide sequence, however, even among the same genus . Due to their characteristic structure and possession of potentially homologous genes, it is believed these bacteriophages possess a common origin . </P> <P> There are at least 350 recognised species in this order . </P>

Tailed bacteriophages fall within which of baltimore groups