Tectiviridae is a rare phage family including non-enveloped tail-less phages, with a double-layer capsid, where the ~15 kb linear dsDNA is located within a lipid-containing vesicle covered by an icosahedral protein capsid. Since tectiviruses are, so far, the only phages infecting the Bacillus cereus group able to behave as linear plasmids during their lysogenic cycle, it is key to assess the potential contribution of this type of elements to the genetic diversity and life traits of their hosts.
Gillis, A., & Mahillon, J. (2017). Plasmidial tectiviruses infecting the Bacillus cereus group: friends or foes ? 19th International Conference on Bacilli & Gram-Positive Bacteria, Berlin, Germany. https://hdl.handle.net/2078.5/220853