Indeed, this might have happened when a Glypta wasp was infected by an ancestral virus related to DpAV4. Nevertheless, the symbiogenic origin of GfIV from ascoviruses is also supported by morphological features of its virions [28] , which, aside from similarities in shape, also show reticulations on their surface in negatively stained preparations, a characteristic of the virions of all ascovirus species examined to date [7] .