Akaryote is not used for a group of organisms in the way that prokaryotes and eukaryotes are used. The word akaryote is not a common word, but when used it is a synonym for akaryocyte meaning "a cell that does not have a nucleus" and is used in the context of eukaryotes, in which cells normally do have a nucleus. (It is not used in the context of a prokaryote, which does not have a nucleus but does have a cell, or in the context of a virus, which does not even have a cell.)
The diagrams in your question have confused two different things. The first illustration is indeed a virus, as stated. The remaining illustrations are not of a virus, though. You may have thought they were visually similar, but they are not similar in the details. The "fibres" may look like like "flagella", but they are different. The virus is not a cell and has no cell membrane. Viruses are not prokaryotes.