flexal mammarenavirus flexal mammarenavirus flexal mammarenavirus (also known as the flexal virus or flev, and previously known by the laboratory code bean 293022) is a mammarenavirus: an arenavirus with a mammalian host. it was first found in semiaquatic rodents of the genus oryzomys in tropical forest in the pará area of brazil. flexal mammarenavirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: negarnaviricota class: ellioviricetes order: bunyavirales family: arenaviridae genus: mammarenavirus species: flexal mammarenavirus it is a member of clade a of the tacaribe (or "new world") serocomplex of the family arenaviridae. laboratory workers infected by flexal virus have exhibited febrile illness.flexal virus is listed as a un 2814 category a infectious substance.