Mammarenavirus is a genus of viruses in the family "Arenaviridae". Roboviruses mainly belong to the virus families Arenaviridae and Hantaviridae. Chapare mammarenavirus causes hemorrhagic fever and is a member of the virus family "Arenaviridae". The nucleoprotein structure in Lassa virus ("Arenaviridae") contains a second nuclease. In arenaviridae and bunyavirales, cap-snatching takes place in the cytoplasm. Lassa virus is a member of the Arenaviridae, a family of negative-sense, single-stranded RNA viruses. The Lassa virus is a member of the "Arenaviridae" family of viruses. Viruses of the families "Arenaviridae", "Orthomyxoviridae", "Paramyxoviridae", and "Pneumoviridae" are able to infect vertebrates.