nyctacovirus nyctacovirus nyctacovirus is a subgenus of viruses in the genus alphacoronavirus. nyctacovirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: nidovirales family: coronaviridae genus: alphacoronavirus subgenus: nyctacovirus species see text species the genus consists of the following two species: nyctalus velutinus alphacoronavirus sc-2013 pipistrellus kuhlii coronavirus 3398