luchacovirus luchacovirus luchacovirus is a subgenus of viruses in the genus alphacoronavirus, consisting of a single species, lucheng rn rat coronavirus. lucheng rn rat coronavirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: nidovirales family: coronaviridae genus: alphacoronavirus subgenus: luchacovirus species: lucheng rn rat coronavirus