decacovirus decacovirus decacovirus is a subgenus of viruses in the genus alphacoronavirus. decacovirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: nidovirales family: coronaviridae genus: alphacoronavirus subgenus: decacovirus species see text species the genus consists of the following two species: bat coronavirus hku10 rhinolophus ferrumequinum alphacoronavirus hub-2013