avian coronavirus 9203 avian coronavirus 9203 avian coronavirus 9203 is a species of coronavirus in the genus gammacoronavirus. avian coronavirus 9203 virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: nidovirales family: coronaviridae genus: gammacoronavirus subgenus: igacovirus species: avian coronavirus 9203