myotacovirus myotacovirus myotacovirus is a subgenus of viruses in the genus alphacoronavirus, consisting of a single species, myotis ricketti alphacoronavirus sax-2011. myotis ricketti alphacoronavirus sax-2011 virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: nidovirales family: coronaviridae genus: alphacoronavirus subgenus: myotacovirus species: myotis ricketti alphacoronavirus sax-2011