dalvirus dalvirus dalvirus is a genus of viruses in the realm ribozyviria, containing the single species dalvirus anatis. dalvirus virus classification (unranked): virus realm: ribozyviria family: kolmioviridae genus: dalvirus synonyms dabbling duck virus 1 (dabdv-1) avhdv hosts the grey teal (anas gracilis), chestnut teal (a. castanea), and pacific black duck (a. superciliosa) serve as its hosts. a. gracilis a. castanea a. superciliosa