ignavigranum ignavigranum ignavigranum is a gram-positive, facultatively anaerobic non-spore-forming and non-motile genus of bacteria from the family of aerococcaceae with one known species (ignavigranum ruoffiae). ignavigranum scientific classification domain: bacteria phylum: bacillota class: bacilli order: lactobacillales family: aerococcaceae genus: ignavigranumcollins et al. 1999 type species ignavigranum ruoffiae species i. ruoffiae