proteocatella proteocatella proteocatella is a monotypic genus of bacteria in the family peptostreptococcaceae. the only described species is proteocatella sphenisci. proteocatella scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: peptostreptococcaceae genus: proteocatellapikuta et al. 2009 species: p. sphenisci binomial name proteocatella spheniscipikuta et al. 2009