corynebacterium matruchotii corynebacterium matruchotii corynebacterium matruchotii is a species of bacteria in the genus corynebacterium. corynebacteria occur within the normal flora of the human body. corynebacterium matruchotii scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: corynebacteriaceae genus: corynebacterium species: c. matruchotii binomial name corynebacterium matruchotii(mendel 1919) collins 1983 corynebacterium matruchotii are gram positive bacilli with long filaments and short, thick terminal ends. c. matruchotii is a bacterium of significance within the oral cavity and comprises the central filament of "corn-cob formations" (formations in which streptococcus sanguinis bacteria bind to and surround c. matruchotii to create a corn-cob appearance). c. matruchotii can be isolated from dental plaque, although it is not known to be associated with the etiology of dental diseases.