staphylococcus auricularis staphylococcus auricularis staphylococcus auricularis is a gram-positive member of the bacterial genus staphylococcus consisting of pairs or tetrads of cocci. this species was originally isolated from the exterior of a human ear and is weakly hemolytic. because it commonly exists on human skin, it may be able to cause opportunistic infections or sepsis, although this is very rare. staphylococcus auricularis scientific classification domain: bacteria phylum: bacillota class: bacilli order: caryophanales family: staphylococcaceae genus: staphylococcus species: s. auricularis binomial name staphylococcus auriculariskloos and schliefer 1983