The taxonomy is based on 16s rRNA sequences, and most of the staphylococcal species fall into 11 clusters:
S. aureus group – S. aureus, S. simiae
S. auricularis group – S. auricularis
S. carnosus group – S. carnosus, S. condimenti, S. massiliensis, S. piscifermentans, S. simulans
S. epidermidis group – S. capitis, S. caprae, S. epidermidis, S. saccharolyticus
S. haemolyticus group – S. devriesei, S. haemolyticus, S. hominis
S. hyicus-intermedius group – S. chromogenes, S. felis, S. delphini, S. hyicus, S. intermedius, S. lutrae, S. microti, S. muscae, S. pseudintermedius, S. rostri, S. schleiferi
S. lugdunensis group – S. lugdunensis
S. saprophyticus group – S. arlettae, S. cohnii, S. equorum, S. gallinarum, S. kloosii, S. leei, S. nepalensis, S. saprophyticus, S. succinus, S. xylosus
S. sciuri group – S. fleurettii, S. lentus, S. sciuri, S. stepanovicii, S. vitulinus
S. simulans group – S. simulans
S. warneri group – S. pasteuri, S. warneri
A twelfth group – that of S. caseolyticus – has now been moved to a new genus Macrococcus, the species of which are currently the closest known relatives of the Staphylococci.
Read more about this topic: Staphylococcus
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