On the inadvisability of separating the genera Micrococcus and Staphylococcus

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Abstract
On the basis of their characteristics, or ganisms of the Micrococcus-Staphylococcus group cannot be separated into spp. (or genera) except in a purely arbitrary and artificial manner. With respect to utilization of ammonium phosphate and asparagine as sole N sources, these organisms constitute a continuous series which includes every con ceivable combination of characters, and shows no line of demarcation between spp. and genera. It is concluded that separation of the genera Micrococcus and Staphylococcus at the present time is unwise. Micrococcus Conn 1872 would be the correct generic name for these organisms provided that a type culture can be found which conforms to the original description of the type sp., M. luteus (Schroeter) Conn. The strain designated as Amer. Type Culture Collection No. 398 cannot serve as type culture if it fails to grow in media containing ammonium tartrate as the sole source of N, C, and energy.

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