Abstract
Study on the classification and reorientation for the classical family Neisseriaceae, being based on the Adanson's thinking, Sneath's similarity value and the author Hayashi's concept of center species was made and the following results were obtained.
1) The classical family Neisseriaceae should be subordinated tribe Neisserieae which consists of three genera Neisseria, Veillonella and Halococcus.
2) A new genus Halococcus was induced theoretically in accordance with the relationship and classification of the whole cocci group.
3) The correlated features of genus Halococcus were as follows: Gram negative, pair, aerobic, halophilic and do not ferment glucose.
4) From the general consideration of cocci group according to the above method and the concepts, the author proposed that cocci group should be integrated as one family Coccaceae which includes four tribes, Micrococceae, Sarcineae, Streptococceae and Neisserieae.
5) The classification of family Coccaceae and the key features of each tribes and genera, presented by the authors, are as follows.
