Taxonomy and reorientation for family
Lactobacillaceae and family
Propionibacteriaceae (Bergey's Manual) were studied from the view point of Adanson's theory, Sneath's similarity value and Hayashi's (one of the authors) concept of center species which was calculated from reciprocal mean similarity value. The results obtained are as follows.
1. Genus
LactobacillusAll species in genera
Lactobacillus, Catenabacterium, Ramibacterium and
Cillobacterium, except
Cillobacterium combesii, should be included in one genus. The new genus which includes the four genera described above should be named
Lactobacillus according to the nomenclature code.
Eubacterium crispatum also should be placed in the genus
Lactobacillus.
2. Genus
CillobacteriumSince
Cillobacterium combesii should not be included in the genus
Lactobacillus, this species constitutes genus
Cillobacterium.
3. Genus
EubacteriumEubacterium lentum only constitutes genus
Eubacterium. Other species of the genus should be included in genus
Butyribacterium, because all of them produce butyric acid from carbohydrate.
4. Genus
ButyribacteriumButyribacterium rettgeri and 18 species in
Eubacterium should be included in
Butyribacterium, because they have high similarity value reciprocally.
5. Genus
PropionibacteriumThe Bergey's classification of genus
Propionibacterium is proper.
6. Genus
ZymobacteriumOnly one species,
Zymobacterium oroticium, constitutes properly genus
Zymobacterium.
7. From the general consideration, three genera,
Lactobacillus, Cillobacterium and
Eubacterium, should constitute tribe
Lactobacilleae.
8. In family
Coccaceae, tribe
Lactobacilleae should be separated from tribe
Streptococceae.
9. Tribe
Lactobacilleae and tribe
Propionibacterieae should be proper to constitute family
Lactobacillaceae.
10. Family
Propionibacteriaceae should be subordinated to tribe
Propionibacterieae, and three genera,
Butyribacterium, Propionibacterium and
Zymobacterium, should constitute this tribe.
11. Relationship between the classification of Bergey's Manual and the authors' proposal is presented (table 6).
12. From the general consideration of the results, the authors suggested that the family
Lactobacillaceae might contain four tribes,
Lactobacilleae, Propionibacterieae and two unknown tribes.
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