The nonmotile, vibrioid, curly or ring-forming bacteria were examined to assess their systematic relationships through determination of the guanine-plus-cytosine contents of their deoxyribonucleic acids and the degrees of homology among the deoxyribonucleic acids of the various genera and species. Our results verify that , and ("") are separate genera. However, our results also indicate that (i) "" is not a separate species but is in fact a strain of , (ii) should not be used to create the new genus "" and the latter name should be discarded, and (iii) "" is very similar to , but these two genera exhibit very low levels of deoxyribonucleic acid-deoxyribonucleic acid homology and should probably remain separate at least until additional information is available.


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