Abstract
The genus Aeromonas is currently allocated, primarily on the basis of phenotypic expression, to the eubacterial family Vibrionaceae. However, a sizeable collection of molecular genetic evidence, including 16S ribosomal ribonucleic acid catalog, 5S ribosomal ribonucleic acid sequence, and ribosomal ribonucleic acid-deoxyribonucleic acid hybridization data, indicates that Aeromonas spp. possess an evolutionary history sufficiently different from that of the Vibrionaceae to warrant removal from this family. The phylogenetic locus (i.e., intermediate between the families Enterobacteriaceae and Vibrionaceae) and phylogenetic depth of the genus Aeromonas suggest that Aeromonas spp. represent a discrete family of eubacteria, for which the name Aeromonadaceae fam. nov. is proposed.
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