Phylogenetically, and occupy independent positions in the flavobacter-bacteroides phylum. Both of these organisms are gram-negative rods that are motile by gliding, chemoorganotrophic, and aerobic, degrade several kinds of biomacromolecules, and inhabit marine environments. Their major isoprenoid quinone is menaquinone 7. The G+C content of the DNA of is 35 to 37 mol%, and the G+C content of the DNA of is 40 to 42 mol%. In addition to constituting an independent phylogenetic lineage, each species has a distinctive cellular polyamine constitution. is characterized by possessing cadaverine as its major polyamine, and is characterized by possessing spermidine, in contrast to most species of the genera , and and related organisms, which possess homospermidine. Transfer of to the genus gen. nov. as comb. nov. and transfer of to the genus gen. nov. as comb. nov. are proposed.


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