1887

Abstract

Four closely related species, , , and , form a clade within the family ; the taxonomic status and phylogenetic position of this clade have remained ambiguous for many years. To resolve this ambiguity, we tested these species against other species of the for phylogenetic and phenotypic differences. Sequence identities for the 16S rRNA gene were ≥97.4 % among members of the group, but were ≤95.5 % for members of this group in comparison with type species of other genera of the (i.e. and , with which they overlap in G+C content, and , and , with which they do not overlap in G+C content). Combined analysis of the , , , and 16S rRNA gene sequences revealed that the species of the group form a tightly clustered clade, distinct from these other genera. Furthermore, phenotypic traits differentiated the group from other genera of the , and a panel of 13 biochemical tests discriminated members of the group from type strains of and . These results indicate that the four species of the group represent a lineage within the that is distinct from other genera. We therefore propose their reclassification in a new genus, gen. nov. is composed of four species: comb. nov. (the type species) (type strain ATCC 7744 =CAIM 329 =CCUG 13450 =CIP 103206 =DSM 507 =LMG 4414 =NCIMB 1281), comb. nov. (type strain ATCC 29985 =CCUG 20283 =CIP 104991 =NCIMB 2252), comb. nov. (type strain ATCC 43839 =CIP 103166 =LMG 14010 =NCIMB 2262) and comb. nov. (type strain ATCC BAA-104 =NCIMB 13582 =LMG 24053).

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2007-12-01
2020-11-30
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