1887

Abstract

Two groups of previously unknown Gram-negative, strictly anaerobic, pigment-producing, rod-shaped bacteria, which phenotypically and phylogenetically displayed a close association with the recently described species , were characterized using phenotypic and molecular taxonomic methods. A 16S rRNA gene sequence divergence of approximately 3 % between the two unknown bacteria and , as well as distinguishable biochemical characteristics, demonstrates that these organisms are genotypically and phenotypically distinct and that each group represents a previously unknown subline within the genus . Chromosomal DNA–DNA reassociation studies further confirmed the separateness of the unidentified bacteria and . On the basis of the phenotypic and phylogenetic findings, two novel species, sp. nov. and sp. nov., are proposed. The type strains of and are WAL 8169 (=CCUG 48946=ATCC BAA-1178) and WAL 8301 (=CCUG 48947=ATCC BAA-1179), respectively; their DNA G+C contents are 58 and 56 mol%, respectively.

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2006-08-01
2020-10-27
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