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A Gram-stain-negative, aerobic and rod-shaped, bacterium designated as strain BS18 T , was isolated from compost and subjected to a polyphasic taxonomic analysis. On the basis of the results of 16S rRNA gene sequence analysis, BS18 T represents a member of the genus Olivibacter of the family Sphingobacteriaceaeand is most closely related to Olivibacter oleidegradansTBF2/20.2 T (93.7 %), Olivibacter jilunii 14-2A T (93.6 %), Olivibacter ginsengisoli Gsoil 060 T (93.6 %), Pseudosphingobacterium domesticumDC186 T (93.0 %) and shared ≤93.1 % sequence similarity with the other members of the genus Olivibacter. BS18 T contained MK-7 as the predominant quinone, iso-C15 : 0, iso-C17 : 0 3-OH and summed feature 4 (iso-C15 : 0 2-OH and/or C16 : 1ω7c), as the major fatty acids and phosphatidylethanolamine (PE) as main polar lipid. BS18 T could be distinguished from the other members of the genus Olivibacter by a number of chemotaxonomic and phenotypic characteristics. On the basis of the results of polyphasic taxonomic analysis, BS18 T represents a novel species within the genus, for which the name Olivibacter ginsenosidimutans sp. nov. is proposed. The type strain of Olivibacter ginsenosidimutans is BS18 T (=KACC 16612 T =JCM 18200 T ). It is also proposed to transfer Pseudosphingobacterium domesticumto the genus Olivibacter, as Olivibacter domesticus comb. nov. (type strain DC186 T =CCUG 54353 T =LMG 23837 T ).

A Gram-reaction-negative, aerobic, non-motile and rod-shaped bacterial strain designated Gsoil 636T was isolated from soil of a ginseng cultivation field in Pocheon Province, South Korea and its taxonomic position was investigated using a polyphasic approach. Gsoil 636T grew at 18-30 °C and at pH 6.0-8.0 on R2A medium. Gsoil 636T possessed β-glucosidase activity, which was responsible for its ability to transform ginsenoside Rb1 (ones of the dominant active components of ginseng) to F2. On the basis of 16S rRNA gene sequence similarity, Gsoil 636T was shown to belong to the family Chitinophagaceae and to be related to Flavisolibacter ginsengiterrae Gsoil 492T (96.7 % sequence similarity), Flavisolibacter ginsengisoli Gsoil 643T (96.6 %) and Flavisolibacter rigui 02SUJ3T (96.6 %). The G+C content of the genomic DNA was 48.9 %. The predominant respiratory quinone was MK-7 and the major fatty acids were iso-C15 : 0, summed feature 3 (comprising C16 : 1ω6c and/or C16 : 1ω7c) and iso-C17 : 0 3-OH. DNA and chemotaxonomic data supported the affiliation of Gsoil 636T to the genus Flavisolibacter. Gsoil 636T could be differentiated genotypically and phenotypically from the species of the genus Flavisolibacter with validly published names. The isolate therefore represents a novel species, for which the name Flavisolibacter ginsenosidimutans sp. nov. is proposed, with the type strain Gsoil 636T (KCTC 22818T = JCM 18197T = KACC 14277T).