Abstract

Strain YIM 102744-1 T was isolated from Rhinopithecus roxellanae fecal sample collected at Yunnan Wild Animal Park, Yunnan province, PR China. Cells were Gram-stain-negative, aerobic, non-motile and irregular rods. Optimal growth occurred in the presence of 0–1.0% ( w / v ) NaCl, at pH 7.0–8.0, and at 30 °C. The predominant ubiquinone was Q-10. The major cellular fatty acids (> 10.0%) were C 18:1 ω 7 c and C 16:1 ω 7 c /C 16:1 ω 6 c . The dominant polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and phosphatidylcholine. The DNA G + C content was 62.4 mol%. Phylogenetic analysis based on 16S rRNA gene sequences revealed that YIM 102744-1 T belonged to the family Rhodobacteraceae and shared the highest similarity with the type strain Gemmobacter intermedius 119/4 T (96.6%). In addition, phylogenetic trees indicated that strain YIM 102744-1 T formed a distinct clade together with the closest relative G. intermedius 119/4 T . Based on the results of polyphasic taxonomic analysis, strain YIM 102744-1 T is considered to represent a novel species within a new genus Falsigemmobacter , for which the name Falsigemmobacter faecalis gen. nov., sp. nov. is proposed. The type strain of Falsigemmobacter faecalis is YIM 102744-1 T (= KCTC 52106 T  = CCTCC AB 2016031 T ). Because Gemmobacter intermedius 119/4 T formed a branch with YIM 102744-1 in the phylogenetic trees and was clearly separated from the other members within the genus Gemmobacter , it is also proposed to transfer into the genus Falsigemmobacter as Falsigemmobacter intermedius comb. nov. (type strain 119/4 T  = CIP 110795 T  = LMG 28215 T  = CCM 8510 T ). The type species of the genus Falsigemmobacter is Falsigemmobacter intermedius gen. nov., comb. nov.