Description of Porcibacter vitabionis gen. nov., sp. nov., an anaerobe isolated from pig faeces

Two Gram-stain-positive rod-shaped anaerobic bacterial strains were isolated from pig faeces and designated as strains YH-ros2226 T and YH-ros2228. Phylogenetic analysis using 16S rRNA gene sequences revealed that the isolates were most closely related to Pararoseburia lenta KCTC 15957 T , with 92.2% similarity. The multi-locus sequence tree revealed that the isolates formed a distinct cluster within the family Lachnospiraceae . The average nucleotide identity, digital DNA–DNA hybridization, average amino acid identity and percentage of conserved proteins values between the isolates and related strains within the family Lachnospiraceae ranged from 67.0% to 68.8%, 18.5% to 33.9%, 51.5% to 54.6% and 33.6% to 44.1%, respectively. The major cellular fatty acids were C 16 : 0 , C 18 : 1 ω9 c and C 16 : 0 N alcohol. The cell wall peptidoglycan contained meso -diaminopimelic acid. The genomic DNA G+C contents of the strains were 46.8–47.0 mol%. The chemotaxonomic, phenotypic and phylogenetic properties of YH-ros2226 T (=KCTC 25944 T =JCM 37835 T ) and YH-ros2228 (=KCTC 25945=JCM 37836) suggested that they represented a novel genus and species within the family Lachnospiraceae , for which the name Porcibacter vitabionis gen. nov., sp. nov. is proposed.