Description of two novel species of the family Ornithinimicrobiaceae: Serinicoccus shuyuelongi sp. nov., and Ornithinimicrobium jinqii sp. nov., isolated from the faeces of the wild birds in the Qinghai–Tibet Plateau of China

Four strains (LYQ92^T, LYQ131, LYQ121^T and LYQ103) were isolated from the faeces of Anser anser and Anser indicus in the Qinghai, PR China. Phylogenetic analyses based on 16S rRNA gene and genome sequences demonstrated that strains LYQ92^T and LYQ131 were adjacent to Serinicoccus profundi MCCC 1A05965^T and Serinicoccus sediminis KCTC 49173^T, while strains LYQ121^T and LYQ103 were most closely related to Ornithinimicrobium kibberense DSM 17687^T, Ornithinimicrobium avium KCTC 49180^T, Ornithinimicrobium tianjinense CGMCC 1.12160^T and Ornithinimicrobium cerasi CPCC 203383^T. Four novel strains were Gram-stain positive, oxidase-negative, catalase-positive, aerobic, non-motile and coccoid- and rod-shaped. Strains LYQ92^T and LYQ131 grew at 10-37 °C, pH 6.0-10.0 and 0-13.0% (wt/vol) NaCl, while strains LYQ121^T and LYQ103 grew at 10-35 °C, pH 7.0-9.0 and 0-7.0% (wt/vol) NaCl. Both strains LYQ92^T and LYQ121^T had MK-8(H4) as the primary respiratory quinone and contained diphosphatidylglycerol, phosphatidylglycerol and phosphatidylinositol. Major fatty acids of strains LYQ92^T and LYQ131 were iso-C_16:0, iso-C_15:0, anteiso-C_17:0, anteiso-C_15:0 and summed feature 9 (10-methyl C_16:0 and/or iso-C_17:1 ω9c), while those of strains LYQ121^T and LYQ103 were iso-C_16:0, iso-C_15:0 and summed feature 9. Strain LYQ92^T contained ribose, glucose and galactose as major sugars and alanine, glutamic acid, serine, glycine, aspartic acid and ornithine as major amino acids. Strain LYQ121^T had a similar composition but lacked galactose and serine. Based on polyphasic characterization, these strains represent two novel species within the family Ornithinimicrobiaceae, proposed as Serinicoccus shuyuelongi sp. nov. (type strain LYQ92^T=GDMCC 1.5391^T=KCTC 59547^T) and Ornithinimicrobium jinqii sp. nov. (type strain LYQ121^T=GDMCC 1.5402^T=KCTC 59549^T), respectively.