sp. nov. and sp. nov., isolated from .

Four yellow-coloured strains (zg-Y815/zg-Y108 and zg-Y859/zg-Y826) were isolated from the intestinal contents of and assigned to the ' group'. The four strains grew optimally on brain heart infusion agar with 5 % defibrinated sheep blood plate at 30 °C, pH 7.0 and with 0.5 % NaCl (w/v). Comparative analysis of their 16S rRNA genes indicated that the two strain pairs belong to the genus , showing the highest similarity to 785 (99.52 %), which was further confirmed by the 16S rRNA gene and genome-based phylogenetic analysis. The comparative genomic analysis [digital DNA-DNA hybridization, (dDDH) and average nucleotide identity (ANI)] proved that the four strains are two different species (zg-Y815/zg-Y108, 71.7 %/96.8 %; zg-Y859/zg-Y826, 87.3 %/98.5 %) and differ from other known species within the genus (zg-Y815, 19.6-32.3 %/77.2-88.0 %; zg-Y859, 19.5-29.3 %/77.4-86.3 %). Strain pairs zg-Y815/zg-Y108 and zg-Y859/zg-Y826 had the same major cellular fatty acids (iso-C and anteiso-C), with MK-8(H) as their dominant respiratory quinone (70.6 and 61.7 %, respectively). The leading polar lipids were diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylinositol. The detected amino acids and cell-wall sugars of the two new species were identical (amino acids: alanine, glutamic acid, and lysine; sugars: rhamnose, galactose, mannose, glucose, and ribose). According to the phylogenetic, phenotypic, and chemotaxonomic analyses, we concluded that the four new strains represented two different novel species in the genus , for which the names sp. nov. (zg-Y815= GDMCC 1.3494 = JCM 35821) and sp. nov. (zg-Y859 = GDMCC 1.3493 = JCM 35822) are proposed.