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Strain 17mud1-7(T), a pink, aerobic, catalase-positive, oxidase-positive and Gram-reaction-negative bacterium, was isolated from wet mud. The isolate grew aerobically at 18-37 degrees C (optimum 28 degrees C), at pH 6.0-8.0 (optimum pH 7.0) and in the presence of 0-1% (w/v) NaCl (optimum 0% NaCl). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain 17mud1-7(T) belonged to the genus Adhaeribacter with highest sequence similarity of 96.4% to Adhaeribacter aerophilus 6424S-25(T). The strain showed the typical chemotaxonomic characteristics of the genus Adhaeribacter, with the presence of menaquinone MK-7 as the respiratory quinone, and summed feature 4 (composed of iso-C-17:1 I/anteiso-C-17:1 B), iso-C-15:0 and C-16:1 omega 5c as the major fatty acids are. The polar lipid profile contained two aminophosphoglycolipids, two glycolipids and three unidentified lipids. The DNA G+C content of strain 17mud1-7(T) was 45.9mol%. Strain 17mud1-7(T) should thus be classified as representing a novel species in the genus Adhaeribacter, for which the name Adhaeribacter swui sp. nov. is proposed. The type strain is 17mud1-7(T) (=KCTC 52873(T)=NBRC 112824(T)).