A novel bacterial strain, designated KBP-13T, was isolated from a water sample taken from the Banping Lake Wetland Park in Taiwan and characterized using a polyphasic taxonomic approach. Cells of strain KBP-13T were Gram-stain-negative, aerobic, poly-�]-hydroxybutyrate-accumulating, motile rods that formed light yellow colonies. Growth occurred at 15-40 �XC (optimum, 30-40 �XC), at pH 6.0-8.0 (optimum, pH 6.0) and with 0-2 % (w/v) NaCl (optimum, 0 %). Phylogenetic analyses based on 16S rRNA gene sequences showed that strain KBP-13T belonged to the genus Uliginosibacterium within the family Rhodocyclaceae of the class Betaproteobacteria and its most closely related neighbour was Uliginosibacterium gangwonense 5YN10-9T with sequence similarity of 96.0 %. Strain KBP-13T contained summed feature 3 (comprising C16 : 1�s7c and/or C16 : 1�s6c), C16 : 0 and C14 : 0 as predominant fatty acids. The major respiratory quinone was Q-8. The DNA G+C content of the genomic DNA was 65.1 mol%. The polar lipid profile consisted of a mixture of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, one uncharacterized aminophospholipid, one uncharacterized aminolipid, two uncharacterized phospholipids and three uncharacterized glycolipids. On the basis of the genotypic, chemotaxonomic and phenotypic data, strain KBP-13T represents a novel species in the genus Uliginosibacterium, for which the name Uliginosibacterium paludis sp. nov. is proposed. The type strain is KBP-13T (=BCRC 80903T=LMG 28837T=KCTC 42655T).