A novel bacterium strain QS115T was isolated from deep-sea sediment collected from
the South China Sea at a depth of 1,151 m. Phylogenetic analyses based on 16S
rRNA gene sequences indicated that QS115T was most closely related to
Parasedimentitalea marina W43T, with similarity of 98.21 %. Strain QS115T shared
82.39 % average nucleotide identity (ANI), 26.3 % digital DNA–DNA hybridization
(dDDH), and 85.32 % average amino acid identity (AAI) with P. marina W43T. Cells of
strain QS115T were Gram-stain-negative, rod-shaped, and grew optimally at 10 ℃, pH
7.5 and 2 % (w/v) NaCl. The principal fatty acids were summed feature 8 (C18:1
ω7c/ω6c), major respiratory quinone was ubiquinone-10 and predominant polar lipids
were diphosphatidylglycerol, phosphatidylethanolamine, glycophospholipid,
phosphatidylglycerol, and phosphatidylcholine. Polyphasic analyses of physiological,
phenotypic characteristics and genomic analyses suggested that strain QS115T
represents a novel species of the genus Parasedimentitalea, for which the name
Parasedimentitalea psychrophila sp. nov. is proposed (type strain QS115T = MCCC
1K04395T = JCM 34219T).