Species of the genus Sulfurimonas are reported and isolated from terrestrial habitats and marine sediments and water columns with steep redox gradients. Here we report on the isolation of strains SoZ1 and GD2 from the pelagic redoxcline of the Black Sea and the Baltic Sea, respectively. Both strains are gram-stain-negative and appear as short and slightly curved motile rods. The autecological preferences for growth of strain SoZ1 were 0–25 °C (optimum 20 °C), pH 6.5–9.0 (optimum pH 7.5–8.0) and salinity 10–40 g L⁻¹ (optimum 25 g L⁻¹). Preferences for growth of strain GD2 were 0–20 °C (optimum 15 °C), pH 7.0–8.0 (optimum pH 7.0–7.5) and salinity 5–40 g L⁻¹ (optimum 21 g L⁻¹). Strain SoZ1 grew chemolithoautotrophically, while strain GD2 also showed heterotrophic growth with short chained fatty acids as carbon source. Both species utilized hydrogen (H₂), sulfide (H₂S here taken as the sum of H₂S, HS⁻ and S²⁻), elemental sulfur (S⁰) and thiosulfate (S₂O₃²⁻) as electron donors and nitrate (NO₃⁻), oxygen (O₂) and particulate manganese oxide (MnO₂) as electron acceptors. Based on 16S rRNA gene sequence similarity, both strains cluster within the genus Sulfurimonas with Sulfurimonas gotlandica GD1^T as the closest cultured relative species with a sequence similarity of 96.74% and 96.41% for strain SoZ1 and strain GD2, respectively. Strains SoZ1 and GD2 share a ribosomal 16S sequence similarity of 99.27% and were demarcated based on average nucleotide identity and average amino acid identity of the whole genome sequence. These calculations have been applied to the whole genus. We propose the names Candidatus Sulfurimonas marisnigri sp. nov. and Candidatus Sulfurimonas baltica sp. nov. for the thiotrophic manganese reducing culture isolates from the Black Sea and Baltic Sea, respectively.

磺脲类属的物种据报道是从陆地生境，海洋沉积物和氧化还原梯度陡峭的水柱中分离出来的。在这里，我们报告了分别从黑海和波罗的海的上层氧化还原细胞中分离出菌株SoZ1和GD2的情况。两种菌株均为革兰氏阴性菌，表现为短而稍弯曲的活动杆。SoZ1菌株生长的主观偏好为0-25°C（最佳20°C），pH 6.5-9.0（最佳pH 7.5-8.0）和盐度10-40 g L ^-1（最佳25 g L ^-1）。菌株GD2的生长偏好为0-20°C（最适15°C），pH 7.0-8.0（最适pH 7.0-7.5）和盐度5-40 g L ^-1（最适21 g L ^-1））。SoZ1菌株是化学自养型的，而GD2菌株也显示了异养型的生长，其中短链脂肪酸为碳源。这两个物种利用氢（H ₂），硫化（H ₂ s这里取为H的总和₂ S，HS ^-和S ^{2- ），}元素硫（S ⁰）和硫代（š ₂ ö ₃ ^2-）作为电子供体和硝酸盐（NO ₃ ^- ），氧（O ₂）和微粒氧化锰（MnO ₂）作为电子受体。基于16S rRNA基因的序列相似性，这两种菌株属内群集Sulfurimonas与获得的Sulfurimonas gotlandica GD1 ^T是最接近的培养近缘种，菌株SoZ1和GD2的序列相似性分别为96.74％和96.41％。菌株SoZ1和GD2具有99.27％的核糖体16S序列相似性，并基于整个基因组序列的平均核苷酸同一性和平均氨基酸同一性来划分。这些计算已应用于整个属。我们建议使用Candidatus Sulfurimonas marisnigri sp。十一月 和暂定Sulfurimonas波罗SP。十一月 分别用于从黑海和波罗的海分离出硫代营养型锰的分离培养物。