RT Journal Article SR Electronic(1) A1 Pérez-Rodríguez, Ileana A1 Rawls, Matthew A1 Coykendall, D. Katharine A1 Foustoukos, Dionysis I.YR 2016 T1 Deferrisoma palaeochoriense sp. nov., a thermophilic, iron(III)-reducing bacterium from a shallow-water hydrothermal vent in the Mediterranean Sea JF International Journal of Systematic and Evolutionary Microbiology, VO 66 IS 2 SP 830 OP 836 DO https://doi.org/10.1099/ijsem.0.000798 PB Microbiology Society, SN 1466-5034, AB A novel thermophilic, anaerobic, mixotrophic bacterium, designated strain MAG-PB1T, was isolated from a shallow-water hydrothermal vent system in Palaeochori Bay off the coast of the island of Milos, Greece. The cells were Gram-negative, rugose, short rods, approximately 1.0 μm long and 0.5 μm wide. Strain MAG-PB1T grew at 30–70 °C (optimum 60 °C), 0–50 g NaCl l− 1 (optimum 15–20 g l− 1) and pH 5.5–8.0 (optimum pH 6.0). Generation time under optimal conditions was 2.5 h. Optimal growth occurred under chemolithoautotrophic conditions with H2 as the energy source and CO2 as the carbon source. Fe(III), Mn(IV), arsenate and selenate were used as electron acceptors. Peptone, tryptone, Casamino acids, sucrose, yeast extract, d-fructose, α-d-glucose and ( − )-d-arabinose also served as electron donors. No growth occurred in the presence of lactate or formate. The G+C content of the genomic DNA was 66.7 mol%. Phylogenetic analysis of the 16S rRNA gene sequence indicated that this organism is closely related to Deferrisoma camini, the first species of a recently described genus in the Deltaproteobacteria. Based on the 16S rRNA gene phylogenetic analysis and on physiological, biochemical and structural characteristics, the strain was found to represent a novel species, for which the name Deferrisoma palaeochoriense sp. nov. is proposed. The type strain is MAG-PB1T ( = JCM 30394T = DSM 29363T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.000798