sp. nov., sp. nov., and sp. nov., novel psychrophilic bacteria isolated from Arctic soil.

This study presents taxonomic description of strains LB-D12, AT-3-2, AT-3-7, and TSA-D2 isolated from Arctic soil. All strains were psychrophilic, Gram-stain-negative, aerobic, non-motile, and rod-shaped. Phylogenetic analysis showed that these strains belonged to the genus . Strains LB-D12, AT-3-2 and AT-3-7 were closest to LMG 22018 (98.5-98.8% sequence similarity). Strain TSA-D2 was closest to DSM 15718 (98.3 % sequence similarity). These strains shared common chemotaxonomic features comprising MK-6 as a sole quinone, phosphatidylethanolamine as the principal polar lipid, and summed feature 3 (iso-C 2-OH and/or Cω7), iso-C 3-OH, Cω6, iso-C, and anteiso-C as the main fatty acids. The ANI and dDDH values between these novel isolates and their closest relatives were below the cut-off values of 95 and 70 %, respectively used for species demarcation. The DNA G+C content of all strains ranged from 34.2 to 34.6 mol%. The obtained polyphasic taxonomic data suggested that the isolated strains represent novel species within the genus , for which the names sp. nov. (type strain LB-D12=KEMB 9005-737=KACC 21180=NBRC 113784), sp. nov. (type strain AT-3-2=KEMB 9005-738=KACC 21176=NBRC 113785), and sp. nov. (type strain TSA-D2=KEMB 9005-741=KACC 21179=NBRC 113788) are proposed.