Hymenobacter baengnokdamensis sp. nov., Isolated from the Soil of a Crater Lake in Korea

Hymenobacter canadensis sp. nov., isolated from freshwater of the pond in Cambridge Bay, Canada

A Gram-stain-negative, aerobic, reddish-coloured, rod-shaped and non-motile strain PAMC 29467^T, was isolated from freshwater of the pond in Cambridge Bay, Canada. Strain PAMC 29467^T was closely related to Hymenobacter yonginensis (98.1 % 16S rRNA gene similarity). Genomic relatedness analyses showed that strain PAMC 29467^T is distinguishable from H. yonginensis based on average nucleotide identity (91.3 %) and digital DNA-DNA hybridization values (39.3 %). The major fatty acids (>10 %) of strain PAMC 29467^T were summed feature 3 (C_16 : 1  ω7c and/or C_16 : 1  ω6c), C_15 : 0 iso, C_16 : 1  ω5c and summed feature 4 (C_17 : 1 iso l and/or anteiso B). The major respiratory quinone was menaquinone-7. The genomic DNA G+C content was 61.5 mol%. Strain PAMC 29467^T was separated from the type species in the genus Hymenobacter by its distinct phylogenetic position and some physiological characteristics. As a result, a novel species is proposed, with the name Hymenobacter canadensis sp. nov. (type strain, PAMC 29467^T=KCTC 92787^T=JCM 35843^T).

Hymenobacter translucens sp. nov. and Hymenobacter pini sp. nov. isolated from soil

Two novel bacterial strains BT175^T and BT728^T were isolated from soil collected in the Republic of Korea. Both strains were Gram stain negative, rod shaped, and had circular, convex, and pink-colored colonies. The 16S rRNA gene sequence similarity between the strains BT175^T and BT728^T was 93.6%, indicating that they represent a distinct species. 16S rRNA sequence analysis indicated that strains BT175^T and BT728^T belong to a distinct lineage within the genus Hymenobacter (family Hymenobacteraceae, order Cytophagales, class Cytophagia, phylum Bacteroidetes). Strain BT175^T was closely related to Hymenobacter persicinus 1-3-3-3^T (97.2%, 16S rRNA gene similarity), Hymenobacter knuensis 16F7C-2^T (96.6%), and Hymenobacter daejeonensis PB105^T (96.1%). Strain BT728^T was closely related to Hymenobacter rigui KCTC 12533^T (98.4%), Hymenobacter metallilatus 9PBR-2^T (97.6%), and Hymenobacter perfusus LMG26000^T (97.4%). Strain BT175^T and BT728^T were found to have the MK-7 as the major respiratory quinone. The DNA G + C content of strain BT175^T was 61.6 mol% and BT728^T was 59.6 mol%, respectively. Characterization based on polyphasic analysis indicated that strains BT175^T and BT728^T represent novel species of the genus Hymenobacter and the names Hymenobacter translucens sp. nov. and Hymenobacter pini sp. nov. are proposed. The type strain of Hymenobacter translucens is BT175^T (= KCTC 72330^T = NBRC 115441^T) and Hymenobacter pini is BT728^T (= KACC 22629^T = NBRC 115444^T).