RT Journal Article SR Electronic(1) A1 Fukui, Youhei A1 Kobayashi, Masahiro A1 Saito, Hiroaki A1 Oikawa, Hiroshi A1 Yano, Yutaka A1 Satomi, MasatakaYR 2013 T1 Algimonas ampicilliniresistens sp. nov., isolated from the red alga Porphyra yezoensis, and emended description of the genus Algimonas JF International Journal of Systematic and Evolutionary Microbiology, VO 63 IS Pt_12 SP 4407 OP 4412 DO https://doi.org/10.1099/ijs.0.053405-0 PB Microbiology Society, SN 1466-5034, AB Three strains (14A-2-7T, 14A-3-1 and 14A-3) of Gram-stain-negative, prosthecate, motile bacteria were isolated from an algal medium supplemented with 10 mg ampicillin l−1 (w/v), in which the red alga Porphyra yezoensis had been cultured. Based on the 16S rRNA gene sequence analysis, the three isolates formed a cluster with the genus Algimonas of the family Hyphomonadaceae . The sequences of the three isolates had high similarity with those of Algimonas porphyrae 0C-2-2T (97.6 % similarity) and Litorimonas taeanensis G5T (95.6 % similarity). The DNA G+C contents of the three isolates ranged from 54.3 to 55.0 mol%, which were more similar to that of A. porphyrae 0C-2-2T (58.5 mol%) than to that of L. taeanensis G5T (47.1 mol%). The DNA–DNA relatedness showed that the three isolates were representatives of the same species (88.1–94.0 % relatedness) and that strain 14A-2-7T was a representative of a different species from A. porphyrae 0C-2-2T and L. taeanensis G5T (1.2–8.6 % relatedness). The phenotypic characteristics of strain 14A-2-7T differed by 20 results and 30 results from A. porphyrae 0C-2-2T and L. taeanensis G5T, respectively. The three isolates contained ubiquinone-10 as the predominant quinone and C18 : 1ω7c as the major fatty acid. Based on the polyphasic taxonomic analysis, the three isolates represent a novel species of the genus Algimonas , for which the name Algimonas ampicilliniresistens sp. nov. is proposed. The type strain is 14A-2-7T ( = LMG 26421T = NBRC 108219T). An emended description of the genus Algimonas is also proposed., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.053405-0