Rhizorhabdus antheiae sp. nov. and Sphingomonas eleionomae sp. nov., new aerobic anoxygenic phototrophs isolated from a Manitoban marsh

A peach-pigmented strain FW153 T and a yellow-pigmented FW199 T were isolated from marsh water located at Fort Whyte, Manitoba, Canada. Both produce an anoxygenic photosynthetic apparatus, with a reaction centre encircled by a light-harvesting I complex containing bacteriochlorophyll a . They do not produce RuBisCo and do not grow anaerobically or autotrophically, supporting the classification of both as aerobic anoxygenic phototrophs. Sequencing of the 16S rRNA gene showed similarity to Rhizorhabdus phycosphaerae (99.93%), Rhizorhabdus wittichii (98.73%) and Rhizorhabdus histidinilytica (98.52%) for FW153 T , while for FW199 T , it was Sphingomonas molluscorum (97.47%), Sphingomonas dokdonensis (97.44%) and Sphingomonas kyeonggiensis (97.08%). Polyphasic analysis identified differences in physiology and cellular fatty acid composition, as well as within the genome, with average nucleotide identity (