<i>ACARYOCHLORIS MARINA</i> GEN. ET SP. NOV. (CYANOBACTERIA), AN OXYGENIC PHOTOSYNTHETIC PROKARYOTE CONTAINING CHL <i>D</i> AS A MAJOR PIGMENT<sup>1</sup>

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<jats:p>The phylogenetic position of an oxygenic photosynthetic prokaryote containing chl <jats:italic>d</jats:italic> as a major pigment, which have been tentatively named “<jats:italic>Acaryochloris marina</jats:italic>,” was analyzed using small subunit rDNA sequences. Phylogenetic relationships inferred among <jats:italic>A. marina</jats:italic>, selected strains from the Cyanobacteria, and plastids showed that <jats:italic>A. marina</jats:italic> was within the cyanobacterial radiation. The <jats:italic>A. marina</jats:italic> lineage diverged independently from other phylogenetic subgroups of the Cyanobacteria. No organism was found to be identical or related closely to <jats:italic>A. marina</jats:italic> by a similarity search and phylogenetic analysis. Based on these results, in addition to the reported characteristics of the cell morphology, pigment composition, and photosynthesis, a new taxon, <jats:italic>Acaryochloris marina</jats:italic> Miyashita et Chihara gen. et sp. nov., is formally proposed for the oxy‐genic photosynthetic prokaryote.</jats:p>

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