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Int J Syst Evol Microbiol 56 (2006), 2303-2307; DOI  10.1099/ijs.0.64250-0
© 2006 International Union of Microbiological Societies

Dermacoccus barathri sp. nov. and Dermacoccus profundi sp. nov., novel actinomycetes isolated from deep-sea mud of the Mariana Trench

Wasu Pathom-aree1,{dagger}, Yuichi Nogi2, Alan C. Ward1, Koki Horikoshi2, Alan T. Bull3 and Michael Goodfellow1

1 Division of Biology, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK
2 Extremobiosphere Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
3 Department of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK

Correspondence
Michael Goodfellow
m.goodfellow{at}ncl.ac.uk

The taxonomic positions of two actinobacterial strains isolated from Mariana Trench sediment were established using a combination of genotypic and phenotypic data. The strains, isolates MT2.1T and MT2.2T, formed a distinct phyletic line in the Micrococcineae 16S rRNA gene tree together with Dermacoccus abyssi NCIMB 14084T. The isolates had chemical and phenotypic properties typical of members of the genus Dermacoccus and could be distinguished sharply from one another and from the type strains of Dermacoccus abyssi and Dermacoccus nishinomiyaensis using DNA–DNA relatedness data. A range of phenotypic properties served to distinguish the two novel strains from one another and from the type strains of established Dermacoccus species. The G+C contents of the DNAs of strains MT2.1T and MT2.2T were 66.8 and 69.1 mol%, respectively. It is evident that the two isolates merit recognition as novel species within the genus Dermacoccus. The names proposed for these taxa are Dermacoccus barathri sp. nov. (type strain MT2.1T=DSM 17574T=NCIMB 14081T) and Dermacoccus profundi sp. nov. (type strain MT2.2T=DSM 17575T=NCIMB 14084T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains MT2.1T and MT2.2T are AY894328 and AY894329, respectively.

{dagger}Present address: Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.






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